10.1.1. Installation and installation of AMS and AFU are carried out according to the documentation supplied by the equipment supplier company complete with the equipment, and are carried out in accordance with the requirements of the Industry Construction and Technological Standards for the installation of structures and devices for communication, radio broadcasting and television OSTN-600-93 in accordance with the work project , developed by installation organizations.
10.1.2. Persons at least 18 years of age who have passed a medical examination and are authorized to work at height are allowed to work on the construction and maintenance of automatic mechanical installations and automatic control units.
10.1.3. All work related to ascent to the AWS must be carried out according to work orders (Appendix 8) by teams of at least 2 people, one of whom must have an electrical safety group of at least IV, the other - at least III group.
10.1.4. The right to issue a work order and conduct briefings before starting work on the AWS is granted to persons specified in the order for the organization.
10.1.5. All work with AFU within areas where EMF intensity exceeds the norms must be carried out with the transmitters turned off, and warning posters must be posted.
10.1.6. The dangerous zone around masts and towers (hereinafter referred to as supports) during their operation is considered to be the zone whose border is located from the center of the base of the support to 1/3 of its height.
When working in a hazardous area, only persons directly associated with this work are allowed to be present, with the obligatory use of protective helmets. Safety helmets are also used for any work on supports.
Protection of service personnel located in the danger zone in case of possible falling of ice and snow from the AWS must, in addition, be carried out:
A) designation of the danger zone with the installation of warning signs;
B) drawing up instructions and conducting briefings on ice hazards;
C) protection of passages located in the danger zone with canopies or structures of a permanent or removable structure.
10.1.7. It is prohibited to be on the open areas of the supports during a thunderstorm and when it is approaching, as well as when the wind force is more than 12 m/s, ice, rain and snowfall.
10.1.8. During a thunderstorm or when it is approaching, it is prohibited to stay near grounding connections. There must be warning signs at the installation sites of grounding conductors.
10.1.9. When climbing onto supports on stairs, the following requirements must be met:
A) climbing stairs without safety guards that meet the requirements of these Rules is possible only in emergency cases and each time by written order of the technical manager of the organization operating radiotelephone communication facilities, or under the direct supervision of one of them;
B) when one person is lifting along the mast trunk, the hatches of the sections must be closed as they rise;
C) climbing vertical stairs is permitted only in shoes with non-slip soles and gloves. The climber's clothing must be tightly fitted;
D) if a group of people is climbing a vertical ladder, then the rise of the next worker is permitted only when the hatch on the platform above is closed;
E) if several people climb the lattice tower, then only one person should climb each flight of stairs in turn;
E) it is prohibited to climb the shaft of a round mast using an elevator or an emergency staircase if the inside of the mast is not illuminated (except in cases of eliminating the failure of the internal lighting of the masts).
10.1.10. The antenna operator must:
Wear a serviceable safety assembly belt and, while working on the support, attach it with a chain to its structures. When climbing onto a support on claws, in order to be able to safely pass through the yoke to which the guy ropes are attached, you should use a belt with two chains;
Work in safety helmets and special shoes with soles without metal nails. An exception may be work in workshops, and on the surface of the earth - outside hazardous areas.
10.1.11. When working on antenna-feeder structures, you must use canvas gloves.
10.1.12. Climbing work on the AWS must be carried out by at least two antenna operators, one of whom is an observer.
10.1.13. When lifting and lowering the antenna operator on the support, his working tools and small parts must be in a bag with a lock that prevents it from opening spontaneously. When climbing stairs, the bag is attached with straps to the antenna operator; when climbing on a cradle, it is attached to the latter. It is prohibited to place tools, nuts or other objects on the support structures.
10.1.14. In cases where permanently operating equipment of several organizations is mounted on a support, the following order of work is determined.
Each of the tenant organizations and the parent organization on the balance sheet of which the support is located, by their orders, appoint persons responsible for carrying out work on the support with the right to issue orders for their implementation. The names of responsible persons and their positions must be officially reported to the parent organization.
The work order for carrying out work on the equipment located on the support is issued by the organization that owns this equipment. This organization is responsible for implementing all measures for the safe conduct of work.
Before carrying out work, the tenant organization must agree on the time, duration and conditions of the work with other tenant organizations, and then obtain permission from the technical manager of the parent organization. Regular work must be carried out according to a predetermined schedule, agreed upon with all tenant organizations and approved by the technical manager of the parent organization.
Permission to work on the support is carried out by the parent organization and the tenant organization responsible for carrying out work on the equipment located on the support. At the same time, the parent organization records in the operational journal the name of the organization that issued the work order for work on the support, the number of the work order, the date of its issue, the duration and type of work, the name of the person who issued the work order.
If necessary, a representative of the parent organization indicates in the work order and logbook additional organizational and technical measures for the safe conduct of work on the support.
Representatives of both organizations (head and tenant) sign the order.
After completion of the work, the work order is closed in the usual manner with a mark and an entry about the completion of work in the journal.
The work order remains with the tenant organization performing the work.
10.1.15. Work on servicing AFUs mounted on the roofs of technical buildings or on other structures of this kind must be carried out using special devices designed for work at heights, and taking into account the requirements for them set out in Chapter 10.2 of these Rules.
10.1.16. When servicing automated systems located on the roofs of technical buildings, before going onto the roof it is necessary to check with an indicator that there is no extraneous voltage on the roof of the building, metal stairs and so on.
10.1.17. Work on flat fenced roofs is permitted using a safety belt and wearing shoes with non-slip soles.
If it is necessary to approach the edge of a flat roof, then the use of a safety rope is mandatory.
10.1.18. When working on supports, if necessary, the antenna operator must be equipped with means of communication: a receiving and transmitting radio station, a megaphone or a telephone.
Chapter 18. GENERAL REQUIREMENTS18.1. Maintenance and repair of antenna mast structures (AMS) must be carried out in accordance with the maintenance project or instructions approved by the chief engineer of the enterprise, in compliance with the requirements of these Rules.
18.2. Persons who are permitted to work at height and who meet the requirements of clause 2.1 of these Rules are allowed to work at height.
Work on structures that do not have fencing, as well as work related to going beyond the fencing, must be carried out by steeplejacks.
Persons (workers and technical engineers) who are at least 18 years old, who have passed a medical examination and are declared fit, who have at least one year of experience in steeplejack work and a tariff category of at least 3 are allowed to carry out independent steeplejack work. Workers admitted to steeplejack work for the first time must work for one year under the direct supervision of experienced workers appointed by order of the head of the enterprise.
Note. Climbing work is considered to be work performed at a height of more than 5 m from the surface of the ground, ceiling or working floor on which work is being carried out, directly from structures during installation or repair, while the main means of protecting workers from falling from a height is a safety belt.
18.3. Employees of repair and construction organizations working at the operated facility are allowed onto the antenna field in accordance with the requirements of the Regulations specified in clause 2.2. In this case, responsibility for compliance with the Rules rests with the technical manager of the repair and construction organization.
18.4. The dangerous zone around masts and towers during operation is considered to be the zone whose boundary is located from the center of the base of the support at a distance equal to 1/3 of its height.
When working in a hazardous area, only persons directly associated with this work are allowed to be present, with the obligatory use of protective helmets.
The presence of persons not associated with their maintenance is not permitted on the antenna fields of transmitting radio stations, television centers, television repeaters.
18.5. Lifting people onto the AWS is prohibited:
when the voltage is not removed above 42 V;
during a thunderstorm and as it approaches;
in case of ice, heavy rain, snowfall or fog;
when the carabiner of the safety belt is not fastened to the cradle;
at wind speeds above 12 m/s;
in the dark;
on a lifting device whose next test period has expired;
on defective ropes;
without a protective helmet and safety belt.
