MEGATRO four legged Chimney transmission steel tower
MEGATRO four legged Chimney transmission steel tower is a kind of iron tower structure which supports the chimney tube body with the steel structure support frame, the structure form has the self-supporting type and the pull wire type, mostly uses in the chemical industry enterprise, the petroleum department, Technical specification for chimney towers (1), design code for lightning protection of buildings (gb50057-94) 2, code for design of tall structures (gbj135-90) 3, code for design of steel structures (gb50017-2003) 4, construction and acceptance code for steel structures of tower mast (cecs 80: 2006) Parameter basic wind pressure: 0.35-0.75 km2 seismic intensity: 8 degree earthing resistance: ≤ 10 ω anticorrosion treatment: hot crossing zinc height: 1 m -200 m weight: steel with height variation: Baosteel / Shougang / Handan / Tangshan Iron and Steel Co., Ltd. Q 235 or 345 Design Life: more than 30 years vertical degree: 1 / 1000 appropriate temperature: -45c-45c connection: screw connection, Flange connection. The type of chimney tower can be divided into four column angle steel structure and three column steel pipe structure. Rust-proof and anticorrosive methods all materials of chimney tower structure (except anchor bolts) need to be treated with rust prevention. Generally, hot-dip galvanizing method should be adopted, which requires 30 years of corrosion resistance.
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:
l Full Turn-Key provider including site acquisition, engineering services, manufacturing, field services-DAS, tech services, value added reseller and monitoring, maintenance and network ownership
l Specialize in developing supplying and building wireless and wired networks and in-building telecommunications systems, as well as energy infrastructure
l Single source from Design to System Integration
l 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:
a. Telecoms
b. Power transmission
c. TV and Radio Broadcast
d. Roads and City Development
e. Wind energy solution
f. Other steel structure
Our complete selection of towers includes:
a. Self-supporting
b. Monopoles
c. Guyed towers
d. Custom-designed radar towers
e. Broadcast towers
f. Power transmission
MEGATRO also designs and manufactures tower related products including:
a. Fall protection
b. Antenna brackets
c. Other accessories if needed by clients
This photo refers to our 50M light weight 3 legged angular telecom tower, which we exported to Africa in year 2015, with some TOWERS details as follow:
1. 50m Tower with capacity to support 14sq.m loading at 40m/s including Internal climbing ladder with safety cage
2. Supply of a standard holed cable tray on to the plinths. Length 8m, thickness 1.5mm and 300mm width, with bend
3. Holding down bolts, anchor plates and five 1No.foundation setting template Vertical feeder support brackets
4. GSM /Cellular antenna mount-Leg mount With 3m Pole
5. Microwave Antenna Mount-Leg mount With 2m Pole
Note: Maximum dish size -1.8m diameter
6. Aircraft warning Light kit: single Top Mounted at 40m low intesity light, Outdoor Control box; Photo cell unit with accessories (ICAO standards)
7. Tower paint: Primer-1 coat, Tower Orange-2 Coats, Tower white - 2 Coats (ICAO standards)
8. Tower Earthing kit: Good earth kit material to give a reading of less than 3 Ohms(Earth Rods, Round 70mm bare copper wire, Earth rod 1.2M sabs m16,Denzo tape 50mm, Bolt brass M10X30mm,Nuts Brass M10 , earth Clamps 70mm brass etc)
Accessories:
? Antenna mounts
? Anti-climb guard & other safety devices
? Cable tray
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
Fabrication
A) Dimension and tolerance for angle are according to GB/T1591-2008, 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)
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 50M light weight 3 legged angular telecom tower, 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. 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
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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