Megatro 1100kv Sc Tangent and Transmission Lattice Tower

• Usage: Crossing Tower, Tension Tower, Angle Tower, Terminal Tower, Transposition Tower, Branching Tower, According to Client Requirements
• Conductor Circuit: Single Circuit
• Certification: ISO, GS
• Model NO.: MGP-1100kv
• Materials: Steel
• Standard: Nonstandard
• Style: Independence Tower
• Structure: According to Client Requirements
• Design Software: Pls
• Accessories 1: Power Fitting
• Accessories 2: Conductor and Cable
• Accessories 3: Earth Wire and Opgw
• Accessories 4: Tower Foundation and Design
• Accessories 5: Tower Earthing Kits and Lightning Rod
• Accessories 6: Aviation Light
• Accessories 7: Insulator
• Accessories 8: Anchor Bolts and Templates
• Accessories 9: Opgw and Cable
• Transport Package: Export Standard Package
• Specification: As per client requirements
• Trademark: MEGATRO
• Origin: Shandong, China
• HS Code: 73082000
• Production Capacity: 40000 Tons/Year

Product Description

MEGATRO 1100KV  SC tangent and transmission lattice tower
This photo refers to our 1100KV  SC tangent and transmission lattice tower, it is widely used in our Chinese market. Some of technical features of this tower as follow:
1 climate condition

Item	Temperature (ºC)	Wind speed (m/s)	Ice thickness (mm)
Max. temperature	40	0	0
Mini. temperature	-20	0	0
Ice thickness	-5	10	10
Basic wind speed	-5	27	0
Installation condition	-10	10	0
Annual temperature	15	0	0
Lightning overvoltage	15	10	0
Operation overvoltage	15	16	0

2 Technical specification of conductor and OPGW

Item		Conductor	OPGW
		JL/G1A-500/35	JLB20A-170
construction	AL	45×3.76
	Steel(Al wrap steel )	7×2.51	19×3.4
Cross-section (mm^2)	Al	500.00	43.13
	Steel	34.60	129.37
	Total	535.00	172.5
Diameter		30.11	17.01
Length mass (kg/km)		1650.2	1152.0
Elastic module (MPa)		63000	147200
coefficient of linear expansion (1/ºC)		20.9×10^-6	13.0×10^-6
Rated broken (N)		119410	203380

3 tower design data

Tower type	Nominal Height Scope (mm)	Horizontal span (m)	Vertical Span (m)	Angle º	Nominal height tower weight Kg
1000KV-10A1-ZM1	42	550	800	0~20	93551

4 type and force of conductor and OPGW

Power voltage	1100KV  SC tangent and transmission lattice tower	Conductor type	8×JL/ GIA-500/35	Max. operation Tension force (KN/phase)	363.006	Un-balance Stress value(%)	/
		OPGW Type	JLB20A-170	Max. operation Tension force (KN/pc)	56.827	Un-balance Stress value(%)	/

5 Operation data

Item	Horizontal span (m)	Vertical Span (m)	Representative Span (m)	Angle º	Height (m)	KV
data	460	600	400	0	57	0.8

6 loading data

Site condition				Normal operation condition			Accident condition		Installation condition	Non-uniform Ice condition
				Basic wind speed	Ice	Mini. temperature	Non- broken	broken
Climate condition (t/v/b)				-5/27/0	-5/10/10	-15/0/0	-5/0/10	-5/0/10	-5/10/0	-5/10/10
Horizontal loading		conductor		86989	16591	0	0	0	9588	---
		Insulator Power fitting		3749	362	0	0	0	362	---
		OPGW		6525	1636	0	0	0	700	---
Vertical loading		conductor		99780	157195	99780	99780	99780	170211	---
		Insulator Power fitting		21094	25301	21084	21084	21084	21084	---
		OPGW		7544	12234	7544	7544	7544	20597	---
Stress  force	conductor		One side	308864	361328	252224	--	---	242448	---
			The other side	308864	361328	252224	--	---	242448	---
			Stress differences	0	0	0	54200		0	---
	OPGW		One side	51320	57350		--	---	48416	---
			The other side	51320	57350		--	---	48416	---
			Stress differences	0	0	0	30555		0	---

7 Foundation distance size

Nominal Height (m)	Foundation distance (mm)		Anchor bolt
	Front distance	Side distance	Type and quantity	Distance /radius (mm)	Material
45	12750	12750	8×M56	320	Chinese type 35 steel
48	13380	13380
51	14010	14010
54	14640	14640
57	15270	15270

 

