Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :1 of 42
1
SPECIFICATION NCS - 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Prepared by : B. Shomer
Updated by: E. Chen
Checked and approved by : Y. Samoocha
MARCH 2017
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :2 of 42
2
CONTENT
Paragraph Page 1.General 3 2.Threshold conditions 4 3.Documents for the proposal 4 4. Examining the proposals and the bidders 5 5. Material 5 5.1 Structural Steel 6 5.2 Bolts, nuts, spring washers 6 5.3 Manufacturing standards 7 5.4 Material tests 8 6.Fabrication 8 6.1 Cutting 8 6.2 Bending 9 6.3 Punching and drilling 9 6.4 Welding 10 7. Tolerances 11 8 Marking 12 9.Testing after manufacture 12 10.Galvanising 13 11. Packing 14 12. Quality assurance 15 13. Quality control 15
14. Delivery approval conditions 15 15. Service during warranty period 17 16. Time schedule 18 Appendix "A" – Questionnaire for manufacturer 19-20 Appendix "B" - Statement of manufacturing
experience 21
Appendix "C" – Adjustment to the specification
NCS-232 22
Appendix "D" – annexure 1-15 23-40 Appendix "E" – Israel Electric Corporation
(I.E.C.) - ITP for Overhead lines steel lattice towers 41
1. Revisions 42
Appendix "F" – Quality control Q-APP-02 ED.4
Israel Electric Corp. Ltd.
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Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :3 of 42
3
1. General
This specification describes the requirements pertaining to the manufacture of Steel
Transmission Towers.
All materials, details and fabrication shall be in compliance with details on the drawings
and the requirements described hereafter.
Contract clauses mentioned in the specification are:
Price for IEC catalogue numbers of towers, extensions, assembled and
dismantled crossarms according to Annexure 14. The price includes production
(crossarms which are provided assembled, the price includes production,
assembling, bolts, nuts, spring washers) and delivery under the terms of the
tender. Drawings of this section will be sent along with the order to provider,
(Tower structure layout, IEC catalogue no.' and number of drawings – see
Annexure 14 and 15).
The catalogue number may have more than one drawing, in which case it will be
possible to see in tower structure layout drawing.
Price for the production 1 ton for towers, extensions or crossarms (only supplied
dismantled). The price includes production and delivery under the terms of the
tender.
This section is intended for ordering towers, extensions and crossarms whose
consumption is low and their design is similar to the design of towers, extensions
and crossarms in the previous section.
An order under this section will be done by separate sections, each section IEC
order them (each item and its catalogue number and weight) Supplier will handle
any item as in the previous section regarding packing, marking, shipping and etc.
Cost for 1 ton crossarms which are provided assembled. The price includes
production, assembling, bolts, nuts, spring washers, and delivery under the terms
of the tender. Example for crossarm supplied assembled can be seen in annexure
15.
Cost for assembling 1 ton prototype assembly. The price includes assembling, film
the assembly, dismantling, and issue a report.
Changes drawings: IEC permitted from time to time to update the production
drawings, drawings will be sent to supplier, within two weeks supplier shall
reference the change and in accordance with the agreement to reach - will be
carried out.
Israel Electric Corp. Ltd.
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Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
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The specification describes fabrication procedures such as: cutting, bending, punching,
drilling, welding and bolting, marking, galvanizing according to the shop drawings.
The specification defines requirements for packing (some of the crossarm will be
supplied assembly) and transportation, quality control, shop assembly, and service
during warranty period.
Quality Control requirements will be acc. Q-AAP-02 ED4.
For fabrication procedures not covered in this specification, the latest edition of other
industrial standards shall be applicable.
In case of discrepancies or nonconformity between documents, priority shall be as
follows:
1. The drawings.
2. The present specification or written approval by IEC (Israel Electrical Corp.)
engineers.
3. Other industrial standards.
2. Threshold conditions:
In accordance with the attached documents of the supply and storage division.