In the spans of tubular supports limited by solid floors with folding hatches, the simultaneous movement of more than one antenna-mast operator is prohibited. In this case, the hatches must be closed.
18.6. Work on supports in the dark is possible only during the elimination of accidents and in cases specifically permitted by the relevant higher organization. In this case, it is necessary to provide adequate lighting.
18.7. The antenna mast operator must:
wear a working safety belt and, while working on the support, be attached with a chain to its structures. When climbing the mast on claws, to be able to safely cross the yoke to which the guy ropes are attached, you should use a belt with two chains;
carry out repair work on the support only after it is attached to its structures with a safety belt. Supports should be painted from ladders, scaffolding or from a cradle;
work in safety helmets and special shoes with soles without metal nails. An exception may be work in workshops, and on the surface of the earth - outside hazardous areas.
18.8. When working on antenna-feeder structures, you must use canvas gloves.
18.9. Climbing work on the AWS must be carried out by at least two mastmen, one of whom is an observer.
The observer must be outside the danger zone and have a mechanic's belt, in case of work on wooden supports, and claws.
18.10. Welding work is allowed to be carried out from the inventory cradle of the lifting device, provided that the cradle is suspended from the load rope through an IT type insulator and measures are taken to prevent it from falling.
18.11. During a thunderstorm and as it approaches, it is prohibited to stay near grounding conductors. Work on the antenna field must be stopped and people must be moved indoors. Warning posters “Stop. Voltage” must be installed at the installation sites of grounding conductors.
12.18. At radio centers where several transmitters operate simultaneously, work on supports, antennas and feeders is possible only after portable grounding connections have been installed to ensure minimal induction of EMF at the workplace.
18.13. Work on antenna structures (masts, antennas, feeders, etc.) of existing transmitting centers and radio stations is possible only with the permission of the shift supervisor, having received a special order (Appendix 9), which is issued for work on each antenna structure.
The work order is issued by a person authorized to do so by order of the enterprise. A written order for the enterprise also appoints a responsible work manager, a work performer and a permitter.
A person who combines the duties of a responsible manager, a work supervisor and a permitter can participate in the work of only one team, without having the right to supervise the work of other teams.
The person issuing the order must have electrical safety group V, the responsible manager must have at least group IV, and the work performer must have at least group III.
The procedure for issuing and storing a work order for work on antenna-mast and feeder structures is the same as for a work order for work on electrical installations (see Chapter 10 of these Rules).
18.14. Antenna-feeder devices of receiving centers are serviced without a work order, but with an entry in the operational log.
18.15. Before working on antenna structures, the shift supervisor must allow access to the work site, having previously completed technical measures in accordance with the work order.
18.16. At the antenna switchboard, the person performing the shutdown hangs up a prohibitory poster: “Do not turn it on. People are working.”
18.17. If the transmitter has only one antenna and work on it or the antenna feeder is carried out when the transmitter is turned off, then this work can be performed without a work order and an entry in the operational log.
In this case, the shift supervisor must turn off the disconnector or switch for the mechanical blocking of the transmitter and hang on it a prohibiting poster “Do not turn it on. People are working.”
On a transmitter with a rod lock, the key to the switch lock or lock disconnector is issued to the responsible work manager against a signature in the operational log.
18.18. On feeder supports and portals with several feeders, at least one of which is energized, two people must work simultaneously, one of whom must have an electrical safety group of at least IV, the other - not lower than III group.
The antiphase wires of the section of the transmitting antenna feeder on which work is being carried out must be short-circuited to each other on both sides and grounded.
Repair and other work on the upper feeder is prohibited if the lower feeder is energized.
18.19. With any switches and any switching scheme, before switching the antenna, you must first turn off the anode voltage at the transmitter. Personnel on the antenna field or inside antenna pavilions or technical buildings must switch feeder lines in accordance with instructions that take into account the existing switching system at the radio center and the features of the equipment installed there.
Before switching antennas on a feeder pole or in a separate room, the person on duty must turn off the anode voltage at the transmitter, apply grounding to the feeder, and hang a poster on the interlock disconnector "Do not turn on. People are working."
Grounding is applied to the feeder if the transition to another antenna is carried out without a switch equipped with a steering wheel drive.
Anode voltages can be applied to the transmitter only after the order is closed. The duty officer disconnects the grounding and removes the prohibitory posters.
18.20. The configuration of antenna-feeder devices of transmitting radio centers and measurements on them related to the connection of drives to live parts of the antenna or feeder must be carried out by at least two persons, one of whom must have electrical safety group IV, the others - III.
Work must be performed according to work orders.
Before starting adjustments or measurements, a worker with electrical safety group IV must make sure that there is no constant voltage on the antenna or feeder and that the high-frequency chokes designed to drain static charges are in good condition.
Measuring instruments and indicators used when setting up AFU at transmitting radio centers must have insulating handles.
18.21. When antenna-feeder devices related to television, VHF FM transmitters, radio relay stations, etc. are located together on a support, work on the support is permitted only if the EMF intensity at the workplace does not exceed the established standards. In other cases, work must be carried out when the corresponding transmitting devices are turned off.
18.22. Traffic through the antenna field is permitted only along routes established by the administration of the radio enterprise. Traffic outside established routes is possible only with permission issued for each trip by the chief engineer; he also appoints an accompanying person for the duration of the vehicle's passage. The administration of the radio enterprise must also establish possible parking locations on the antenna field.
18.23. Wooden masts, anchors and feeder poles, in which the thickness of the rotted layer at the surface of the earth is 10% of the diameter or more, must be replaced.
18.24. When replacing rotten anchors, the guy ropes must be transferred to a new anchor pre-installed in close proximity to the old one.
18.25. Permanent guy lines can only be removed after installing temporary ones. It is prohibited to stand on the support while adjusting the guys.
18.26. The bases of antenna masts isolated from the ground must be surrounded by a fence with a lockable gate. A warning sign “Stop. Voltage” should be posted on the fence. The key to the fence door lock must be kept by the supervisor of the duty shift and issued against signature in the operational log.
18.27. In cases where permanently operating equipment of several enterprises is mounted on a support, the following order of work is determined.
Each of the tenant enterprises and the parent enterprise (organization), on the balance sheet of which the support is located, by their orders appoint persons responsible for carrying out work on the support with the right to issue orders for their implementation. The names of responsible persons and their positions must be officially reported to the parent organization.
The work order for carrying out work on the equipment located on the support is issued by the organization that owns this equipment. This organization is responsible for implementing all measures for the safe conduct of work.
Before carrying out work, the tenant enterprise must agree on the time, duration and conditions of the work with other tenant enterprises, and then obtain permission from the chief engineer of the parent organization. Regular work must be carried out according to a predetermined schedule, agreed upon with all tenant enterprises and approved by the chief engineer of the parent organization.
Permission to work on the support is carried out by the parent organization and the tenant company responsible for carrying out work on the equipment located on the support. At the same time, the parent organization records in the operational journal the name of the organization that issued the work order for work on the support, the number of the work order, the date of its issue, the duration and type of work, the name of the person who issued the work order.
If necessary, a representative of the parent organization indicates in the work order and logbook additional organizational and technical measures for the safe conduct of work on the support.
The magazine is signed by representatives of both enterprises (parent and tenant).
After completion of the work, the work order is closed in the usual manner with a mark and an entry about the completion of work in the journal.
The work order remains with the tenant company performing the work.
18.28. Antenna mast structures mounted on the roofs of technical buildings or other structures of this kind must be repaired taking into account the requirements of Chapter. 22 of these Rules.
