Megatro 110kv and 10kv Double Circuit Suspension Tower2

Product Name: Megatro 110kv and 10kv Double Circuit Suspension Tower2 Structure: According to Client's Technical Specification Style: Independence Tower Standard: Nonstandard Materials: Steel Certification: ISO Conductor Circuit: Double Circuit Usage: Crossing Tower, Tension Tower, Angle Tower, Terminal Tower, Transposition Tower, According to Client's Technical Specification We Can Design by Pls & Tower Software: According to Client Desing or Requirement Trademark: MEGATRO Transport Package: Export Standard Package Specification: AS PER CLIENT Origin: Shandong, China HS Code: 73082000 Product Description Megatro 110KV and 10KV double circuit suspension towerThis photo refers to our 110KV and 10KV narrow base double circuit suspension tower. For this structure, we design them with narrow base and every section connection by welding or bolts. On top peak we design double earth wires.On top both sides, it is 110KV double circuit transmission lines, and bottom as 10KV distribution lines.Some of their specification as follow:Application scope110KV transmission lineTower NameDouble circuit Suspension towerTower typeSZDesign dataNominal height(m)Tower weight(kg)Conductor TypeLGJ-185186396.9Earth Wire TypeGJ-35216980.3Max.Wind speed(m/s)30248001.3Max.Ice(mm)10278857.5Horizontal span(m)450Vertical span(m)600Angle 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 110KV and 10KV narrow base double circuit suspension tower mainly for our 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:l Full Turn-Key provider including site acquisition, engineering services, manufacturing, field services-DAS, tech services, value added reseller and monitoring, maintenance and network ownershipl Specialize in developing supplying and building wireless and wired networks and in-building telecommunications systems, as well as energy infrastructurel Single source from Design to System Integrationl Top quality, ISO 9001 registeredA 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. Telecomsb. Power transmissionc. TV and Radio Broadcastd. Roads and City Developmente. Wind energy solutionf. Steel structure and workshopOur complete selection of towers includes:a. Self-supportingb. Monopolesc. Guyed towersd. Custom-designed radar towerse. Broadcast towersf. Power transmissionMEGATRO also designs and manufactures tower related products including:a. Fall protectionb. Antenna bracketsc. Other accessories if needed by clientsToday, 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 loads1 Dead weight load2 Tension load3 Erection load4 wind loadExceptional loads1 Switching forces2 short-circuit forces3 Loss of conductor tension4 Earthquake forcesMoreover, 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 DrawingsMEGATRO 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 110KV and 10KV narrow base double circuit suspension 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 110KV and 10KV narrow base double circuit suspension 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 productsDIN 55928 Protective painting of steel structure instructionsDIN 55945 Painting materials-NotionsDIN 18363 Paint work-BuildingsDIN 18364 Surface protection work for steelDIN 53210 Determination of rust degreeDIN 55151 Determination of adhesionISO4628/3 Determination of rust penetrationMEGATRO' 110KV and 10KV narrow base double circuit suspension 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 requirementSteel gradesTower legs: Chinese steel Q345B, which equivalent to ASTM A572 GR50Other webs, bracing and not stress plate and angle steel: Chinese Q235B, which equivalent to ASTM A36Plates: Chinese steel Q345B, which equivalent to ASTM A572 GR50Bolts: 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 requirementsThe 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 acceptedA) Dimension and tolerance for angle are according to GB/T1591-1994, similar to EN 10056-1/2B) Hot dip galvanization in accordance with GB/T 13912-2002, which similar to ASTM A 123C) The welding will be performance in accordance with AWS D1.1 or CWB standardD) All fastener galvanization conform to ASTM A153 requirements.Package: Both parties discuss before deliveryPort of Loading: Qingdao PortLead 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 setGeneral Fabrication RequirementsHere 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. BendingBending shall be carried out in such a manner as to avoid indentation and surface damage. All bending over 5o, or high yield steel, shall be performed while the material is hot.WeldingNo welding shall be done