3. Documents for the proposal
The bidder will submit together with his offer the following Documents:
3.1 For all the bidders:
3.1.1 Completed and filled-in questionnaire, see appendix A.
3.1.2 Declaration appendix C:
3.1.2.1 Declaration indicating that raw materials - steel and bolts, purchased from
manufacturers (who have Valid ISO 9001 certificates) to be approved after
winning by the IEC.
3.1.2.2 Declaration indicating that the proposal fully meets all requirements
of present specification and fabrication drawings.
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Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
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3.1.2.3 Declaration indicating that non Israelis manufacturers will be employing by the
Contract Israeli subcontractor for services as written in para.15 (only for foreign
contractor).
3.2 For bidders that not approved as IEC suppliers for lattice towers fabrication
3.2.1 Valid ISO 9001 certificate as defined in the threshold conditions.
3.2.2 Statement of manufacturing experience, see appendix B.
3.2.3 Manufacturers Fabrication facility description (Brochure, Catalog) of capability
with respect to items in tender.
3.2.4 Manufacturer shall submit Plant organization chart and technical staff
description.
-The above mentioned documents will be in English or Hebrew.
4. Examining the Proposals and the Bidders
IEC representatives shall be entitled to visit any plant, site or office which is held or
operated by the bidder and to request and to receive any information concerning the
bidder and/or the services offered. The IEC shall be entitled to disqualify any proposal if
it deems that the person submitting the proposal did not cooperate with the IEC
representatives or did not furnish information as required.
The purpose of the visit: checking whether a manufacturer can meet the specification
and verification of data filled out the questionnaire.
5. Material
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The Successful Bidder will purchase steels and bolts only from the list of manufacturers
that have Valid ISO 9001 certificates and approved by IEC. The successful bidder can
change steel, bolts, nuts manufacturers with IEC approval.
5.1. Structural steel designation standard
Designation of steel will conform to EN 10025 –part 1,2. (“Steel for General Structural
Purposes”).
The steel will be “suitable for hot galvanizing”.
Steels are to have Si contents less than 0.04% or from 0.14% to 0.25%.
Designation of steel
All items:
According to European standard - EN10025:2004 steel S235JR or S235JO
According to European standard - EN10025:2004 steel S355JO
All materials shall be brand new.
Before being laid or worked in any manner, structural materials shall be straight and
shall be cleaned of all rust and dirt. If straightening is necessary, it shall be done by
methods that will not damage the metal.
5.2 Bolts, nuts, spring washers
Bolts, nuts, spring washers that will be dedicated to crossarms needed assembly.
5.2.1 Bolts
Degree of bolts strength will be 50 kg/mm2
Bolts will be acc. ASTM – A-394, Type 0 – zinc-coated bolts made of low or medium
carbon steel.
Bolts hardness will be Rockwell B Min. 80, Max 100.
Bolts will be hot dip galvanized minimum thickness 40 µm.
Dimensions and tolerances see annexure 13.
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Specification NCS 232
FOR TRANSMISSION LATTICE
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Edition no.: 2
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5.2.2 Nuts
Nuts will be acc. ASTM-A 563 GrA.
Material shall be from carbon steel.
Nuts hardness will be Brinell MIN 116, MAX 302. Rockwell MIN B68, MAX C32.
Nuts will be hot dip galvanized minimum thickness 40 µm.
Dimensions and tolerances see annexure 13.
5.2.3 Spring washers
Spring washer will be acc. ASME B18.21.1- 1999.
Material shall be from carbon steel.
Dimensions of Regular helical spring lock washer acc. table 1 in ASME B18.21.1- 1999.
Hardness requirements shall be: HRC 40-50, 392-513 HV.
Spring washers will be hot dip galvanized minimum thickness 40 µm.
5.3 Manufacturing standards - dimensions, shape and tolerances
The dimensions and tolerances of items must conform to the following standards:
5.3.1 Angle Iron
Hot Rolled Round Edge Equal & Unequal Angles - according to, EN 10056-1,2.
5.3.2 Channel Profiles
Hot Rolled Round Edge/Channels - according to, EN 10279.