18.29. When working on supports, if necessary, the antenna-mast operator must be equipped with means of communication: a receiving and transmitting radio station, a megaphone or a telephone.
18.30. Climbing onto supports on claws is permitted only with a support height of no more than 16 m. Climbing onto supports with a height of more than 16 m is permitted only in a cradle raised using a manual or electric (for support heights of more than 60 m) winch, in an elevator (if available) or along a specially equipped staircase.
18.31. The distances from the feeder wires to the ground surface, as well as various structures, must meet the requirements given in table. 5.
| Object name | Distance from feeder wires to object, m, not less | |
| for transmitting antennas | for receiving antennas | |
| Ground surface | 3,0 <*> | |
| Roadbed on the technical territory of the radio station | 4,5 | |
| Roadbed outside the technical territory of the radio station | 6 | 5,5 |
| Roof ridge | 2,5 | 1,5 |
| Rail head when a feeder crosses railways | 7,5 | |
| Elements of wooden and asbestos-cement feeder supports | 0,4 | 0,1 |
| Elements of reinforced concrete support | 0,5 <**> | 0,3 |
| Building walls | 0,8 | 0,3 |
| Branches of trees or bushes | 2,0 <***> | |
<**>With power over 250 kW - 0.8 m; at power below 5 kW - 0.3 m.
<***>Tree branches at any height above the feeder are not permitted.
18.32. During the lifting and work of the antenna-mast operator in the cradle, his working tool must be tied to the cradle structure.
Small tools and parts should be kept in the fitter's bag attached to the cradle.
It is prohibited to place tools or other objects on the support structures.
18.33. When performing work on antenna fields and in the premises of transmitting radio stations, safety measures must be taken to prevent injury to people, as well as fire or explosion of flammable substances from exposure to electric current induced by an electromagnetic field on resonating oscillatory circuits made of metal structures, ropes and wires.
Carrying out work in areas of possible danger must be coordinated with the operating schedule of technical equipment that is a source of induced radiation. electromagnetic field.
In areas of possible danger, the placement of explosive and fire hazardous materials and drilling and blasting operations should be prohibited.
The following methods should be used to protect personnel and equipment from induced voltages:
insulation (sectioning with insulators) of load-bearing ropes, in particular slings of assembly cranes;
grounding of metal structures and non-insulated (open) parts of structures, wire busbars;
bypass surgery electrical circuits capacitors;
connection to conductive circuits and circuits of detuning high-frequency circuits or elements;
shielding of equipment and structures.
Chapter 19. LIFTING DEVICES19.1. Lifting devices use winches with manual or electric drive. The winch must be installed on a horizontal surface and secured with a force of at least twice the maximum working load. Winches and outlet blocks must be attached to permanent (operational) or installation anchors. The use of old rope anchors is prohibited. To service several closely spaced supports, you can use mobile winches mounted on skids or wheels with appropriate attachment to the anchor pile.
19.2. The connection between the electric winch motor shaft and the drum shaft must be carried out using a gear or worm gear. The use of winches with belt and friction drives, friction and cam clutches is not permitted.
19.3. Permissible output of winch parts is determined in accordance with the passport and instructions for installation and operation of this mechanism.
19.4. The electric winch control panel should be installed at a distance of no more than 3 m from it. The connection of the remote control to the power supply line must be made through a connector that is fixed on the outside of the remote control, in an accessible place for emergency de-energization of the electric motor if the control button is “stuck”.
19.5. All non-current-carrying parts of electric winches must be grounded.
19.6. In cases where, when lifting with an electric winch, it is possible that the cradle intended for raising and lowering the antenna mast operator will touch the protruding parts of the antenna structure, and also when the speed of movement of the cradle exceeds 0.33 m/sec., it is necessary to install a guy rope or guides (flexible) or hard) and measures must be taken to protect the cradle from possible contact with protruding parts of the structure. Flexible guides can be installed horizontally, obliquely or vertically, and their ends must be securely fastened to the structures. It is necessary to prevent the cradle rope from touching the mast structures or antenna sheet.
19.7. The cradle, designed for raising and lowering masts onto single-barrel masts using a manual winch, can be made without a fence, from dry oak or pine boards with a thickness of 50 mm and dimensions of 600 x 300 mm. To attach the cradle, four holes are made in the corners of the board at a distance of at least 50 mm from the edges, through which a rope with a diameter of 7.7 to 8.7 mm is passed. The ends of the rope are woven under the board diagonally at a length of at least 200 mm and with a number of punches of at least 5.5 on each side. The length of the rope should be such that after braiding, two loops of about 1.2 m each remain above the board, which should be fastened with a straight knot to the lifting rope. The end of the lifting rope is secured with three clamps.
19.8. The coupling of the carriage with the cradle must exclude the possibility of spontaneous disengagement.
19.9. Each block, bracket or hook used for lifting people must be provided with a manufacturer's passport or test report in the prescribed manner.
19.10. It is prohibited: to use mounting blocks on bushings in a system with an electromechanical drive; use cradles made of timber to raise and lower masts using an electric winch; hang cables, hoses and other items from the cradle, except for tools and spare parts; install mechanisms and other objects that are not directly related to them near the winches of lifting devices.
19.11. The presence of working ropes of lifting devices must be excluded from the transmitting antennas during operation of the transmitters. In this case, a tarred rope must be passed through the block of the lifting device, intended for prompt reeving of the lifting rope. Antenna structures where installation and other types of work are carried out must be taken out of service for the entire period of these works.
19.12. Lifting devices and auxiliary devices for them, designed for lifting people and loads onto AMS supports, before putting into operation, as well as periodically every 12 months. (spring) must undergo a full technical examination by a commission of the organization operating these devices, consisting of the head of the antenna group and the antenna mast operator.
If during the inspection dangerous defects are revealed, the operation of the lifting device or auxiliary device is prohibited.
In the fall, lifting devices and auxiliary devices are inspected (without testing).
The results of the survey and inspection are recorded in a report approved by the technical director of the enterprise.
A lifting device for lifting people can only be put into operation after testing for 10 minutes. static load exceeding the load-carrying capacity of the device by 1.5 times, and dynamic load by 10%. Requirements for technical examination of winches for lifting loads are indicated in the table of Appendix 10.
19.13. Lifting devices must have:
periodic inspection log;
winch passports indicating the type, purpose, manufacturer, year of manufacture, serial number, load capacity, type of brakes, electric motor data, drum diameters, fundamental electrical diagram electrical wiring (for electric winches), etc.;
block passports;
installation drawing indicating the location of guys, lifting and guide ropes, as well as drawings for fastening blocks.
19.14. When lifting the antenna-mast operator onto the support, the manual winch must be operated by two trained or instructed workers. The electrically driven winch can be operated by one person. Persons servicing the winch are prohibited from leaving it when the antenna operator-mast operator is on the mast.
19.15. When the rope approaches the winch horizontally, it should be wound onto the drum of the electric winch from above, and from the bottom of the manual winch.
19.16. The electric drive of the winch must be controlled by continuously pressing one of the “Lifting” or “Downloading” buttons without locking. When the button is released, the electric drive should turn off.
19.17. Lifting or lowering must be stopped at the signal of any worker who notices the danger.
lift and lower people without commands from the cradle (the command to lift or lower loads and structures is given by only one responsible person);
repair or turn off the remote control while people are in the cradle;
stand over the rope going to the drum;
clean, lubricate or repair the winch while it is in operation;
lift more than 2 people in a cradle;
remove the hand winch ratchet wheel latch.
