45M light four legged telecom tower
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 45M light telecom tower mast, which we exported to some Asian countries these years. It is standard design with weight not too heavier, some of design data as follow:
Specification Of this 45m Mast
a. Fixation of Mast: 4 Legged Mast, Self support
b. Base Height of Mast: Zero Meters.
c. Wind Speed: 170 km/h (operational) fastest mile wind speed and survival wind speed must be more than 200Km/ h
d. Terrain Category: As per BS8100 or equivalent EIA method.
e. Safety Factors: 1.8
f. Maximum Sway at Top: 2.0 degree with full antenna loading at service wind speed.
g. Lightning System: Mast to include lightning rod and lightning protector system. Lightning rod should be 1meter extended from top of Mast.
h. Grounding: Mast must come with cooper grounding rod from top to bottom and with grounding system (< 1 ohms). .
i. Anti-Falling safety System: Mast must come with anti-falling safety stainless steel rope.
j. A labeled schematic drawing shall be submitted. The dimension of the Mast (internal & External) shall be provided. All design calculation for the loading shall be included.
k. The Mast shall be complete with all foundation materials for the installation of it.
l. The foundation for each individual site taking into account the soil condition. Soil test reports to be submitted and approved by our client.
M. Antenna:
6 nos. of antenna place (top level) as stated in the attached site list, where per antenna is 11kg.
6 nos. of antenna place (middle level) as stated in the attached site list, where per antenna is 11kg.
6 nos. of antenna place (lower level) as stated in the attached site list, where per antenna is 11kg.
N. Antenna bracket with 1.5 meter apart.
Antenna booms (3 meter) must be provided for all; top, middle and lower level to support the 18 antennas. To support microwave antenna approximately 45kg.
O. Feeder Running Option: Location for feeder running must be on the inside.
Antenna Fixing Option: Antenna mounts to be included as required allowing for azimuth and tilting adjustments.
p. Climbing ladder:
There should be provision for climbing up to the top of the Mast use step-climbing ladder. There should not be any gap between connected ladders.
q. Materials.
Masts should be manufactured from steel (high tensile as required) and finished with a hot-dip galvanized coating in accordance with BS729. Slip joints must be designed so the sections are retained over time.
r. Painting.
Paint system should be low VOC water based acrylic enamel finish. Solvent-based paints are not acceptable for safety reasons. Paint colour should match the standards laid out by the ICAO for tower/ Mast.
s. Tower Lighting: Two unit of tower light which should meet the standards laid out by the ICAO Tower/ Mast with photocell sensor per Mast. An approved lighting system shall be supplied with 5-year warrantee.
t. Additional Cable Tray:10 meter cable tray for each site. From Mast to our client equipment and power cabinet, thickness for cable tray must not be less than 0.6mm. Support to hold cable tray must be included. Diameter of pipe to hold the cable tray must be at least 3 inch. Cable tray and pipes must be galvanized.
U. Space Requirement: to be design and install within the space given by our client, and our MEGATRO give full details and information required on 4 legged Mast, self support
Design Standards:
TIA/EIA 222-G, or BS8100, EUROCODE 3 PART 3-1
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)
Anchoring: Anchor rods (ASTM F1554) used with leveling nuts and a positioning template
Shipment: Standard 20' to 40' ISO container
Documentation:
• Detailed packing list
• Installation & maintenance manual
• Foundation design
For this 45m four legged telecom tower and accessories, 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 poles are delivered to the galvanizing facility to be Hot Dip Galvanized. Poles 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
APPLICABLE STANDARD AND CODES
All towers manufactured and design shall be generally in accordance with latest revision of the following standards except where specifically directed otherwise.
General
IEC 60050 (151) International Electro-technical Vocabulary
Part 51 Electrical and Magnetic Devices
IEC 60050 (601) Chapter 601: Generation, transmission and distribution of electricity-General
IEC 60050 (601) Chapter 601: Generation, transmission and distribution of electricity-Operation
IEC 60059 IEC standard current ratings
Chinese Standard
| No |
Code |
DESCRIPTION |
| 1 |
GB/T2694-2003 |
Power Transmission line Steel tower - Technical requirements for manufacturing |
| 2 |
JGJ81-2002 |
Technical specification for welding for steel structure of building |
| 3 |
GB9787-88 |
Measuring and allowable tolerance for hot-rolled equal angle |
| 4 |
GB709-88 |
Measuring and allowable tolerance for hot-rolled plate and strip |
| 5 |
GB/T699-1999 |
Quality Carbon Structural Steel |
| 6 |
GB/T1591-1994 |
Low alloy high strength structural Steel |
| 7 |
GB700-88 |
