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30m RDV Specs .
HOI/ASTE is pleased to introduce Truck with 30m telescopic mast. This unit is a Vehicle equipped with equipment shelter, generator and 30m meters height telescopic mast. The Unit can be used in any telecommunication services such as:
 
 
- Occasionally seasonal as football matches, conferences, over capacity locations, etc.
- Temporary solution while critical sites are under construction.
- Disaster recovery as a back up for any telecommunication system, which can be on air in few hours.
 
A) General Description
Mast mounted on trailer consists of:
 
 
1) The Supporting structure
is a vehicle. The telescopic mast, which is fixed to the frame, is anchored to the container by 4 sets of guys
 
2) Mast climbing facilities
One of mast faces will be provided with step rungs to facilitate the mast climbing.
 
 
3) Safety
Climber should wear the safety belt and secure him self at any stop.
 
4) Rigging of antennas & feeder
Antenna mounts are provided with the mast to facilitate mounting of either RF or MW antennas. Antenna feeders will be run through clicks attached to mast using C-CLAMPS.
 
5) The Antenna mount
in Aluminium, consists of a 3m high pipe mount for 6 panel antennas & 2-0.6m diameter MW dishes.
 
B) Masts
 
 
1) General Design Criteria
Mast is designed based on TIA-222-G-2006 with respect to the following:
• Design Standard
• Wind Speed
• Materials
• Slenderness Ratio & Members Thickness
• Painting Requirements
• Warning Light Requirements
• Lightning Protection
 
2) These criteria are further explained as follows:
• Design of masts is according to TIA -222-G-2006
• Wind speed for survival is 3-second Gust speed 160 km/hr. Wind speed for operational condition
  is 3-second Gust speed 120 km/hr. Maximum deflection = 0.5 degrees at the operational wind speed.
• Materials- Masts guyed fabricated according to approved drawings including angles, tubes, plates,
  all types of fasteners, Antenna mounts frames. Materials specification shall be
 
a. Mild steel according to BS-EN10025 grd. S275JO for mast pipe grd. (S235JR,or material
  according to DIN 17100 for grd ST37 )for frame bracing.
b. Bolts according to DIN 267 grd. 8.8, ASTM A325 or equivalent.
c. Galvanization according to BS729, ASTM A153 & A123, or equivalent to a minimum thickness
  of 120 microns.
• Maximum allowable slenderness ratio (l/r) for tower members shall be:
  (I) Main members (legs) = 150
(ii) Bracing and main horizontals = 200
(iii) Redundant = 250
Where l = effective length of members
• Painting and obstruction lights will be applied according to ICAO requirement
• Masts will be supplied with Lightning Protection System.
 
3) Masts Design Load
Self Support masts- 18 meter height . Design Load
  a. SIX GSM antennas.
b. Two each 600 mm diameter microwave dishes.
c. RF Feeders
 
4) Hot Dip Galvanization Procedures
HOI/ASTE would like to briefly outline the procedures which to be followed in Galvanization Plant to Ensure Quality According to ASTM A123, ASTM A153 and BS729
 
  a) All material will be inspected as to be cleanliness (i.e. the degree of rust, grease, paint or other
 
  substances…etc).
  b) The cleaning of material or pickling process will be determined depending on cleanliness.
  c) The checking of material for spots will be conducted after pickling process.
  d) The material will be dipped in Zinc bath for period depends on its size, shape and thickness
  e) Removing excess zinc by shaking or by wiping and in tubes by blowing.
  f) Checking the purity of zinc path by using pure zinc 99.95%.
  g) Controlling zinc path temp. At 450 Co
  h) Cooling material by using running water
  i) Checking galvanization by visual inspection for homogenous surface, blacks and spots
  j) Checking galvanization thickness in accordance with ASTM A123, ASTM A153 and BS 729.
 
The above procedures totally ensure the quality as prescribed in ASTM A123, ASTM A153 and BS 729.
 
5) Obstruction Lighting System:
Low intensity Double obstruction Light is installed at the tower highest point, the lights must not be obscured by any object and always be visible in the horizontal plane. This type is a most probably red colour lamp. The lamps life time should be 8000 operational hours at least.
 
All aviation warning light brackets, threaded bolts and nuts will be stainless steel and will be fitted in position. All accessories like photocell, conductors size, filament voltage, wire supports, conduits and junction boxes required for obstruction lighting system is applied as dedicated by FCC/FA. The supplying cable should be 3 mm2 at least.
 
Tower obstruction control Panel is supplied with the following features:
  • Circuit Breaker Protection for both Lamps.
• Automatic day off as the tower is painted.
• Manual override.
• Control and monitoring for up to 2 steady obstruction lamps.
• 3 remote alarm free voltage contacts.
 