19.19. To avoid injury to operating personnel when objects fall from the cradle, the winch must be installed outside the danger zone. If this is not possible, then the work area near the winch must be protected from objects falling from above.
19.20. Before each rise to the support:
the lifting winch is inspected, checking the condition of the ratchet mechanism, gears, latch, attachment of the winch to the frame and the frame to the anchor;
inspect the hoisting rope during its reeving.
When inspecting, you should pay special attention to the condition of the lifting ropes, which can be damaged not only by corrosion and broken wires, but also by spark discharges.
19.21. When using hand winches, the speed of lifting and lowering the load is regulated only by changing the speed of rotation of the handle.
Currently, the service associated with the maintenance of antenna mast structures (AMS) is becoming increasingly popular and in demand. Any devices, equipment, relay stations, or cellular communication facilities require regular maintenance. Now there are a huge number of antenna mast structures on the territory of our state. All of them, sooner or later, need maintenance.
Today there are several typesapplication of antenna mast structures, which are most widespread in domestic spaces. Among them:
1. Metalmasts. This type of AMC includes special structures made of steel and aluminum. The guy system provides stability to such structures. They can be installed in various places. Such structures can be seen on the roofs of houses, administrative buildings, and engineering structures. They are often built on the surface of the ground. The material used in the manufacture of this type of AMC is steel corners. Angles made of aluminum can be used. You can find structures that are made of round steel rods or pipes with round section. They may vary in height. This altitude range is between 8 and 80 meters. As for the absolute height range of such structures, it is 35-80 meters above ground level.
2. Steeltowers. This type of antenna-mast structure includes special steel structures that are free-standing, rather than attached to roofs or using special guy wires. They have a high degree of rigidity. Its stability is ensured by the power circuit of the AMC itself. Compared to the first type, this type of structure is much more diverse. They can be lattice and combined, triangular or round, tetrahedral. You can often find structures of this kind that are made of steel pipes or angle steel. In most cases, the height of such structures above the ground is in the range from 40 to 70 meters.
3. Reinforced concretetowers. This type of antenna-mast structures includes special free-standing structures made of reinforced concrete. The basis of this type of structure is a special drain. This can be stock brand SK-26 or SK-22. A metal structure is built onto it to the required height. Maximum stability of the entire structure is ensured thanks to its power circuit. In height, such structures can reach 32 or even 40 meters above the ground.
Whatincluded in AMS maintenance
There are several types of AWS maintenance. Let's look at them using the example of a cellular operator's AMS.
- 1. Prophylacticinspection. This type includes several subtypes of maintenance:
Inspectioncontainers and the base of the AWS, fencing barriers of the territory. In other words, when it is carried out, specialists conduct a visual inspection of the reinforced concrete foundation, which is located above the surface of the earth. If necessary, the base and support plates on which the masts are installed are added. Here, external anchors, existing embedded parts, and containers are inspected to determine their condition.
The soil located near it, as well as the internal grillage, is inspected for subsidence, what condition is the blind area, soil envelope, and whether there is water inside the grillage.
In addition, the paintwork, its external cladding, and the container support frame are visually inspected. Each individual element of the structure must be inspected, what condition the fencing is in (this applies not only to paint and varnish coatings, but also to pillars, all kinds of welding joints, and the presence of lubricant in the hinges and locks located on the gate is checked).
All existing brackets are also subject to visual inspection; debris is removed not only from the fenced area, but also around it within a radius of one and a half meters. If necessary, the grass is mowed inside and outside the fence at the above distance.
Carrying outAMS inspection. It is mandatory to check the condition of the supporting connections, abutting and flanged elements, the connection of all chords (all elements must be pressed tightly against each other, there should not be even the slightest gap between them), the condition of the bolts and how securely they are tightened.
After this, the condition of the lattice of the support shaft of the structure is checked. Are there any gaps between the fastening units (between the braces and chords, between the struts and platform elements, antenna pipe supports and diaphragms...) and the gussets.
It is mandatory to check the welded connecting seams, heat-affected zones on the barrel elements, what condition they are in, whether there are cracks or other damage.
The visual inspection also includes a visual inspection of the existing threaded connections on each element of the barrel support grid to ensure its compliance with the requirements. Technological sites are also subject to visual inspection.
In addition to them, fences and all existing hatches are inspected and the serviceability of safety devices (fences and safety chute..) and fastenings is checked. What is the condition of the paint and varnish coating, and whether the applied daytime marking of the AMC barrel has become unusable.
Subject to separate inspection systemlight fence. Here the condition of the light fence equipment and its operability are checked. All available controller channels, all possible outputs are checked, whether alarm loops are connected. All available information must be checked LED bulbs, their condition, whether they require replacement.
Separately, the condition and tightness of the POM lamps, distribution boxes are visually inspected, whether there is a drainage hole and the tightness of the boxes, and the condition of the grounding cable armor. In addition, the condition of the COM cables, their integrity, and the grounding conductor armor are checked.
Examinationquality of grounding and lightning protection. When carrying out these works, lightning protection grounding is subject to visual inspection. The presence or absence of damage on the lightning protection strips, whether there are any defects in the welded joints, and the degree of corrosion are determined. All elements of equipment included in the grounding system and AMS lightning protection devices are also subject to inspection here.
InspectionAMS. This subtype of preventive inspection includes checking the completeness, condition of amplifiers and antennas, how reliable the mounts are and whether they require replacement.
Coaxial cables are separately inspected and the condition of their attachments to metal structures is in place. Are there anti-ice visors (they must be on horizontal sections of the cable growth and located at least 1/3 the height of the structure itself), what condition are they in?
All existing insulating cables must also be checked to see if they are damaged, and if there is insulation in the places where they are connected to amplifiers and antennas. The condition of the connections between the cable shield and the grounding device and the condition of the insulation are checked separately. Are there markings on the antennas themselves and all cables? The sealing condition of the cable entry is also checked here. It is checked whether graphite lubricant is applied in the places where the grounding devices are connected to the ground electrodes, whether the grounding cables are securely connected to the grounding amplifiers, the integrity of the entire network and the connection of the existing RPC units.
- 2. Carrying outmeasurements is another type of AWS service. With this type of maintenance, the conformity of the position of the shaft with the structure, in other words its geodetic position, is checked. Are the supporting parts of the AMS base causing settlement (the settlement is checked not only relative to each other, but also relative to the supporting leveled slabs). Measurements are taken of the straightness of the belts, and what electrical resistance the insulating cables responsible for the light fence have. Integrity of the lightning protection grounding circuit and their electrical resistance.
- 3. Carrying outaudits. This type of maintenance includes work related to checking the condition of the ground part of the base of the antenna-mast structure, whether there is a need to add support to the base plates, whether they have cracks and cavities, chips and signs of erosion, and the condition of the waterproofing layer. If necessary, all identified deficiencies are eliminated. In other words, this type includes all of the above work, which are indicated in the preventive inspection. And this is an inspection of: fences and containers, the base of the AWS; work related to the inspection of the antenna mast structure itself and its trunks; grounding system and lightning protection system; antenna-feeder devices; light fencing system for antenna-mast connection.
Additionaltechnical and preventive work on antenna mast structures.
