MEGATRO 55M GREENFIELD COMMUNICATION TOWER MGT-GF-C55 This refers to our 55m Greenfield communication telecom tower, height 55m, with all technical data below:
1 Design criteria 1.1 .1loading (general) All design and loading shall be calculated in accordance with one o the following: 1 BS BS8100; part 1: 1986 BS 6399: part 1:1996: part 2: 1997: part 3: 1988 and BS 648: 1964
2 ANSI/TIA/EIA-222-G Allowable rotation in top point: 0.25° degree Tower design as no-sway Self-support structure
1.1.2 Main load 1) Microwave dish Diameter: 1.2m+1.8m Weight: 100+135KG Location on the mast: at the top, in any direction NO of microwave dish: (4*1.2m)+ (4*1.8m) pieces 2) GSM antennas Diminutions: 0.3*3*0.11 Weight: 20kg Location on the mast: at the top, in any direction No of GSM antennas: 6 pieces 3) Feeder (antennas cables) Diameter: 7/8'' Weight: 5kg/M Location on the tower: from the bottom to the top NO of cables: tow cables from each GSM antennas
1.1.3 Secondary load Wind load: 150KM/H Temperature load: (-20ºC-45ºC) it is the ruing temperature in client site
Dead loading The self-weight of towers including ladders and platform is based on monomial size of members with an appropriate allowance of gussets, bolts and welds.
Wind loading Two basic types of tower maybe considered as this is "Heavy" range. The heavy range should be designed for a basic wind speed of 41.666 m/s at an altitude of 150m. this data is preliminary and maybe altered as soon as more accurate wind information data will be available.
Live load Individual members with an angle of 30°to the horizontal or less shall be designed to support a 1.5KN vertical point at mid span.
Towers shall be designed as class C structures with the main road environment as defined in BS 8100: part 1: 1986; Figure 2.1. or equivalent by ANSI/TIA/EIA-222-G
The serviceability check of the towers will be carried out in accordance with BS8100 clause 3.3. or equivalent by ANSI/TIA/EIA-222-G
The rotational displacement for any tower structure shall be limited to 0.5°measured at the highest dish level.
1.3 steel work The plan shape of tower is square For lattice towers all steel work including angels, flats and round solid bars will be hot rolled grade S275 or S355 to BS EN10025. Also steelwork circular hollow sections will be hot rolled S275 or S355to BS EN10210.
Bolts will be ho dip galvanized in accordance with BS7371: part 6: 1998.
All tower parts will be hot dip galvanized in accordance with BS EN ISO1461 and to the minimum thickness specified in table 2& 3 of the standard. Areas of galvanizing damaged during transport will be renovated as permitted in section 6.3 to FB EN SIO 1461.
1.4 the maximum height of the floor tower is 5m for easily transports and installation in site 1.5 the work plats should distribution on height of tower each 10m, except the end rest pleat should put on distance 3m from the top of tower.
1.6 antenna supports Each tower need the number of antenna supports as following: 1 GSM antenna: 6 pieces 2 Micro-wave antennas: 8 pieces
1.7 Concrete work The concrete work should be designed by ACI-318m-05 requirements. Take care for following design criteria: 1 concrete strength fc/28 DAYS 21MPa 2 Reinforcement strength Fy 280MPa 3 THE MAXIMUM bars size which use in design reinforcement concrete is 20mm (diameter of bar)
1.8 Access & climbing All base station towers shall be fitted with a access ladder in part complying with BS 4211. the access system shall also comprise a Glide lock/Rail lock or similar approved system.
1.9 Design life Tower structure Minimum structural design life shall be 15 years. Structure below ground: Minimum structural design life shall be 100 years. 1.10 British standards/Code of practice and EURO standards or find the equivalent which is recommended by ANSI/TIA/EIA 222-G BS 648 Weights of building materials BS 4211 Specification for Ladders for permanent access to chimneys, other high structures, silos and bins BS 4395 specification for high strength friction grip bolts & associated nuts & washers for structural engineering, general grade BS 5395 Stairs, ladders and walkways - Code of practice for the design of construction & maintenance of straight stairs & winders BS 5493 code of practice for protective coating of iron & steel structures against corrosion BS 5930 cod of practice for site investigations BS5950 structural use of steelwork in building, code of practice for design rolled & welded sections BS 6399 loading for building BS 6651 code of practice for protection of structure against lightning BS7371 part 6: specification for hot dipped galvanized coating on fasteners BS 7430 Code of practice for earthing BS 8004 code of practice for foundations BS EN1011 welding, recommendation for welding of metallic materials general guidance for arc welding.
2 tower analysis criteria For the design of the foundation the factors of safety shall be limited to 2.0 for uplift and sliding resisted by soil and 1.75 for overturning resisted by concrete using unfactored loads.
The safety factor included in the analysis shall be y v=1.2 on wind speed as prescribed in BS 8100 for upper limit of main road sites, as pressure is derived from the square of wind speed, the partial factor of safety in member loads therefore shall be 1.22=1.44
Member strengths shall incorporate a partial factor of 1.4 for class C structures as specified. (Member strengths shall generally be calculated in accordance with BS 5950 or BS8100: part 3: code of practice for strength assessment of members of lattice towers and masts-were a more detailed analysis of the members may be required.)