5.3.3 Flat Profiles and Strips
Hot Rolled Flat Steel for General Purposes 5/10-60/150 - according to DIN 1017 -1 &
EN 10058.
Hot Rolled Wide Plates 5/150-60/1250 - according to DIN 59200.
Hot Rolled Strips, Hot Rolled Sheets 0.8/10-10/120 - according to, EN 10048.
5.3.4 Plates
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Hot Rolled Plates (3 mm to 150 mm thick) - according to, EN 10029
Cold Rolled Plates less than 3 mm thick - according to, EN 10131.
Note: Other raw materials equivalent properties (which are not listed in this
specification) may be proposed for approval by the IEC.
5.4. Materials tests
The successful Bidder (contractor) shall identify all materials on the appropriate mill test
reports and shall furnish them to IEC.
The contractor is required to perform the physical tests on samples of structural steel
sections.
The tests to be carried out shall include yield strength, ultimate tensile strength and
percentage elongation and show chemical properties.
The contractor shall supply test reports for bolts acc. ASTM – A-394, nuts acc. ASTM-
A 563 and spring washers acc. ASME B18.21.1- 1999.
6. Fabrication
Production will be controlled with suitable machines (such as drilling and punching will
be done by CNC machines), appropriate work areas, manpower to carry out the work
will be suitable and competent to perform various works.
During the manufacturing process safety precautions will take according "Standard
Practice for Safeguarding Against Embrittlement of Hot – Dip Galvanized Structural
Steel Products and Procedure for Detecting Embrittlement" – A 143 – Latest edition.
If there is discrepancy, this should be settled in writing prior to fabrication.
6.1 Cutting
Materials may be sheared to length, but the ends, unless otherwise noted, may be square
with the length and free of burrs so that difficulty of assembly caused by the interference
of the end section with other members at the time of assembling the steel tower may not
occur.
Israel Electric Corp. Ltd.
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Specification NCS 232
FOR TRANSMISSION LATTICE
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The use of a burning torch is permissible for cutting members providing all irregular
edges are trimmed smoothly before galvanizing. Stresses shall not be transmitted into
the metal through burned surface. The use of a burning torch for cutting bolt holes will
not be allowed.
Materials with thickness of less than 18 mm may be cut with a suitable guillotine on
condition that no distortion is caused.
Materials with thickness of more than 18mm must be cut with a saw or burning torch.
Note: Other method cutting only with the prior approval of the IEC
6.2 Bending
The possibility of cold bending normally depends on the shape of part (angle, plate, etc.),
type of steel, angle and radius of bending and equipment for bending.
The radius of the bend will be not less than 3 times of part thickness.
All bends of a difficult nature on structural steel shall be performed while the material is
hot.
Members bent hot shall be heated in a non-oxidizing flame over a sufficient area to
prevent excessive deformation.
Hot bends shall be placed for slow cooling in air.
All bends shall be finished, free from waves, folds.
A member bent in error with respect to the location of a bend line shall be rejected.
You cannot bend back steel already over-bending flexion.
6.3 Punching and drilling
The manufacturer must carry out the drilling and punching with CNC machines.
Holes are to be punched with racks and jigs employed to ensure accuracy throughout.
The punches and dies for this work must be maintained sufficiently sharp so as to
produce clean round holes.
Holes may be punched and drilled in high-strength structural steel under 11 mm thick.
Over 11 mm holes can be punched to preliminary hole and then be finished by drilling to
final dimension and reamed.
Table no.1 shows the dimensions of preliminary and final holes.
Table no.1
Bolt
Preliminary
hole (mm)
(punching or
drilling)
Final hole
(drilling)
1/2" 10 14.5
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Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
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5/8” 14 17.5
3/4” 17 21
7/8” 20 24
1” 23 27
Holes in elements with welded reinforcement plates will be done only after welding.
Thickness of such element will be calculated according the sum of thickness of element
and reinforcement.