As a separate subspecies, we can distinguish work that is related to preventive and maintenance of automated systems. In other words, this subspecies can be called as emergency- restoration work. They are performed when the need arises:
- when the support trunk deviates from the permissible verticality and it is necessary to restore it to the desired position;
- the metal structure tower requires painting;
- when it is necessary to restore the lightning protection contours of a tower. This includes work on restoring the lightning protection circuit in electrical connections, the need to establish additional connections using special bolts on the AMS, if there is a need to replace existing bolted connections with welded ones, on lightning protection strips it is necessary to remove the remnants of the old coating, stripping, painting lightning protection strips;
- On metal structures, towers require replacement of hardware. This may be the installation of lock nuts or high-strength bolts that have exhausted their service life and need to be replaced;
- a protective casing must be installed or replaced on the cable shelf;
- the tower lighting system requires repair or it is necessary to additionally install anti-vandal devices;
- the container equipment room requires repairs or it is necessary to dismantle old equipment and install new one;
- installation of injectors or LNA;
- it is necessary to carry out measurements of the antenna-feeder path...
Occupational health and safety when working on antenna mast structures (AMS).
1. General requirements security.
1.1. Workers who have passed:
Preliminary medical examination;
Introductory safety briefing;
Safety briefing directly at the workplace, which is also carried out when the conditions and nature of work change or when a worker violates safety rules.
1.2. Workers who have undergone training and received a certificate for the right to carry out work are allowed to carry out independent work on the installation of structures.
1.3. Individuals who are at least 18 years old, have passed a medical examination, and have at least one year of experience in steeplejacking are allowed to perform independent steeplejack work. Workers admitted to steeplejack work for the first time must work for one year under the direct supervision of experienced workers appointed by order of the head of the enterprise.
1.4. The installer is obliged:
Comply with internal labor regulations;
Use personal and collective protective equipment while at the construction and installation site, use a safety helmet;
Comply with the requirements of safety signs (warning, prohibiting, indicative) and ensure that hazardous areas are fenced off at workplaces;
Do not follow orders if they contradict safety and industrial sanitation rules;
Provide first aid to the injured person at work, take measures to eliminate violations of safety regulations;
Remember personal responsibility for compliance with safety regulations and for the safety of fellow workers.
1.5. The installer, in accordance with the assigned category, must know:
Types and purpose of rigging equipment, slings and lifting devices; installation signaling rules;
Types of parts of reinforced concrete, metal, asbestos-cement and wooden structures;
Types of installation equipment and devices;
Methods of assembly and installation of structures from individual elements;
Methods of slinging and unslinging mounted structures;
Methods for checking the density of welds;
Devices and methods of belt fastening of structures;
Rules for transportation and storage of structures.
1.6. Workers are provided with personal protective equipment (working clothing, safety shoes and safety devices) in accordance with standard industry standards and the nature of the work performed.
1.7. In accordance with the nature of the work performed, installers are provided with working means of small-scale mechanization (winches, jacks, blocks, etc.), lifting devices and containers, lifting equipment, as well as the necessary hand and mechanized tools.
1.8. At night, lighting of workplaces, driveways and passages is provided.
1.9. Workplaces are provided with tested inventory fencing and devices for working at height (scaffolding, scaffolding, stepladders, ladders, cradles, etc.), installed in accordance with the work project.
1.10. The perimeter of a structure under construction during the movement, installation and fastening of structures is indicated by clearly visible warning (prohibitory) signs or inscriptions of an area dangerous for people. The danger zone when installing mast and tower structures is considered to be a circle with a radius of 1/3 of the total height of the structure being installed.
1.11. Workplaces located at a height of more than 1 m above the ground must be securely fenced.
1.12. Before starting work, the installer must understand the procedure for unloading structures intended for installation, as well as their temporary storage in on-site areas before installation.
1.13. Installation of metal masts and towers can be carried out:
a) the rotation method (assembling the entire support in a horizontal position on the ground, followed by rotation around the hinge to the design position using a “falling” boom);
b) by the extension method (using a self-lifting crane or a device moving along the support shaft it installs);
c) by growing method (sections, starting from the top, are mounted in a special portal and pulled out using pulleys); d) a combined method (for example, the lower part of the support - by extension, the upper part - by rotation, etc.).
1.14. Installation and installation of wooden masts with a height of 12 to 52 m in the design position should be carried out using the “falling” boom method.
1.15. Installation and installation of asbestos-cement masts in the design position should be carried out using the “falling” boom method; the deviation of the mast trunk from a straight line during the lifting process should not exceed 1:1000 of its height.
1.16. Installation and installation of reinforced concrete masts in the design position must be carried out using a crane (vehicle or crawler).
2. Safety requirements before starting work
Necessary:
2.1. Receive instructions from the master on safe ways to complete the assigned task.
2.2. Wear the required protective clothing, safety shoes and safety equipment.
2.3. Wear a protective helmet. It is prohibited to work without a safety helmet.
2.4. When working at height, the installer must put on a safety belt, having first ensured that it is in good working order, has a number on it and the date of the next or next test, carried out every 6 months.
2.5. Take the working tool you need to do the job and put it in your bag.
2.6. Secure with a safety belt in the places indicated by the technician.
2.7. Warn those working below so that everyone leaves the danger zone.
2.8. Work on installation of structures must be carried out in accordance with the work project.
2.10. At the installation site, a procedure must be established for the exchange of conventional signals between the person in charge of the lift and the crane driver or winch operator, as well as the workers on the guy ropes. All signals are given by only one person - the foreman of the installation team, the team leader or the rigger. The "Stop" signal is given by any employee who notices the danger. In especially critical cases (when lifting structures using complex rigging using the rotation method, when sliding structures, when lifting them with more than one mechanism, etc.), the signal must be given by the master.
2.11. Lifting elements of prefabricated structures should be done smoothly, without jerking, turning and rotating lifted elements using guy ropes
3. Safety requirements during operation
3.1. Perform only the work that is assigned by the foreman and for which instructions were provided at the workplace.
3.2. While lifting and working on the mast, it is not allowed to unfasten the carabiner of the safety belt chain.
3.3. The installer must ensure that the movement of the steel ropes during lifting and lowering is free. In cases where it is possible for the cradle to touch the protruding parts of the antenna structure, vertical rigid or flexible guides must be installed.
3.4. Cradles from which work is not carried out must be lowered to the ground.
3.5. During lifting and work, the tool must be tied to the cradle, small tools and parts must be in the fitter's bag attached to the cradle.
3.6. While lifting the cradles, only the workers performing the lifting are allowed to remain in them.
3.7. It is allowed to detach from the cradle only after attaching it to the support structure.
3.8. To ensure the safety of crossing the guy ropes, it is necessary to use a safety belt equipped with two chains.
3.9. When crossing guy lines, unfastening the carabiner of one of the chains is permitted only after the other chain is securely fastened to the mast structure or a rope is securely stretched along the truss or crossbar to secure the carabiner.
3.10. It is permitted to release antenna elements from load-handling devices only after the elements have been aligned and securely fastened in accordance with the design.
3.11. During lifting and installation of antennas, it is necessary to carefully observe the structure being lifted, rigging, braces and anchors.
3.12. Check the rigging, reeving of mounting cables and fastening of mounting devices under load by test lifting the antenna structures to a height of 20-30 cm with a holding time of 10-15 minutes.
3.13. If any deficiencies are found in the fastening, lower the structure and eliminate the defects.
3.14. Reception of the supplied structure should be performed at the remote antenna platform only after the structures have been lowered to a level of no more than 30 cm above the installation site; from this position, guide it to the design position.
3.15. It is not allowed to tighten the mounted antennas before lifting or lowering, or to lift structures and antennas that are frozen or buried in the ground.
3.16. It is not allowed to leave raised and unsecured antenna elements hanging after the end of working hours.
3.17. It is prohibited to carry out work on live antennas or feeder lines.
3.18. At radio centers where several transmitters operate simultaneously, work on supports, antennas and feeders is possible only after portable grounding connections have been installed to ensure minimal induction of EMF at the workplace.