unless prior approval has been obtained from the Engineer.Welding shall not be allowed at tower attachment points for conductor, shield-wire, insulators or associated assemblies or brackets.Sub-punchingAll holes in structural steel less than 10 mm thickness may be punched to full size unless otherwise noted on the approved Drawings. Holes shown on the Drawings as drilled holes and all holes in structural steel 10 mm or more in thickness and tension members of cross-arms shall be drilled or sub-punched and reamed.All holes shall be clean cut and without torn or ragged edges. All burrs resulting from reaming or drilling shall be removed. All holes shall be cylindrical and perpendicular to the member.Where necessary to avoid distortion of the holes, holes close to the points of bends shall be made after bending.PunchingFor punching to full size, the diameter of the punch shall be 1.0 mm larger than the nominal diameter of the bolt, and the diameter of the die shall not be more than 1.5mm larger than the diameter of the punch. For sub-punching, the diameter of the punch shall be 4 mm smaller than the nominal diameter of the bolt, and the diameter of the die shall be not more than 2 mm larger than the diameter of the punch. Sub-punching for reamed work shall be such that after reaming no punch surface shall appear in the periphery of the hole.Hole SizeWhere holes are reamed or drilled, the diameter of the finished hole shall be not greater than the nominal diameter of the bolt plus 1.0 mm.AccuracyAll holes shall be spaced accurately in accordance with the Drawings and shall be located on the gauge lines.The maximum allowable variation in hole spacing from that indicated on the Drawings for all bolt holes shall be 0.8 mm.Fabrication TolerancesA specification for tolerances shall be submitted for approval by the Engineer prior to commencement of fabrication.Bolt ListA complete list of bolts showing their lengths and the members, which they are to connect shall be given on the erection diagrams.Step bolt:Each steel tower shall be provided with step bolts on one of the legs for single circuit steel tower and on two diagonally opposite legs for double circuit steel tower from approximately 2.5 meters above ground level to the cross arm and from thereon to each ground wire peak. Step bolts shall be furnished for each leg extension in an amount of 25% of the step bolt holes. These bolts shall not be less than 16 mm or 3/4" diameter, double nut type, 18 cm or 7" long with 35 mm or 1 5/8"diameter, symmetrical head, two hexagon nuts and spring washers, spaced not more than 45 cm or 18" apart. Each bolt shall withstand without permanent deformation a vertical load of at least 137 kg applied at the bolt head. If any technical specification, we will discuss with our client and confirm before mass production.Locking DevicesLocking 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 MarksAll 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.GalvanizingAll 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 InspectionAll 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 DrawingsOur 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 /confirm/ied, our MEGATRO can start shop drawings for client.)MarkingAll 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.Preparation for Shipping and StorageTo facilitate segregation of steel tower parts at the stockyard and to maximize the efficiency of erection, packaging of steel towers shall be as follows:All steel tower parts, including stub angles, plates and steel tower parts member shall be color coded. The color code shall be painted on both ends of the steel tower parts for all angular members and around the edges for plates. The color codes shall be as specified in the Technical Data Sheets. All stub angles shall be packaged per unit steel tower per type i.e., four (4) pieces per bundle.All cleats including bolts and nuts with spring washers for stub angles shall be packaged per unit steel tower per type in wooden boxes with corresponding color code painted on all corners of the box.All basic body steel towers shall be packaged per unit steel tower per type. Each package shall not exceed three (3) metric tons. The contents of each package per unit steel tower per type shall be identical for any succeeding unit type. The numbering of each package shall indicate steel tower type (basic), steel tower number and number of pieces included in the package. Example:MG -Basic/Steel tower No./Package No./Qty. in this packageMG -Basic/ 1 of 200/ 2/ 8All bolts and nuts with spring washers shall be package in tin cans or wooden