Holes in bent members which may be affected by the bending operation shall be laid out
and punched or drilled after bending. Holes which are elongated or otherwise distorted
by bending will not be accepted.
Special care is to be exercised to ensure exact spacing of holes and their distance from
back of angle and to end of piece.
No welding, filling or plugging will be permitted unless otherwise approved by IEC.
Plates can be produced using computerized machines laser or water, provided that plate
edges and holes will be clean and smooth and on condition that would not cause damage.
6.4 Welding
All welding is to be performed in the shop. Welding will be in conformance with the
AWS D1.1 of the American Welding Society Structural Welding Code.
Welding process: SMAW.
Welding quality will be according to AWS D1.1.
Welding symbols will be, acc. ISO 2553, BSN EN 22553, Israel Standard 1061.
All welding shall be performed by qualified welders, or welder operators, using qualified
welding procedures in accordance with the Code AWS D1.1.
Electrodes:
Butt welds - E7018 ASME SFA – 5.1.
Diameter of electrode: 2.5-4.0 mm.
For fillet welds E7024 can be used.
Seal welds up to 3 mm possible to perform – welding process GMAW with CO2 backup
gas.
Type of welds:
Complete penetration groove welds (see annexure).
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Specification NCS 232
FOR TRANSMISSION LATTICE
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Edition no.: 2
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- Two angles to back plate connected externally, see ann.1.
- Penetration welds (Angle to plate connection), see ann. 2.
- Internal connection of two angles with angle, see ann.3.
- U Profile connection, see ann. 4.
- Directive for penetration and fillet weld check, see annexure 5.
- Internal connection between two angles by welding a connection angle, see ann.8.
Bevel preparation:
Bevels shall be prepared by grinding or machining, by Arc air gouging or plasma cutting.
After cutting, surface must be ground smooth and must be free of burrs and all oxides.
Bevels shalll be prepared according to the welding details as shown in annexure 1-4.
Types of welds and joints will be according to the drawings otherwise- according to
AWS D1.1.
Testing of welds
The contractor will check the welding visually to make sure it meets the requirements
specified in the standard AWS D1.1:
Measurements, tattoos and overlapping, penetration and melting, cracks, backing strip,
pores and slag, welding final cleaning
Changes in method of welding
In case that contractor wants to make changes in welding procedures he must to receive
a permit of IEC metallurgical.
In addition to the above, the IEC reserves the right to visit the Contractors Works at
any reasonable time during fabrication of the items of plant and to familiarize himself
with the progress made and the quality of the work to date.
In the event of the Contractor wishing to make an alteration to any part of the weld
preparation, he shall first submit to the IEC a copy of the revised drawing showing the
amended preparation in detail and await confirmation of its acceptance or non-
acceptance.
All important welding that, according to the IEC, may be subject to excessive efforts
or do not seem to comply with the standards, may be x-rayed at his request.
7. Tolerances
The parts of tower will be manufactured in accordance with the drawings.
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- Tolerance of the length of each part shall be +2.0/-1 mm for leg part elements and
braces.
- Tolerances for center to center hole spacing will be 1 mm and not gathered.
- Tolerance between center of hole to the end of steel part will be + 2 mm.
- Tolerance to hole diameter will be -0/+0.5 mm
- Tolerance to length and width of plate will be+/- 1 mm.
- Tolerance to bending plates or bars dimension will be +/-1 mm
- Tolerance to weld length dimension will be +/- 1 mm
- Tolerances to hinge connection on crossarms will be -0/+1 mm
- Tolerance to crossarm connection to tower +2/-1 mm
- Tolerance from center of bolts segmentation to end of profile (in external joint) will be
+1/-0 mm, and +0/-0.5 mm (in internal joint)
- Tolerances for center to center hole spacing in braces will be +/- 0.5 mm.
The supplier shall supply a list of fabrication tolerances to the purchaser for approval.
8. Marking
All dismantled tower members are to be stamped with distinguishing numbers or letters
corresponding to the information below. These marks shall be impressed before
galvanizing and are to be clearly readable afterwards.