3.19. Moving along the antenna field, where it is possible to induce EMF, should follow the routes established by the administration of the radio enterprise.
3.20. The communications installer/antenna operator is prohibited from:
a) walk on structures not intended for this purpose;
b) throw various objects from a height;
c) leave tools and hardware on structures;
d) lift antennas and structures whose weight exceeds the lifting capacity of the crane (winch);
e) guide the lashing ropes (chains) with hammer or crowbar blows;
f) hold with your hands or pliers the mooring ropes (chains) sliding off the antennas when lifting them; if the ropes slip, the installer must immediately give a signal to lower the antenna to the ground and only then correct the bandage;
g) be on structures while they are being lifted;
h) be under the raised antenna and structure, as well as in close proximity to them;
i) produce welding work while in the cradle.
3.21. When working together with welders, communication antenna installers must wear protective dark glasses.
3.22. It is prohibited to climb the mast and carry out any work during icy conditions, fog, heavy snowfall and rain, excluding visibility within the work front, at a wind speed of 12 m/s or more, as well as during a thunderstorm.
3.23. When dismantling antennas, the requirements for installation work must be met.
4. Safety requirements after completion of work
4.1. Clean the work area and put the tools in a drawer or bag.
4.2. Place the instrument for storage in a specially designated place.
4.3. Report any problems you notice to the technician.
TECHNICAL REQUIREMENTS
Definitions:
Mandatory requirements– these are requirements, if not fulfilled in full or in part, the Participant may be removed from the Competition by decision of the Competition Commission of the Capital Branch.
AMS– antenna-mast structures (towers, masts, poles).
New contractor– a contracting organization that has not previously provided services for the construction of automated systems in the Capital Branch
The Bid must be prepared by the Bidder in accordance with the requirements specified in the following sections.
Section 1. General requirements
The documents and information requested in this section must be provided in the Bid in the section “Main package of documents”
1.1. Availability of licenses and permits
Within the framework of this Competition, proposals from Contracting Organizations that have all the necessary licenses and permits required for the construction of antenna mast structures are considered. In addition, the Competition Participant guarantees that all materials and solutions used by him in the construction of the AWS have the necessary certificates for their use in the Russian Federation.
1.2. Technical description of AMS
As part of the documents submitted for participation in the Competition, the Competition Participant must provide a technical description of the AMS and a preliminary design (in accordance with the Customer’s Technical Specifications) with its main technical characteristics, if necessary, copies of certified Technical Specifications and valid certificates.
All of the above documents related to the technical description of the equipment must be provided only on electronic media.
1.3 Mandatory requirements for competition participants:
1.3.1 period of work on this market is at least 12 (twelve) months
1.3.2 positive experience of working with the Stolichny branch (for existing contractors)/presence of positive feedback from other telecom operators on previously constructed facilities (for new contractors)
1.3.3 satisfactory financial condition companies (conclusions on this item are made based on the analysis of financial and tax statements for last years, including quarterly for the current year)
1.3.4 agreement to work according to the payment scheme specified in clause 6.2 “Invitation to participate in the competition”
1.4 Warranty period for work performed
The tender participant must confirm that he is ready to provide services for the design and construction of AWS on the following conditions:
Warranty period for work performed is at least 24 months from the date of final acceptance of the AWS by the Customer.
Warranty period for painting metal structures is at least 5 (five years) from the date of final acceptance of the AWS by the Customer.
After completion of the installation of the AMS and before carrying out work on the installation of the AFU, the Customer, at the request of the Construction Contractor, carries out technical acceptance of the AMS.
Section 2. Financial requirements.
Documents and information requested in this section must be provided in the competitive proposal in the “Financial part” section
2.1. Requirements for price tables and cost calculations for work
Price tables for work should be complete and reflect all types of work that make up the cost of consolidated items in Table 1 of Form 2.2.
The price list must be provided both on paper and in Excel format.
Section 3. Initial data for preparing a competitive proposal
3.1. The participant in the competition is invited to make a Bid proposal, in which he will have to offer the cost of constructing the AMS in accordance with the Customer’s Technical Specifications.
3.2. Based on the results of the Competition, at least two Contracting Organizations can be selected for the construction of an automatic station in the Capital Branch.
If, based on the results of the Competition, a New Contractor is selected, then the decision on the quotas allocated to it for the construction of the AMS will be made after the Customer accepts the first completed construction project.
Section 4. Methodology for evaluating competitive proposals and summing up the results of the Competition
4.1. The evaluation of the proposals of the Competition Participants who have fulfilled all the Mandatory Requirements and other conditions of the Invitation will consist of two parts:
· Evaluation of the Main package of documents;
· Evaluation of the financial part of the proposal.
4.2. Evaluation of the Basic Document Package will be carried out in accordance with the terms of the Competition and the requirements of the Customer.
When evaluating the competitive proposals of the Competition Participants, the financial component of the competitive proposal, the quality indicator and the construction period are taken into account. The evaluation of commercial proposals of the Competition Participants who have fulfilled all Mandatory requirements and other conditions of the Competition is calculated according to the formula:
|
R = |
WITH MIN |
x 70 + |
K SUPPORT |
T MIN |
x 10 |
|
|
WITH SUPPORT |
K MAX |
T SUPPORT |
|
R |
The final result of the evaluation of the Bid; |
|
WITH MIN |
Minimum cost of design and construction work from all proposals received; |
|
WITH SUBDR |
The cost of design and construction work for the evaluated bidder; |
|
K MAX |
The maximum score for assessing the quality of construction of all Competition Participants; |
|
K SUBDR |
Assessment of the quality of construction directly by the Competition Participant (assessed by the Competition Committee on a 3-point scale). |
|
T MIN |
Minimum period for construction of the facility (performance of work) from all proposals received; |
|
T SUBDR |
Duration of construction of the facility (performance of work) of the evaluated Tender Participant. |
Section 5. Procedure after completion of the Competition
5.1. Based on the results of the comparative analysis and evaluation of the commercial proposals of the Competition Participants, the competition commission will make a decision on the winner of the Competition (1st place), as well as on the Competition Participants who took 2nd and subsequent places. An agreement will be signed with the winner of the Competition to provide a guaranteed quota of orders for the construction of nuclear power plants, specified in clause 3.3.1. If among the Participants of the Competition who took places from 1 to 2, there is at least one new Contracting Organization, then the Customer will sign with the Participants of the Competition who took places 2 and 3, Framework Agreements on the provision of a non-guaranteed quota of orders for the construction of AMS determined for them . If there are no new suppliers among the two best proposals, the Customer will sign a Framework Agreement with a non-guaranteed quota of orders for the construction of the AMS only with the Bidder who took second place.
5.2. After signing the Framework Agreements and Agreements with the winner of the Competition, the Customer will carry out orders for the construction of AMS at the prices specified in the Agreements.
Section 6. Technical specifications for AWS
6.1 Technical specifications for the construction of a tower 70 meters high.
Radiotelephone (RTF) antennas of the Kathrein type - 12 pieces: 6 pieces at 70 meters and 6 pieces at 67.5 meters at technological sites. RTF antennas of the same range are placed with a vertical gap of at least 0.5 m between them. The RTF antennas are fastened with standard clamps to the pipe. The overall dimensions of the antennas are: 2386x292x192. The weight of one antenna is 12.5 kg;
Cable to RTF antennas:
– 12 pieces, Ø 25 mm – two for each antenna. The weight of a linear meter of cable is 0.7 kg;
– 12 pieces, Ø 50 mm – two for each antenna. The weight of a linear meter of cable is 1.16 kg;
- Ø 1.2 m – 3 pieces with opening centers at no lower than 70 meters and 2 pieces with opening centers at no lower than 65 meters.