Carbon Structural Steel |
| 8 |
GB222-84 |
Method of sampling steel for determination of chemical composition and permissible variations |
| 9 |
GB/T228-2002 |
Method for Tensile testing of metals |
| 10 |
GB/T232-1999 |
Method for Bending test of metals |
| 11 |
GB/T5117-1995 |
Carbon Welding Rod |
| 12 |
GB/T5118-1995 |
Low Alloy Welding Rod |
| 13 |
GB/T8110-1995 |
Welding wires for gas shielding arc welding of carbon and low alloy steels |
| 14 |
GB/T10045-2001 |
Carbon steel flux cored electrodes for arc welding |
| 15 |
JB/T7949-1999 |
Weld outer dimensions for steel construction |
| 16 |
GB50205-2001 |
Test Standard for Acceptance of Steel Structure |
| 17 |
GB/T470-1997 |
Zinc Ingot |
| 18 |
GB3098.1-2000 |
Mechanical properties of fasteners-Part 1:Bolts, screws and studs |
| 19 |
GB3098.2-2000 |
Mechanical properties of fasteners-Part2: Nuts, and thread |
| 20 |
GB3098.3-2000 |
Mechanical properties of fasteners-Part3: Fastening screw |
| 21 |
GB/T5780-2000 |
Helical Bolts Grade C |
| 22 |
GB/T41-2000 |
Helical Nuts Grade C |
| 23 |
GB/T90-2002 |
Flat Washer Grade C |
| 24 |
GB/T13912-2002 |
Metal Coating, Technical Requirement and Test Method for Hot-dip galvanized Metal Parts |
American Standards:
| Standard |
Description |
| ASTM A6/A6M |
Standard specification for general requirements for rolled structural steel bars, plates, and sheet piling. |
| ASTM - 6 |
- General Requirements for delivery of Rolled Steel Plates, Shapes, sheet Piling Bars for structural used |
| ASTM A36/A36-M-97a |
Standard specification for Carbon structural steel |
| ASTM A123 / A123M-02 |
Standard specification for Zinc (Hot-Dip Galvanized) Coatings on iron and steel products |
| ASTM A143 / A143M-03 |
Standard Practise for Safeguarding Against Embitterment of Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting Embitterment |
| ASTM A153/ A153M-05 |
Standard specification for zinc coating (Hot-Dip) on iron and steel hardware |
| ASTM A - 194 |
- Grade for bolt |
| ASTM A239 |
Standard practice for locating the thinnest spot in a zinc (Galvanized) Coating on Iron or Steel Articles |
| ASTM A242 |
Standard specification for High-Strength Low-Alloy Structural steel |
| ASTM A307 |
Standard Specification for Carbon Steel Bolts and Studs, 60000 PSI Tensile strength |
| ASTM A370-06 |
Standard Test Methods and Definitions for Mechanical Testing of Steel Products |
| ASTM A325 |
Standard Specification for structural bolts, steel, Heat treated 120/105 ksi minimum tensile strength |
| ASTM A-325 or A-354 |
- Galvanized hexagonal head of connection bolt |
| ASTM A325-97 |
Standard Specification for High-strength Bolts for structural steel Joints |
| ASTM A384 / A384M-02 |
Standard Practise for Safeguarding Against Warpage and Distortion During Hot-Dip Galvanizing of Steel Assemblies. |
| ASTM A394-93 |
Standard Specification for steel Transmission Tower, Bolts, Zinc Coated and Bare |
| ASTMA - 563 |
- Class and size of nuts |
| ASTMA - 572 |
- Chemical composition of steel |
| ASTM A572/A572-97c |
Standard specification for High-Strength Low-Alloy Columbium-Vanadium Structural steel |
| ASTMA - 615 |
- The anchor bolt material |
| ASTM A673 / A673M-07 |
Standard Specification for Sampling Procedure for Impact Testing of Structural Steel |
| ASTM B201 |
Standard practice for testing Chromatic coating on Zinc and Cadmium surfaces |
| ASTM E94-93 |
Standard Guide for Radiographic Testing |
| ASTM E 709-95 |
Standard Guide for Magnetic Particle Examination |
| ASCE Manual 72 |
- Load testing a simple structure |
| ASCE 10-97 |
Standard Design of latticed steel transmission structures |
| AWS D1.1 |
American Welding Society D1,1/D1,1M structural Welding code- Steel |
| ANSI B-182-2 |
Bolts, nuts and washers dimensions |
DIN VDE 0101 - Isokeraunic Level
VDE 0201 - Climatic and environmental conditions
CVDE 0210 - Minimum safety factors under simultaneous working loads
ISO R898 Mechanical Properties of Fasteners
BS EN ISO 1461:1991 - High dip galvanized coatings on fabricated iron and steel articles. Specifications and standards
A) BS 5950: Welding Terms And Symbols
B) BS 729: Hot - Dip Galvanised Coating On Iron And Steel Articles
C) BS 2901: Filler Rods And Wires For Gas Shielded Arc Welding: Part 1 Ferritic Steels
D) BS 3692: ISO Metric Precision Hexagon Bolts, Screws And Nuts
E) BS 4360: Weldable Structural Steel
F ) BS 5135: Metal - Arc Welding Of Carbon And Carbon Manganese Steel
G) BS 5950: Part 1: Code Of Practice For Loading Latticed Tower & Masts
Part 2: Guide To The Background And Use Of Part 1"Code OF Practice For Loading"
Part 3: Strength Assessment of Members
H) DD 133 (1986): Code Of Practice For Loading Latticed Tower & Masts
I) BS 4592 (1987): Part 2: Specification For Expanded Metal Grating Panels
J) BS 4592 (1977): Code Of Practice For Protective Coating Of Iron And Steel Structure Against Corrosion
K) BS 4190: Bracing & Flanged Bolts
L) BS 4190: Rolled Steel sections, Flats & Plates
If any special requirement, we can design and discuss with client.
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