C) Instructions for attachment of guys and tensioners
It is recommended that gloves be worn when handling wire ropes. Just after rotating the mast to be in the vertical position and before extending the whole mast, the following has to be done: -
 
 
• Using the shackles provided, attach the ends of guy ropes to the guy lugs on the mast legs on the
  top of the first section of the mast.
• Mount the Head frame and antennas to the required azimuth.
• Install Jumpers and connectors, then connect the feeders and fix it to the tower top.
• Extend the mast using the winch.
• Using the shackles provided, attach the ends of other guy ropes to the guy lugs on the mast legs.
• Using the shackles provided, attach the ends of 3 guy ropes to the guy lugs on the mast legs on
  the top of mast.
 
D) Continer
The container is designed to provide a dust free, water and airtight environment. All doors & openings shall have adequate sealing provision against ingress of water and dust..
 
General Specification for Telecommunication compartment
 
 
1) Environmental Conditions.
 
The communication shelter container shall be designed and manufactured for a design life of 15 years minimum under the following environmental conditions.
  • Outside temperature range of –5 degrees C to +60 degrees C.
• Humidity – 95 %.
• Direct solar radiation.
• Withstand a 3 sec. gust wind speed of 45 m/sec.
• IP rating (Dust and water penetration): IP55.
• Heat permeability coefficient (thermal rating) less than or equal to 0.4 W/m2 K
• Inside temperature range 18 – 22 degrees C.
 
2) Loading Conditions.
750 Kg/m2 as distributed load
1500 Kg/m2 at areas of battery string
Floor – 400 kg as concentrated load
Floor – 30 kg/cm2 as punching load
Wall – 55 m/s. as wind load
Roof – 150 kg/m2 as distributed load
 
3) Container Frame (supporting the container).
The container frame shall be bolted with trailer frame using suitable Connection plates. All metal hardware shall be made of HDG steel or protected otherwise from corrosion.
 
4) Floor.
The floor shall be manufactured from insulated panels that have a core of polyurethane, mineral wool, or other insulation material, covered by two sheets of sheet metal. The panels should then be covered with fire resistant plywood sheet. The panels and plywood thickness shall be sufficient to withstand the floor loads without bending or warping.
The plywood shall be covered with an antistatic PVC sheet, glued securely to the plywood. At the intersection between the floor and wall, the floor has to be provided with earthing grid.
 
5) Walls and Roof.
The walls and roof shall be manufactured from insulated panels that have a core of polyurethane, mineral wool, or other insulation material, covered by two sheets of sheet metal.
 
Wall thickness shall be 100 mm and minimum thickness of galvanized sheet will be 0.6 mm Wall shall be strong enough to support air conditioners, power distribution panels, cable entries, cable ladders, and doors. Wooden rings should surround the walls in the fixation levels.
 
The container exterior shall be painted with an exterior weather resistant finish (white). Shelter wall will be 10 cm sandwich panel (2 metal sheets each is 0.6mm thickness + polyurethane wall.)
 
The metal part of the sandwich panel has to be treated against corrosion. Shelter roof material has to be like walls (sandwich panel); roof should be able to support a load of 150 Kg/m2.
The connections between shelter walls have to be interlocked more over, an aluminium angle connecting them.
 
6) Door.
The door should be placed in the long side.
The door shall have a clear width of 900mm.
The door shall open outwards and should have an external knob and an internal handle. A panic device shall be included on the inside of the door; so that the door can be opened from inside even if the door is locked.
 
The door shall be weatherproofed using silicon rubber to keep out water, wind and dust. The door shall be made of the same materials as the walls.
 
Bottom of the door will be 5-8 Cm above the floor level. The door clear height = 2.00m. The door has to be provided with a label -clearly visible plate- {DANGER - HIGH VOLTAGE) in English and National Language. Door is provided with master key pad lock.
 
7) Wall Openings.
The design includes holes to be cut in the sandwich panels to provide for Feeders, Ventilation, Cooling, Power and Earthing Cables.
 
On the left side of the rear wall of the container, cable entries shall be installed near the top of the walls for coaxial cable. There is Cable Entries also on the rear wall of the container for the Main Power Cable, Obstruction Light Cable, Feeding Winches Cable, Air conditions and Earthing. The cable entry systems used shall be a Roxtec, BST or equivalent. The system can withstand hazards as:
  • Dust.
• Fire (up to 60 minutes fire resistance).
• Explosion.
• Gas pressure.
• Noise.
• Vibrations.
• Temperature variation.
• Water.
• Vandalism.
• Insects.
• Humidity.
 
8) Cable Ladder.
Indoor cable Ladders may be galvanized type, approximately 400mm wide. They shall be suitably supported using hardware connected to the walls or ceiling. The cable Ladders should be installed near the ceiling along each of the long walls and along the back wall. as well as one in middle of the shelter.
 