3 Drawings and information to be supplied by MEGATRO We provide below for all of our clients
general drawings for main items for steel towers
the member taper of each tower in millimeter/meter
the calculated weight of each class and length of member
general information about each tower length and class included tip load, location of point of fixity, type of steel used for the member, cross sectional shape, and connection details of multiple pieces towers (slip joint/ flange joints/welded to be one piece)
calculated reactions due to the tip loading (including shear, moment and axial reactions) in order to demonstrate conformance with the requirements
description of members shafts cross section including thickness of the plate all the bottom.
For each standard class tower, provide tower top deflection and twist (rotation) using the specified tip loading in order to demonstrate conformance with the requirements
Main dimensions of concrete foundation, weight reinforcement, and soil excavation add to that the quantities.
4 Markings For our delivered tower parts, will be permanently marked on the members and on the bottom side of the bearing plate with the following identifying information, unless specified otherwise by end client 1 height of tower 2 installation reference mark 3 manufacturer name 4 month and year of manufacture 5 length and class of member 6 owner's name
MEGATRO is a full service engineering company with a global reputation for delivering excellence and innovation in telecommunications systems. Over 10 years of experience and innovation in engineering, designing and building towers has evolved MEGATRO into its current form:
Full Turn-Key provider including site acquisition, engineering services, manufacturing, field services-DAS, tech services, value added reseller and monitoring, maintenance and network ownership
Specialize in developing supplying and building wireless and wired networks and in-building telecommunications systems, as well as energy infrastructure
Single source from Design to System Integration
Top quality, ISO 9001 registered
A complete selection of towers including self-support, lattice steel tower, monopoles and guyed towers, form custom-designed radar towers to broadcast towers and energy infrastructure. MEGATRO carries a variety of related products including fall protection, transmission lines, antennas, obstruction lights, and accessories, and other products if client need, MEGATRO also tailored product as per client condition.
MEGATRO mainly design all kinds of towers and posts for:
Telecoms
Power transmission
TV and Radio Broadcast
Roads and City Development
Our complete selection of towers includes:
Self-supporting
Monopoles
Guyed towers
Custom-designed radar towers
Broadcast towers
Power transmission
MEGATRO also designs and manufactures tower related products including:
Fall protection
Antenna brackets
Other accessories if needed by clients
This photo refers to our integrated telecom tower and accessories products. They are combined products which we design and fabricated, even source other items for our clients.
Products scope: 1 Telecom tower and antenna mounts 2 Tower foundation plate and anchor bolts 3 Obstruction light (ICAO) 4 Cable tray 5 Shelter room 6 Lightning rod 7 Tower earthing kits and rod 8 ladder for cable and feeder 9 Painting serves 10 Design for tower and foundation 11 Other services as per client
With general technical data as follow for telecom structures : • Available in heights of 5 to 120m • Designed for medium to heavy loads •Designed for primary cellular and MW backbone sites or central communication hubs • Lower freight cost due to freight efficiency • Available with a large variety of accessories that can be easily mounted at any stage • Enables easy reinforcement of legs at the site • Modular design to fit a specific site design and enable last-minute modifications
Accessories: • Working and rest platforms • Horizontal cable gantries • Antenna mounts • Anti-climb guard & other safety devices • Paint kit (ICAO standards) • Obstruction lighting system (ICAO standards) • Lightning protection kit
Design Standards: TIA/EIA 222-G, or BS8100, EUROCODE 3 PART 3-1
Materials: • Legs Q345B, or ASTM A572 GR50, or ST 52-3, or S355JR • Braces and plates Q235B, or ASTM A36, or S235, Or ST 37-2 Bolts: Chinese grade 6.8 and 8.8, which similar to ASTM A394
Fabrication A) Dimension and tolerance for angle are according to GB/T1591-1994, similar to EN 10056-1/2 B) Hot dip galvanization in accordance with GB/T 13912-2002, which similar to ASTM A 123 C) The welding will be performance in accordance with AWS D1.1 or CWB standard
Connections: Bolts (ISO 8.8, SAE Grade 5, or ASTM A-325) + flat washers, nuts and spring washers (5% hardware overage)
Anti-Corrosion Treatment: All steel elements are hot-dip galvanized (ASTM A123) Paint kit (white/orange)
Anchoring: Anchor rods (ASTM F1554) used with leveling nuts and a positioning template
Ladder: • Caged or open ladder with Safety climbing line or rail • Usually installed inside the tower • Option for attachment to any tower face • Vertical cable hangers Shipment: Standard 20' to 40' ISO container Documentation: • Detailed packing list • Installation & maintenance manual • Foundation design
Our MEGATRO performs in-house design activities by PLS software or other software. Our Engineering Department is boasting of highly qualified engineering who are conversant with international codes and standards. The work is carried out with extensive use of CAE/CAD via a large of computer network. The computer hardware & drafting software are liked to the CNC workshop equipment for downloading of information thereby eliminating error and saving valuable production time.
After fabrication all towers are delivered to the galvanizing facility to be Hot Dip Galvanized. Towers are processed through the facility by Caustic Cleaning, Pickling, and then Fluxing. These strict procedures insure years of maintenance free towers.
Moreover, we offer cost effective range of development and installation service regarding as an additional installation service. These are further, designed for both government and civil communications and suitable for both far-off and short distance communications. For additional protection, we cover these with protective shield to prevent the radioactive fallouts.
Other information: Availability size: Based on the customer's requirements. Material: Chinese material or as per clients requirement Package: Both parties discuss before delivery Port of Loading: Qingdao Port Lead Time: One month or based on the customer's needs Minimum order: 1 set Fabrication standard: Chinese Standard or other standard which client accepted
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