- Ø 0.6 m – 3 pieces with opening centers at no lower than 51 meters.
3. AMS equipment.
The AWS must have stepladders equipped with basket fencing and transition platforms, as well as technological platforms for servicing RTF and RRL antennas, with distances between them not exceeding the required current rules on safety precautions. At the transition platforms and at the antenna service areas, provide hatches with the possibility of fixing them in open position. The flooring of platforms and hatches must have drainage holes Æ 20 mm, with a pitch of 200´200 mm, or made of expanded metal. At the level of the lower traffic light platform of the tower, provide anti-vandal fencing to prevent unauthorized access to the COM equipment. The lower transition platform of the tower, as well as the lower traffic light platform, must be equipped with hatches that can be locked with a padlock, with a device to protect the lock from burglary.
5. To protect against direct lightning strikes, structures for lightning protection and grounding systems must be provided. To ensure reliable electrical contact of lightning rods and equipment located on the tower with a grounding loop, provide welded joints in the form of jumpers on flanges, platform decks, grounding bars of HF cables and COM distribution boxes. Obstruction lights must be installed on the aircraft in accordance with the requirements of REGA RF-94 “Manual for the operation of civil airfields of the Russian Federation”. When installing an AMS light fence, you must be guided by the approved Technical Requirements for the design and installation of an AMS light fence. LED lamps must be used (type LC18x5 “Perm”, supply voltage up to 70 V). A COM light control device is installed in the BS hardware room.
6. AMC structures must be made in accordance with the requirements of current regulatory and technical documents. Foundations must have waterproofing surfaces, including exposed parts. Provide for the installation of anti-vandal nut clamps on foundation anchor studs.
The AWS must be designed for external influences characteristic of the climate zones where the AWS is located, for loads from its own weight, the weight of equipment and for installation loads in accordance with the standards (SNiP 02.01.07-85 “Loads and Impacts”). The angular movements of the AWS at the level of placement of the RRL antennas at standard winds should not exceed 30¢ in azimuth and elevation.
8. In accordance with SNiP 2.03.11-85 “Protection of building structures from corrosion”, the warranty service life of the AMC paint and varnish coating is 5 (five) years. It is recommended to paint AMC with preliminary priming in at least two layers, preferably with paints and varnishes made in Finland (Tikkurila, Teknos, etc.). When performing work to protect metal structures from corrosion, the requirements of SNiP 3704.03-85 “Protection of building structures and structures from corrosion. Rules for the production and acceptance of work”, GOST 12.3.016-87 “Anti-corrosion work. Safety requirements” and GOST 9.402-80 “Paint and varnish coatings. Preparation of metal surfaces before painting or similar, by prior agreement with the Customer.
6.2 Technical specifications for the construction of a tower 50 meters high.
1. The AWS is intended to accommodate antenna equipment for cellular radiotelephone communications, antennas for radio relay anchor lines in wind region I.
2. Basics technological equipment, posted on AWS:
Radiotelephone (RTF) antennas of the Kathrein type - 12 pieces: 6 pieces at 48.5 meters and 6 pieces at 44.5 meters at technological sites. RTF antennas of the same range are placed with a vertical gap of at least 0.5 m between them. The RTF antennas are fastened with standard clamps to the pipe. The overall dimensions of the antennas are: 2386x292x192. The weight of one antenna is 12.5 kg;
Cable to RTF antennas – 24 pieces, Ø 25 mm – two for each antenna. The weight of a linear meter of cable is 0.7 kg;
Radio relay (RRL) antennas:
- Ø 1.2 m – 3 pieces with opening centers at no lower than 49.5 meters and 2 pieces with opening centers at no lower than 44 meters.
- Ø 0.6 m – 3 pieces with opening centers at no lower than 40 meters.
The RRL antennas are fastened with standard clamps to the pipe stand;
Cable to RRL antennas – 8 pieces Ø 16 mm, one for each antenna.
3. AMS equipment.
The AWS must have stepladders equipped with basket fencing and transition platforms, as well as technological platforms for servicing RTF and RRL antennas, with distances between them not exceeding those required by current safety regulations. At the transition platforms and antenna service areas, provide hatches with the ability to fix them in the open position. The flooring of platforms and hatches must have drainage holes Æ 20 mm, with a pitch of 200´200 mm, or made of expanded metal. At the level of the lower traffic light platform of the tower, provide anti-vandal fencing to prevent unauthorized access to the COM equipment. The lower transition platform of the tower, as well as the lower traffic light platform, must be equipped with hatches that can be locked with a padlock, with a device to protect the lock from burglary.
4. A cable tray should be provided next to the step ladder. The cable fastening step is no more than 1.0 m. The rigidity of the tray must be ensured. In horizontal sections, provide protection for feeders from ice.
5. To protect against direct lightning strikes, structures for lightning protection and grounding systems must be provided. To ensure reliable electrical contact of lightning rods and equipment located on the tower with the grounding loop, provide welded connections in the form of jumpers on flanges, platform decks, HF cable grounding bars and COM distribution boxes. Obstruction lights must be installed on the aircraft in accordance with the requirements of REGA RF-94 “Manual for the operation of civil airfields of the Russian Federation”. When installing an AMS light fence, you must be guided by the approved Technical Requirements for the design and installation of an AMS light fence. LED lamps must be used (type LC18x5 “Perm”, supply voltage up to 70 V). If possible, a COM light control device is installed in the BS hardware room.
6. AMC structures must be made in accordance with the requirements of current regulatory and technical documents. Foundations must have waterproofing surfaces, including exposed parts. Provide for the installation of anti-vandal nut clamps on foundation anchor studs.
7. Requirements for strength, stability and deformability.
6.3 Technical specifications for the construction of a pillar 45 meters high.
1. The AWS is intended to accommodate antenna equipment for cellular radiotelephone communications, antennas for radio relay anchor lines in wind region I.
2. Main technological equipment located on the AWS:
· radiotelephone (RTF) antennas of the Kathrein type – 6 pcs. at a level not lower than 39 meters. The overall dimensions of the antennas are: 2386x292x192. The weight of one antenna is 12.5 kg;
· radio relay (RRL) antennas, Ø 0.6 m – 3 pcs. with opening centers at no lower than 45 meters.
3. The AWS must have stepladders inside the AWS trunk, equipped with transition platforms, as well as a technological platform for servicing RTF and RRL antennas, with distances between them not exceeding those required by current safety regulations. The flooring of platforms and hatches must have drainage holes Æ 20 mm, with a pitch of 200´200 mm, or made of expanded metal. Provide the possibility of locking front door at the base of the AMC with a padlock and provide anti-vandal protection to the lock (weld steel pipe around the lugs). It is also necessary to provide for the possibility of installing a mortise lock on the door.
4. A cable tray should be provided next to the step ladder. The cable fastening step is no more than 1.0 m. The rigidity of the tray must be ensured. In horizontal sections, provide protection for feeders from ice.
5. To protect against direct lightning strikes, structures for lightning protection and grounding systems must be provided. To ensure reliable electrical contact of lightning rods and equipment located on the AWS with the grounding loop, provide welded connections in the form of jumpers on the flanges, platform decks, and grounding bars of HF cables. Perform lighting inside the AMS trunk and measures for its natural ventilation. If necessary, obstacle lights must be installed on the aircraft in accordance with the requirements of REGA RF-94 “Operation Manual for Civil Airfields of the Russian Federation”. When installing an AMS light fence, you must be guided by the approved Technical Requirements for the design and installation of an AMS light fence. LED lamps must be used (type LC18x5 “Perm”, supply voltage up to 70 V). If possible, a COM light control device is installed in the BS hardware room.