The following information shall be stamped on each item:
- Trademark of manufacturer
- Type of tower (for example TMH2 T)
- Item number
The height of letters or numbers will be 12 – 20 mm.
The example of marking see annexure 6a.
Bolts marking:
The bolts will be marked according to ASTM-A 394 Type 0 and in addition
manufacturer name or trade mark.
9. Testing after manufacture
9.1 At the end of production before sending to galvanizing, the manufacturer must
check geometric dimensions of the items, location holes, bending angles and
etc.
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All tests should match the requirements of drawings and specification, if there
were discrepancies, required to repair or replace the items.
9.2 The successful Bidder that supply in the past tower types that mentioned in
the tender for IEC is free from prototype assembly.
9.3 For manufacturers that didn't supply the towers for IEC– before first
supply and before galvanizing - A trial assembly of the prototype of each type
of structures, including all body crossarms and all leg extension, shall be made
prior to bulk fabrication to prove accuracy of details and fabrication,
see ann. 10. Assembly will be maid lying in horizontal position plus
supporting as needed.
Remaining of mismatched holes will not be permitted.
A reasonable amount of drifting will be allowed in assembling.
The bolts for shop assembly can be any bolts that fit by diameter and length.
Instruction for steel structure connections with bolts, see ann. 7.
Shop assembled parts shall be dismantled for shipment.
Shop assembly shall be controlled and approved by the I.E.C.
The IEC reserves the right to obtain from any lot of material being fabricated,
sample coupons for independent testing by a IEC laboratory and to reject any
lot of material, for which such tests fail to meet Specification requirements.
10. Galvanizing
Galvanizing plant has a valid ISO 9001 certificate. The certificate shall be valid for hot
deep galvanizing of steel.
Galvanizing will be according to ASTM A123/A 123M-09, or EN ISO 1461:2009.
Except where specified to the contrary all steel used in the construction of towers shall
be galvanized after all sawing, shearing, drilling, punching, filling, bending and
machining is completed. The zinc coating is to be of uniform thickness, clean, smooth
and as free from spangles as possible. Galvanizing shall be applied by the hot deep
process and shall consist of 0.085 mm in thickness for steel more than 8 mm of
thickness and 0.07 mm for steel from 5 to 8 mm thickness.
All holes will be free after galvanizing, min. free hole will be:
14 mm for 1/2 " bolt
17 mm for 5/8 " bolt
20.5 mm for 3/4 " bolt
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Specification NCS 232
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23.5 mm for 7/8 " bolt
26.5 mm for 1" bolt.
A manufacturer's Certificate of Inspection for hot–dip galvanized coatings on structural
steel (see annexure 11) shall include the following information:
- Purchase order number
- Date of inspection
- Number of pieces tested for weight of zinc coating with maximum, minimum and
average weights of each.
- Number of pieces tested for adherence of coating
- Number of rejections because of defective coating and other reasons
Certified test reports shall be submit to IEC, see para. 14.
11. Packing
All items of tower will be dismantled except the crossarms for towers, according the
drawings.
All items of each part of tower (Element 1, Element 2, ...) will be placed in separate
bundles according to fabrication drawings (Material packing table). Bundles of steel
angles shall be properly tied together: long items will be placed underneath, small angles
will be above. All bundles will be placed on a wood skeleton platform (consisting of
deck boards and runners) and secured with double 6 mm thick galvanized steel strips at
least in 3 places. Deck board shall have a minimum thickness of 25 mm.
Crossarms will be assembled with bolts, nuts, screw washers acc. the drawings and
ann.7.
The hangers and the vertical diagonals will be tied to a crossarm leg with double 6 mm
thick galvanized steel strips at least in 3 places - ann.15.
Each packing shall contain a packing list with part drawing and circle around each item
that is in the package, see annexure 12. Packing list will be in a waterproof envelope.
All the plates will be packed separately in boxes. The plates will be threaded on
galvanized wire 4 mm thick. An identification tag and box marking will be threaded on
the same wire. There will be a separate tag for each part of the tower. The boxes will be
closed.