770

9 Here is the design strength of Chinese tower steel

Steel material		Anti-push, bending and press strength (N/mm^2)	Anti-shear strength (N/mm^2)
Grade	Thickness or diameter (mm)
Q235 Steel	≤16	215	125
	>16~40	205	120
	>40~60	200	115
	>60~100	190	110
Q345 Steel	≤16	310	180
	>16~35	295	170
	>35~50	265	155
	>50~100	250	145
Q420 Steel	≤16	380	220
	>16~35	360	210
	>35~50	340	195
	>50~100	325	185
Q460 Steel	≤16	415	240
	>16~35	395	230
	>35~50	380	220
	>50~100	360	210

10 Here is the design strength of our Chinese tower bolts

Item	Grade	Anti-push strength (N/mm^2)	Anti-shear strength (N/mm^2)
Fastener for towers	4.8	200	170
	5.8	240	210
	6.8	300	240
	8.8	400	300
Anchor  bolts	Q235	160	/
	Chinese 35 steel	190	/
	Chinese 45 steel	215	/

Remark: above technical data only references for our client, we can design every type for our overseas clients.

MEGATRO is a full service engineering company with a global reputation for delivering excellence and innovation in power transmission, transformation, distribution, and telecommunications systems. Our MEGATRO provide and design this type 1100KV  SC tangent and transmission lattice tower mainly for our Chinese and overseas client. 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:

1. Full Turn-Key provider including site acquisition, engineering services, manufacturing,   field services-DAS, tech services, value added reseller and monitoring, maintenance and network ownership
2. Specialize in developing supplying and building wireless and wired networks and in-building telecommunications systems, as well as energy infrastructure
3. Single source from Design to System Integration
4. 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:

1. Telecoms
2. Power transmission
3. TV and Radio Broadcast
4. Roads and City Development
5. Wind energy solution
6. Steel structure and workshop

Our complete selection of towers includes:

1. Self-supporting
2. Monopoles
3. Guyed towers
4. Custom-designed radar towers
5. Broadcast towers
6. Power transmission

MEGATRO also designs and manufactures tower related products including:

1. Fall protection
2. Antenna brackets
3. 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.

The structure shall be designed according to load combinations given as per IEC 61936-1 and as illustrated below:
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, 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.

Besides, MEGATRO is one of the few manufactures who assemble a face of 1100KV  SC tangent and transmission lattice 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 1100KV  SC tangent and transmission lattice 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. All finished surfaces shall be level and free of tears, burrs, clots and impurities.

Except otherwise specified elsewhere in the specification, the surface treatment and corrosion protection for all metal parts shall be in conformity with the latest revision of the standards listed below:
ASTM A 123 zinc (hot-dipped galvanized) coating on iron and steel products
DIN 55928 Protective painting of steel structure instructions
DIN 55945 Painting materials-Notions
DIN 18363 Paint work-Buildings
DIN 18364 Surface protection work for steel
DIN 53210 Determination of rust degree
DIN 55151 Determination of adhesion
ISO4628/3 Determination of rust penetration

MEGATRO' 1100KV  SC tangent and transmission lattice tower 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
Steel grades
Tower loading legs: Chinese steel Q420B, which equivalent to ASTM A572 GR60
Other webs, bracing and not stress plate and angle steel: Chinese Q235B, which equivalent to ASTM A36
Plates: Chinese steel Q345B, which equivalent to ASTM A572 GR50
Bolts: Bolt quality shall be Chinese Class 6.8 and 8.8, as per our Chinese standard, or ISO 898 standard or ASTM A394 type 0,1,2,3 requirements
The anti-theft bolts shall be Huckbolt Fasteners or approved equivalent.  The fasteners shall be manufactured from high tensile steel A242 or equivalent and hot-dip galvanized in accordance with ASTM specification A153 and A394.
 
Fabrication standard: Chinese Standard or other standard which client accepted
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
D) All fastener galvanization conform to ASTM A153 requirements.

Package: Both parties discuss before delivery
Port of Loading: Qingdao Port
Lead Time: One month or based on the customer's needs (For time being our capacity about 5000 tons one month, and can meet client requirements)
Minimum order: 1 set


General Fabrication Requirements
Here is general fabrication requirements for our transmission tower; however, both parties must discuss all drawings and confirm all shop drawings, technical specification, and which standard to conform.
Before mass production, we must received all signed approved shop drawings and technical documents from our client.

Our Fabrication shall be in strict accordance with detail Drawings prepared by the Contractor and approved by the Engineer.  Fabrication shall begin after the approval of the shop assembly and tests.
      
Shearing   
Shearing and cutting shall be performed carefully and all portions of the work which will be exposed to view after completion shall be finished neatly.  Manually guided cutting torches shall not be used.