7. Requirements for strength, stability and deformability.
The AWS must be designed for external influences characteristic of the climate zones where the AWS is located, for loads from its own weight, the weight of equipment and for installation loads in accordance with the standards (SNiP 02.01.07-85 “Loads and Impacts”). The angular movements of the AWS at the level of placement of the RRL antennas at standard winds should not exceed 30¢ in azimuth and elevation.
8. In accordance with SNiP 2.03.11-85 “Protection of building structures from corrosion”, the warranty service life of the AMC paint and varnish coating is 5 (five) years. It is recommended to paint AMC with preliminary priming in at least two layers, preferably with paints and varnishes made in Finland (Tikkurila, Teknos, etc.). When performing work to protect metal structures from corrosion, the requirements of SNiP 3704.03-85 “Protection of building structures and structures from corrosion. Rules for the production and acceptance of work”, GOST 12.3.016-87 “Anti-corrosion work. Safety requirements” and GOST 9.402-80 “Paint and varnish coatings. Preparation of metal surfaces before painting or similar, by prior agreement with the Customer.
6.4 Technical specifications for the construction of a pillar 30 meters high.
1. The AWS is intended to accommodate antenna equipment for cellular radiotelephone communications, antennas for radio relay anchor lines in wind region I.
2. Main technological equipment located on the AWS:
· radiotelephone (RTF) antennas of the Kathrein type – 6 pcs. at the 30-meter mark. The overall dimensions of the antennas are: 2386x292x192. The weight of one antenna is 12.5 kg;
· RTF antennas are fastened using standard clamps to the pipe supports;
· cable to RTF antennas – 12 pieces, Ø 18 mm – two for each antenna. The weight of a linear meter of cable is 0.4 kg;
· radio relay (RRL) antennas, Ø 0.6 m – 2 pcs. with opening centers at no lower than 28 meters.
· RRL antennas are fastened with standard clamps to the pipe stand;
· cable to RRL antennas – 2 pieces Ø 16 mm, one for each antenna.
4. A cable tray should be provided next to the step ladder. The cable fastening step is no more than 1.0 m. The rigidity of the tray must be ensured. In horizontal sections, provide protection for feeders from ice.
5. To protect against direct lightning strikes, structures for lightning protection and grounding systems must be provided. To ensure reliable electrical contact of lightning rods and equipment located on the AWS with the grounding loop, provide welded connections in the form of jumpers on the flanges, platform decks, and grounding bars of HF cables. Perform lighting inside the AMS trunk and measures for its natural ventilation. If necessary, obstacle lights must be installed on the aircraft in accordance with the requirements of REGA RF-94 “Operation Manual for Civil Airfields of the Russian Federation”. When installing an AMS light fence, you must be guided by the approved Technical Requirements for the design and installation of an AMS light fence. LED lamps must be used (type LC18x5 “Perm”, supply voltage up to 70 V). If possible, a COM light control device is installed in the BS hardware room.
6. AMC structures must be made in accordance with the requirements of current regulatory and technical documents. The foundation must have waterproofing surfaces, including exposed parts. Provide for the installation of anti-vandal nut clamps on foundation anchor studs.
7. Requirements for strength, stability and deformability.
The AWS must be designed for external influences characteristic of the climate zones where the AWS is located, for loads from its own weight, the weight of equipment and for installation loads in accordance with the standards (SNiP 02.01.07-85 “Loads and Impacts”). The angular movements of the AWS at the level of placement of the RRL antennas at standard winds should not exceed 30¢ in azimuth and elevation.
8. In accordance with SNiP 2.03.11-85 “Protection of building structures from corrosion”, the warranty service life of the AMC paint and varnish coating is 5 (five) years. It is recommended to paint AMC with preliminary priming in at least two layers, preferably with paints and varnishes made in Finland (Tikkurila, Teknos, etc.). When performing work to protect metal structures from corrosion, the requirements of SNiP 3704.03-85 “Protection of building structures and structures from corrosion. Rules for the production and acceptance of work”, GOST 12.3.016-87 “Anti-corrosion work. Safety requirements” and GOST 9.402-80 “Paint and varnish coatings. Preparation of metal surfaces before painting or similar, by prior agreement with the Customer.
6.5 Technical specifications for the construction of a reinforced concrete pillar 27 meters high.
1. The AWS is intended to accommodate antenna equipment for cellular radiotelephone communications, antennas for radio relay anchor lines in wind region I.
2. Main technological equipment located on the AWS:
· radiotelephone (RTF) antennas of the Kathrein type – 6 pcs. at around 27 meters. The overall dimensions of the antennas are: 2386x292x192. The weight of one antenna is 12.5 kg;
· RTF antennas are fastened using standard clamps to the pipe supports;
· cable to RTF antennas – 12 pieces, Ø 18 mm – two for each antenna. The weight of a linear meter of cable is 0.4 kg;
· radio relay (RRL) antennas, Ø 0.6 m – 2 pcs. with opening centers at no lower than 25 meters.
· RRL antennas are fastened with standard clamps to the pipe stand;
· cable to RRL antennas – 2 pieces Ø 16 mm, one for each antenna.
3. The AWS must have stepladders outside the AWS trunk, as well as a technological platform for servicing RTF and RRL antennas, with distances between them not exceeding those required by current safety regulations. The flooring of platforms and hatches must have drainage holes Æ 20 mm, with a pitch of 200´200 mm, or made of expanded metal.
4. A cable tray should be provided next to the step ladder. The cable fastening step is no more than 1.0 m. The rigidity of the tray must be ensured. In horizontal sections, provide protection for feeders from ice.
5. To protect against direct lightning strikes, structures for lightning protection and grounding systems must be provided. To ensure reliable electrical contact of lightning rods and equipment located on the AWS with the grounding loop, provide welded connections in the form of jumpers on the flanges, platform decks, and grounding bars of HF cables. If necessary, obstacle lights must be installed on the aircraft in accordance with the requirements of REGA RF-94 “Operation Manual for Civil Airfields of the Russian Federation”. When installing an AMS light fence, you must be guided by the approved Technical Requirements for the design and installation of an AMS light fence. LED lamps must be used (type LC18x5 “Perm”, supply voltage up to 70 V). If possible, a COM light control device is installed in the BS hardware room.
6. AMC structures must be made in accordance with the requirements of current regulatory and technical documents. The foundation must have waterproofing surfaces, including exposed parts. Provide for the installation of anti-vandal nut clamps on foundation anchor studs.
7. Requirements for strength, stability and deformability.
The AWS must be designed for external influences characteristic of the climate zones where the AWS is located, for loads from its own weight, the weight of equipment and for installation loads in accordance with the standards (SNiP 02.01.07-85 “Loads and Impacts”). The angular movements of the AWS at the level of placement of the RRL antennas at standard winds should not exceed 30¢ in azimuth and elevation.
8. In accordance with SNiP 2.03.11-85 “Protection of building structures from corrosion”, the warranty service life of the AMC paint and varnish coating is 5 (five) years. It is recommended to paint AMC with preliminary priming in at least two layers, preferably with paints and varnishes made in Finland (Tikkurila, Teknos, etc.). When performing work to protect metal structures from corrosion, the requirements of SNiP 3704.03-85 “Protection of building structures and structures from corrosion. Rules for the production and acceptance of work”, GOST 12.3.016-87 “Anti-corrosion work. Safety requirements” and GOST 9.402-80 “Paint and varnish coatings. Preparation of metal surfaces before painting or similar, by prior agreement with the Customer.