Each tag will include the following information:
Name of manufacturer
Country of manufacture
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IEC Catalogue number
Type of tower
Name of part of the tower
List of items marked on drawing
No. of Order
Bundle Weight (kg).
Example of tag see annex.12.
Packing control & tests:
Manufacturer will control the contents of the package. Manufacturer makes sure by tests
that all the items of tower/part are packed and it will not be missing elements in package.
Control processes should be documented and transmit with delivery of goods.
IEC will check in random base content of packages according to the relevant drawing
and attached packing list.
Care must be taken during handling and shipping to avoid damage to the elements and to
galvanization.
Transportation will be via sea and then land transportation - approximately 100 km from
the port to IEC warehouse. Each IEC catalogue item will be separated in such way that it
will be possible to identify it in warehouse.
Contractor will send two copies of packing lists for each shipment to IEC Head Office.
12. Quality assurance
Manufacturer's Quality Assurance Program shall meet the requirements
described in ISO 9001.
13. Quality Control
Quality Control requirements will be according to I.E.C. Standard Q-APP-02 ED.4 and
annex. E.
14. Delivery approval conditions According to the schedule described in Chapter 16
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14.1 The successful bidder will submit list of steel manufacturers and their Valid ISO
9001certificates. The certificate shall be valid for the scope of activities
requested in the request of proposal.
14.2 The successful bidder will submit list of bolts manufacturers and their Valid
ISO 9001certificates. The certificate shall be valid for the scope of activities
requested in the request of proposal.
14.3 The successful bidder will submit welding Procedure Specification WPS and
welding personnel qualification (welders, welding operators, and tack
welders).
14.4 The successful bidder will submit materials tests certificates for IEC approval
in two month from starting point (see para.15) for first delivery and month
before the shipment of each delivery.
IEC approval will take one week.
14.5 In two months from starting point (see time schedule para.15) The successful
Bidder shall propose a Local Subcontractor, who will be responsible for
services written in para.15, for IEC approval.
Documents provided from Local subcontractor:
- Declaration that subcontractor has experience in manufacture of
steel constructions at least for 2 years during 5 last years.
- Documents that prove that the subcontractor has his own equipment for
punching, drilling, cutting and welding.
IEC will check the proposed subcontractor and in one week final
approval will be furnished up to 3 month from starting point.
14.6 The successful bidder will receive IEC approval for shop assembly in one week
up to 3 month from starting point.
14.7 The successful bidder will sent to the IEC before delivery the following test
certificates: Certificates of inspection on welds, test certificates for
fabrication, test certificates for galvanizing and packaging inspection
certificates.
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14.8 If the required prototype assembly, the successful bidder shall schedule and
location of the assembly to IEC, about six weeks before the deadline,
IEC or its representatives shall have the right to be present,
The successful bidder will film the assembly, issue a report and send to the IEC,
the IEC's approval will be possible to dismantling the assembly and send
galvanization.
Acceptance test
The I.E.C. reserves the right to verity the compliance of the delivered items
with this specification.
Delivery which will not pass acceptance test will be rejected.
15. Service during warranty period
In case of defects that can occur, for instance:
- Missing elements
- Manufacture of element is not accurate – tolerances, holes, length, wrong profile
etc.
- Damage from transportation etc.
- Where galvanizing is damaged from any cause, at the option of the IEC, the
damaged steel is to be either re-galvanized or the bare metal to be painted over with at
least two (2) coats of an approved zinc rich paint to afford protection equivalent to
galvanization
The successful Bidder shall provide (by subcontractor or by himself) the following
services: repairing of elements, manufacture of missing or damaged or defective parts.
The Representative of the Bidder in Israel (Local subcontractor) shall be on site within
24 hours of written notification.
New element or repaired one will be supplied within 48 hours.
It will be repaired, at no extra charge.
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16. Time schedule for Materials, Welding procedure and
subcontractor approval
Remarks:
1. Starting point is the date on which a binding contractual obligation has been created,
as specified in the invitation to submit proposal.