9) Power Distribution Panel
The power distribution panel shall be made of sheet metal with a close able door, with main circuit breaker and group of smaller ones have all the smaller ones.
 
10) Air Conditioning System.
The Air Conditioners will be two Package units (1+1) each with cooling capacity =3 ton Ref. With cooling capability both of them will be connected to the AC control panel.
HVAC control panel shall incorporate:
  • Automatic interchange between two units for set time of min 12hrs.
• Facility for 2nd unit to automatically start in case the shelter internal temp rises above set temp of 25°C.
• The standby unit must automatically start incase the duty unit fails.
• The duty unit must automatically start when power returns after a power failure.
 
The controller should generate the following alarms:
  • High temp
• Any AC failure
• Stand by AC on
 
11) Fire Alarm System.
The Fire fighting system is a fixed installation where equipment is designed and installed to provide Fire Monitoring and Automatic Fighting. The main system components are as follows:
  • Automatic Detection.
• Automatic Alarms and Ventilation disconnection.
 
Automatic Detection.
The Fire Detection System consists of 2 combination loops which are as follows:
One loop equipped with optical smoke detectors as an option The smoke detector is capable of detecting products of combustion even before the presence of visible smoke.
One loop equipped with ionized smoke detectors. The smoke detector is capable of detecting products of combustion even before the presence of visible smoke
 
Automatic Alarms and Ventilation disconnection.
The Fire Alarm Control Panel is capable of producing the following:
Free voltage contact to the Site Alarm Frame. Its status is changed in case of Fire Detection by either Detectors. It has the facility to be either Normally closed or Normally Open.

Free voltage contact to the Site Alarm Frame. Its status is changed in case of Gas Cylinder Evacuation. It has the facility to be either Normally closed or Normally Open.

Free voltage contact to the Air Condition Control System. Its status is changed in case of Fire Detection by either Detectors. It has the facility to be either normally closed or Normally open.
 
Container Indoor Lightning Protection/Grounding.
The container indoor lightning protection system will meet the following requirements:
  a. 2 Copper Earth bars are installed inside the shelter one below the Electrical Distribution panel and one below the Feeders entry.
b. All the metallic parts( Rectifier, Batteries, BTS, Cable Ladder, MW rack, Door and gas cylinder, etc.) inside the shelter is connected to either bars by a proper Grounding cable cross section.
c. The 2 Copper Earth bars are connected by a 70 mm2 Grounding cable .
 
Fire Rating, Type Approval, and Certificates.
Container doors shall normally be rated for a minimum of 30 minutes of fire protection. The walls and roof shall normally be rated for a minimum of 30 minutes of fire protection.
 
Standard Accessories.
The following accessories shall be included in the container supply. These are additional to the items shown above.
  • Interior lights – 2 each 40 watt ceiling mounted fluorescent lights
• Interior emergency lights
• External Light with Photocell.
• Electrical wall outlets – 2 each double wall outlets 220 volts.
 
E) Gnenratop
 
  1) Generator (Electrical Supply).
  Generator Compartment:
27.0 KVA Diesel Generator inside canopy mainly used to supply Electrical RDU loads. Its specifications can be shown as the following:
  Cooling Type: Water-cooling.
Engine Type: Diesel Engine.
Voltage outputs: 3-phase 400/230 V AC.
Frequency: 50 HZ. Voltage regulator: Automatic.
Control Panel Indicators: Voltmeter- Ammeter –Run Meter-Automatic Battery Charger.
Manual controls: Start/Stop – Voltmeter Phase Selector – Emergency stop.
Circuit breaker: Manual and Automatic (Thermal Magnetic Circuit Breaker).
Automatic Shutdown Protection: Fail to start, High Engine Temperature, Low oil pressure and Over Speed.
Tank Capacity: 24 Hours Operation Capacity.
Protection class: Min. IP21.
Insulation class: H.
Noise: Decibel Limits 70 dB 7 meters apart.
   
  2) DC winches.
  Two winches are provided with the RDU, one for Mast rotation and the second for mast extension.
   
  3) Main Features.
  - Number of winches: 2.
- Function:
 
  • One winch is responsible for raising and lowering the Guyed mast.
• One winch is responsible for rotating the Guyed mast.
   
  - Electrical Supply: 24 VDC, 200 AH Battery and 20 A Alternator.
- Rated Line Pull: 3.630 tons.
- The motor can be mounted in any direction
- Diameter of the motor wire is 3/8 inch.
- The winch is resistant to corrosion, dust and water
- There is hand held for operation and stopping the winch.
- There is a safety timer to prevent winch working for more than the required time.
 
 
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