boxes per unit steel tower per type and numbered as follows: Example:MG Bolts (Basic)/Steel tower No./Package No./QuantityAll plates and gussets for the basic steel tower shall be package in wooden boxes per unit steel tower per type and numbered as follows: Example:MG Plates (Basic)/Steel tower No./Package No./QuantityAll body extension steel tower parts shall be package per unit steel tower per type. The weight of each package shall not be more than three (3) metric tons. The contents of each package per unit per steel tower shall be identical for any succeeding unit steel tower. The numbering of each package shall indicate the steel tower type and extension steel tower number, and number of pieces included in the package. Example:MG Body Ext./Steel tower No./Package No./QuantityMG Body Ext./Steel tower No./Package No./QuantityAll bolts and nuts with washers and plates for the body extensions shall be packaged in wooden boxes per unit steel tower per type and numbered as follows:Example:MG Plates & Bolts/Steel tower No./Package No./QuantityAll steel tower parts/members shall be marked as indicated in the steel tower parts list. The markings shall be embossed, the size of which will be approved by the our client.All package numbers for the steel tower shall be in label form. The size of the label shall be 5 cm x 10 cm. The label shall be waterproof and all letterings on the label shall be printed. This label shall be attached on every bundle of package. Each bundle or package shall have at least two (2) labels, each label is visible on each side of the bundle.All bundle or packages for steel tower shall be properly strapped to avoid disintegration of the bundle when subjected to unnecessary impact. The strap shall be properly placed so that the breakage of one (1) or two (2) straps will not allow disintegration of the bundle or package.Smaller pieces shall be bundled, with all the pieces in any bundle having the same mark.All small pieces such as bolts and connections for ground wire and insulators shall be packed in boxes of not over 70 kg gross weight each. Bolts of different size or length shall be wrapped in separate sacks before boxing. Description, quantity, bolt size, and length shall be clearly marked on the outside of the sacks and boxes.When specified in the Purchase Order, bundling and packaging shall be in lots for each individual structure. Boxes or other containers shall be clearly marked to indicate the type of steel tower for which the enclosed material is intended, and the quantity and marks or description of contents shall be shown on the outside.Shipping shall be as specified by the Purchase Order and shall be in complete steel tower lots. All identifications shown on bundles, boxes or other containers shall be included on Contractor's shipping and packaging lists.APPLICABLE STANDARD AND CODESAll towers manufactured and design shall be generally in accordance with latest revision of the following standards except where specifically directed otherwise.GeneralIEC 60826 - Design criteria of overhead linesIEC 60652 - Loading tests on overhead line structuresISO 1459 - metallic coatings - Protection against corrosion by Hot Dip GalvanizingISO 1461 - Hot dip galvanized coatings on fabricated iron and steel articlesISO 12944 - Paint coatings, corrosion protection, and structural steelworkISO 898-1 - Mechanical properties of fasteners. Part 1-Bolts, Screws and studsISO 630 - Structural Steels - plates, wide flats, bars, sections and profilesISO 657 - Hot rolled structural steel plates tolerances on dimensions and shapeISO 7411 - Hexagon Bolts for high strength structural bolting with large width across flatsISO 657-5 - Hot rolled Structural Steel Sections equal and unequal leg anglesISO 7452 - Hot rolled structural steel plates tolerances on dimensions and shapeBS EN 50341-1 - Overhead electrical lines exceeding AC 45kV -General RequirementsBS 8004 - Code of Practice for FoundationsBS 8220 - Structural use of concreteANSI10-97 - Design of latticed steel transmission structuresIEC 60050 (151) International Electro-technical Vocabulary Part 51 Electrical and Magnetic DevicesIEC 60050 (601) Chapter 601: Generation, transmission and distribution of electricity-GeneralIEC 60050 (601) Chapter 601: Generation, transmission and distribution of electricity-OperationIEC 60059 IEC standard current ratingsChinese StandardNoCodeDEscriptION1GB/T2694-2003Power Transmission line Steel tower - Technical requirements for manufacturing2JGJ81-2002Technical specification for welding for steel structure of building3GB9787-88Measuring and allowable tolerance for