Active Member
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[China]
Address: 288, Zhuhai Road, Huangdao district, Qingdao city, Shandong Province, China
Contact name:Cindy Wang (sale manager)
Qingdao Megatro Mechanical and Electrical Equipment Co., Ltd. |
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66KV single circuit two earth wire 0-30 self supporting lattice steel tower
This photo refers to our 66KV single circuit two earth wire 0-30 self supporting lattice steel tower. This type towers were widely used in overseas regions, which we had export to some east-south Asian countries, and Africa.
All the tower design data as follow:
Type | Self-Supporting lattice Steel Tension Tower |
Nominal Voltage | 66kV |
Number of circuits | 1 |
Conductor arrangement | Three Phase Horizontal single conductor, cap and pin insulator |
Temperature range | 0oC to 45oC |
Cross arm Height | 16m |
Aerial earth arrangement | 2 earth peaks |
Type of aerial earth | 2 x 7/1’’steel wire |
Deviation | 0 o -30o |
Anchorage | Stub with cleats |
Conductor type | AAAC Tern |
Scope of supply | All tower members, bolts, nuts washers, anti-climb device , anti-bird guard , phase markers, number plates, tower earthing kits, lightning rod, and other accessories |
Maximum Wind | 20~35m/s |
Weight span | 150~450m |
Marking of tower members | According to client requirements |
Bird Protection | Equipped with Anti – bird perch device on all phases |
Anti –theft protection | Equipped with anti-theft bolts and anti-theft nuts from ground to anti0climb device |
Galvanizing standard | GB |
Design standard | According to client requirements |
Steel standard | BS, ISO, GB |
Design software | PLS |
Our supply scope:
(A) Generating loading trees
(B) Generating Electrical Clearance and Structural Outline drawing.
(C) Structral Outline drawing will include Group Summary Table inserted in the drawing.
(D) Structural Outline drawing will include the critical base reactions to be used in design.
(E) A PLS-TOWER backup file for all necessary design runs will be included in the design submittal.
(F) Group summary output and Foundation Reactions output reports in Notepad format from PLS-TOWER design runs will be provided. The tables can also be provided in Excel format.
(G) All supplementary Excel spreadsheets developed for redundant member design and wind area calculations will be provided.
(H) Drafting ＆ Detailing (if need)
(I) Tower Load Testing including test tower production (if need, but need pay test fees)
(J) Foundation Design (if need, but need design fees)
(K) Foundation Drawings (if need, but need design fees)
(L) Foundation and Stub settings (if need, but need design fees)
Since 2004, MEGATRO focus mainly international market and had
export many kind of transmission structures to overseas clients.
MEGATRO has been manufacturing lattice transmission tower &
tapered steel poles for lighting, traffic control, communication
and utility applications. MEGATRO pioneered the development of
transmission tower, telecom tower, substation, and other steel
structure and was also at the forefront in the design of
Transmission tower.
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
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
Today, with over 10 years of experience and our commitment to
excellence, MEGATRO remains an industry leader in the manufacture
and design of steel tubular & angular & monopole structures
for all Highway, Municipal, Custom, telecom, lighting and electric
Utility applications. MEGATRO has a complete staff of professional
engineering personnel trained in the PLS Pole program and three
different manufacturing processes for producing steel towers, poles
and other supports. We utilize the latest versions of PLS-CADD,
PLS-POLE, TOWER, AutoCAD and other CAD software.
For this 66KV single circuit two earth wire 0-30 self supporting lattice steel tower, we also consider below loads during design:
Normal loads
1 Dead weight load
2 Tension load
3 Erection load
4 wind load
Exceptional loads
1 Switching forces
2 short-circuit forces
3 Loss of conductor tension
4 Earthquake forces
Moreover, our MEGATRO is fully equipped and qualified to carry out Design Engineering services which includes:
√ Overhead Transmission line steel tower & Telecom steel tower
Basic Design and Analysis
√ Shop Erection Drawings
√ As-Built Drawings
MEGATRO performs in-house design activities specializing in electrical overhead transmission &telecom tower steel works, which include wind and earthquake loading, static analysis, stress analysis by finite element methods and fatigue. 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.
For all tower and mast production, MEGATRO is one of the few
manufactures who assemble a face of 66KV single circuit tower earth
wire 0-30 self supporting lattice steel tower. This attention to
quality may not be the cheapest process but it does insure every
tower meets our high standards of quality. And it helps to reduce
on-site construction cost due to mismatched assemblies. After
fabrication all 66KV single circuit tower earth wire 0-30 self
supporting lattice steel 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. MEGATRO'
66KV single circuit tower earth wire 0-30 self supporting lattice
steel towers systems can accommodate a variety of cross-arm.
MEGATRO also offers a wide variety of accessories and mounts.
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 ton
Fabrication standard: Chinese Standard or other standard which
client accepted
Steel grades
Tower legs: Chinese steel Q345B, which same to ASTM A572 GR50
Other webs, bracing and not stress plate and angle steel: Chinese
Q235B, which same to ASTM A36
Plates: Chinese steel Q345B, which same to ASTM A572 GR50
Bolts: Chinese grade 6.8 and 8.8, which similar to ASTM A394
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
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.