All material over 13 (or 12) mm thick shall be cold sawn or machine flame cut.
Cropping or shearing shall be allowed for material thickness of 13 mm or less.
Flame cutting of high yield steel shall be preceded by a slight preheat operation by passing the cutting flame over the part to be cut.
All flame-cut edges shall be ground clean.

Bolt List
A complete list of bolts showing their lengths and the members, which they are to connect shall be given on the erection diagrams.



Locking Devices
Locking devices for tower bolts will not be required, but point punching shall be performed.

Anti-theft Fasteners    
Appropriate anti-theft fasteners for example Huck-bolting shall be applied on all the towers up to the level of anti-climbing devices, to prevent theft of tower members.

Piece Marks
All pieces shall be stamped before galvanizing with the piece marks shown on the erection Drawings, with the marking not less than 20 mm high placed in the same relative location on all pieces.  The marking shall be plainly visible after galvanizing.

Galvanizing
All material shall be hot-dip galvanized after fabrication in accordance with the latest revision of GB/T 13912-2002 or ASTM Specification A 123.

Material that has been rejected because of bare spots or other coating defects shall either be stripped and re-galvanized, or the uncoated areas shall be recoated by an approved method.

All plates and shapes which have been warped by the galvanizing process shall be straightened by being re-rolled or pressed.  The material shall not be hammered or otherwise straightened in a manner that will injure the protective coating.

Approval shall be secured from the Engineer if galvanizing is done outside of the Contractor's plant.

All galvanized steelwork shall be protected against white storage stain by using an approved dichromate solution treatment immediately following galvanizing.

Shop Assembly and Inspection
All built-up assemblies shall be shop bolted complete with washers, after  galvanizing, and shipped as a unit. When specified in the Purchase Order,  MEGATRO shall completely assemble in the presence of Owner one (1) structure of each type before the first shipment of such structures. Any errors in the shop detail drawings or shop work shown by this assembly shall be immediately corrected. MEGATRO's proposal shall include the work required for these shop assemblies. Any material rejected by Owner for failure to conform with this specification or the Purchase Order shall be corrected or replaced by MEGATRO. The fact that material has been inspected, or Owner has waived the right to inspect any material, shall not prevent rejection of the material if it is found not to be in proper condition o r to have fabrication inaccuracies preventing proper assembly.

Design Calculations and Drawings
Our MEGATRO can perform complete design calculations, design drawings and shop detail drawings of each structure and submit checked calculations and drawings for Owner's review and distribution in the quantity, manner and time set forth in the Purchase Order. Our drawings consist of the following:

Design drawings showing structure dimensions, conductor clearance diagrams and schedule of member sizes, bolt sizes and material specifications.

Erection drawings showing each individual member with its identification  mark, location and position of outstanding leg of angles, with number, diameter and length of bolts for connection; and typical details to large scale where a number of members frame together.

Shop detail drawings showing all dimensions, draw for tension diagonals,  and all shearing punching, bevel cutting, grinding, bending and identification mark for each member.

A complete Bill of Material for each structure showing the number, kind, size, length, weight and identification mark for each member including all bolts.
(Remark: only PO confirmed, our MEGATRO can start shop drawings for client.)

Marking
All pieces shall be distinctively marked with erection marks clearly visible  after galvanizing, corresponding to those on the erection drawings. Steel tower  steel stamping dies, minimum 16 mm or 5/8" high, shall be used and special care shall be taken to see that all erection marks are  made  in  such  a  manner as not to be obliterated in transit, or in any way damage the galvanizing or impair the strength of the member.

In marking the members, each marking shall be prefixed by letters, which indicate the type of the steel tower. For members that are used in more than  one type of steel tower, all steel tower-type designations shall appear on the marking.

In addition, the members shall be marked with water -proof ink stencil 25 mm. or 1.0" high after galvanizing to facilitate in yarding the members and erecting the steel towers.

The diameter and the length of the bolt shall be marked on each bolt end so as to be visible after galvanizing.

An additional Contractor identification mark shall be stamped immediately in front of the piece identification marks. This Contractor identification mark  shall be submitted to Owner for acceptance and registration prior to first use.

Identification marks shall be located conspicuously to permit easy reading.   Marking of like pieces shall be identical in location, and pieces over 14 feet in length shall be marked at both ends.

Identification marks shall be applied as follows:
Before galvanizing stamp with 2.0mm deep, 15.0mm minimum height steel  die letters and numerals. After galvanizing neatly stencil a 6.0mm wide  straight line, to underline the identification marks, made with durable paint or ink that will adhere to the galvanized surface and remain legible.

All small items that are not adaptable to die marking and are not boxed shall be identified by either attaching die stamped steel tags or plastic tags with permanent markings. The tags shall be attached with non-corrosive wire.

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/T8220-1995	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.