hot-rolled equal angle4GB709-88Measuring and allowable tolerance for hot-rolled plate and strip5GB/T699-1999Quality Carbon Structural Steel6GB/T1591-1994Low alloy high strength structural Steel7GB700-88Carbon Structural Steel8GB222-84Method of sampling steel for determination of chemical composition and permissible variations9GB/T228-2002Method for Tensile testing of metals10GB/T232-1999Method for Bending test of metals11GB/T5117-1995Carbon Welding Rod12GB/T5118-1995Low Alloy Welding Rod13GB/T8220-1995Welding wires for gas shielding arc welding of carbon and low alloy steels14GB/T10045-2001Carbon steel flux cored electrodes for arc welding15JB/T7949-1999Weld outer dimensions for steel construction16GB50205-2001Test Standard for Acceptance of Steel Structure17GB/T470-1997Zinc Ingot18GB3098.1-2000Mechanical properties of fasteners-Part 1:Bolts, screws and studs19GB3098.2-2000Mechanical properties of fasteners-Part2: Nuts, and thread20GB3098.3-2000Mechanical properties of fasteners-Part3: Fastening screw21GB/T5780-2000Helical Bolts Grade C22GB/T41-2000Helical Nuts Grade C23GB/T90-2002Flat Washer Grade C24GB/T13912-2002metal Coating, Technical Requirement and Test Method for Hot-dip galvanized metal PartsAmerican Standards:StandardDescriptionASTM A6/A6MStandard 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 usedASTM A36/A36-M-97aStandard specification for Carbon structural steelASTM A123 / A123M-02Standard specification for Zinc (Hot-Dip Galvanized) Coatings on iron and steel productsASTM A143 / A143M-03Standard Practise for Safeguarding Against Embitterment of Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting EmbittermentASTM A153/ A153M-05Standard specification for zinc coating (Hot-Dip) on iron and steel hardwareASTM A - 194- Grade for boltASTM A239Standard practice for locating the thinnest spot in a zinc (Galvanized) Coating on Iron or Steel ArticlesASTM A242Standard specification for High-Strength Low-Alloy Structural steelASTM A307Standard Specification for Carbon Steel Bolts and Studs, 60000 PSI Tensile strengthASTM A370-06Standard Test Methods and Definitions for Mechanical Testing of Steel ProductsASTM A325Standard Specification for structural bolts, steel, Heat treated 120/105 ksi minimum tensile strengthASTM A-325 or A-354- Galvanized hexagonal head of connection boltASTM A325-97Standard Specification for High-strength Bolts for structural steel JointsASTM A384 / A384M-02Standard Practise for Safeguarding Against Warpage and Distortion During Hot-Dip Galvanizing of Steel Assemblies.ASTM A394-93Standard Specification for steel Transmission Tower, Bolts, Zinc Coated and BareASTMA - 563- Class and size of nutsASTMA - 572 - Chemical composition of steelASTM A572/A572-97cStandard specification for High-Strength Low-Alloy Columbium-Vanadium Structural steelASTMA - 615- The anchor bolt materialASTM A673 / A673M-07Standard Specification for Sampling Procedure for Impact Testing of Structural SteelASTM B201Standard practice for testing Chromatic coating on Zinc and Cadmium surfacesASTM E94-93Standard Guide for Radiographic TestingASTM E 709-95Standard Guide for Magnetic Particle ExaminationASCE Manual 72 - Load testing a simple structureASCE 10-97Standard Design of latticed steel transmission structuresAWS D1.1American Welding Society D1,1/D1,1M structural Welding code- SteelANSI B-182-2Bolts, nuts and washers dimensions DIN VDE 0101 - Isokeraunic LevelVDE 0201 - Climatic and environmental conditionsCVDE 0210 - Minimum safety factors under simultaneous working loadsISO R898 Mechanical Properties of FastenersBS EN ISO 1461:1991 - High dip galvanized coatings on fabricated iron and steel articles. Specifications and standardsA) BS 5950: Welding Terms And SymbolsB) BS 729: Hot - Dip Galvanised Coating On Iron And Steel ArticlesC) BS 2901: Filler Rods And Wires For Gas Shielded Arc Welding: Part 1 Ferritic SteelsD) BS 3692: ISO Metric Precision Hexagon Bolts, Screws And NutsE) BS 4360: Weldable Structural SteelF ) BS 5135: metal - Arc Welding Of Carbon And Carbon Manganese SteelG) BS 5950: Part 1: Code Of Practice For Loading Latticed Tower & MastsPart 2: Guide To The Background And Use Of Part 1"Code OF Practice For Loading"Part 3: Strength Assessment of MembersH) DD 133 (1986): Code Of Practice For Loading Latticed Tower & MastsI) BS 4592 (1987): Part 2: Specification For Expanded metal Grating PanelsJ) BS 4592 (1977): Code Of Practice For Protective Coating Of Iron And Steel Structure Against CorrosionK) BS 4190: Bracing & Flanged BoltsL) BS 4190: Rolled Steel sections, Flats & PlatesIf any special requirement, we can design and discuss with client.