2. Total schedule for all procedures up to 3 month from starting point
16151413121110987654321STAGENo.
Submit list of steel manufactures1
IEC approval steel manufacturer2
Submit list of bolts manufactures3
IEC approval of bolst manufacturers4
Submit welding procedure5
IEC approval of welding procedure6
Materials certificates tests7
IEC approval certificates tests8
Propose the Local subcontractor9
IEC approval of subcontractor10
Manufacturer shall inform end prototype assembly11
Prototype shop assembly11
Manufacturer shall inform end prototype assembly12
IEC shop assembly approval13
Week
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National Network Unit
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Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :19 of 42
19
Appendix "A " - Questionnaire for manufacturer
Please fill in the questionnaire:
General: _ Manufacturer / Fabricator Name:
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________ Company's Address :
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
Tel no. _____________________________________________________
____________________________________________________________
Email________________________________________________________
____________________________________________________________
web.site_____________________________________________________
____________________________________________________________
FAX________________________________________________________
____________________________________________________________
Contact person _________________________________________________
____________________________________________________________
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :20 of 42
20
1. Requirements from manufacturer
Requirements Required Data offered by
Bidder
1 Statement of manufacturing
experience, see para. 3
required Yes/No
2 List of Automatic/computerized
machinery suitable for cutting
Punching and drilling, see para.6
required Yes/No
3 Quality assurance, see Para. 12 ISO 9001 Yes/No
4 Quality Control System, see
Para.13 required
5 Storage area for shop assembly MIN 1000 sq m for 161 kV
towers
MIN 2000 sq m for 400 kV
towers
6 Storage area size for raw
materials and for finished
production
MIN 1000 sq m
7 Welding equipment description
required
8 Quantities of Fork – lifts, cranes
required
9 Quantities of Manpower –
technical personnel – engineer
level, and employees for towers
manufacturing.
At least one engineer and
one technician
10 Manufacture capability (tons per
month) MIN 100 ton per month
11 Specify Welding Procedure
Specification WPS qualification required Yes/No
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :21 of 42
21
and the qualification tests by all
welding personnel, see Para. 6
i)
APPENDIX "B": STATEMENT OF MANUFACTURING EXPERIENCE
I, ________________ (enter name), hereby state the following:
1. I_________(enter name) , am authorized to sign this statement on behalf of_________
("the Manufacturer").
2. I hold the position of ____________________ ____________________________ (enter
job title and description, i.e. partner, production manager, sales manager, etc.) at the
Manufacturer.
3. I have been in this position since __________ (enter date).
4. I am providing this statement with regards to I.E.C's tender number ____________ ("the
Tender").
5. The facts/details given in this statement have been checked and verified by me.
6. _________________ The manufacturer factory is active and has at least 2 years (in the
last 5 years) of proven experience for the lattice steel towers manufacturing. Capability
of manufactured steel lattice towers at least - 900 ton per year.
7. _________________ The manufacturer has own or rents CNC machinery suitable for
cutting, punching and drilling for profiles and plates.
I hereby undertake to provide, upon IEC's request and at its sole discretion, any
Other documents (reference list, quantity, dates of supply, letter of
Recommendations etc.), or other Information requested for this tender for
purposes of proving said experience.
_______________
Signature
_______________
Date
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :22 of 42
22
Appendix "C " - ADJUSTMENT TO THE SPECIFICATION NCS-232
OBLIGATION
1. We ………………………………………………., hereby declare that the
proposal fully meets all requirements of present specification and fabrication
drawings.
2. We ………………………………………………., hereby declare that raw
materials - steel and bolts, purchased from manufacturers (who have Valid
ISO 9001 certificates) to be approved after winning by the IEC.
3. We ………………………………………………., hereby declare that we will
employ by the Contract Israeli subcontractor for services as written in para.14
(only for Foreign contractor), in case of winning the tender.
Signed: __________________________________________________
Name: ____________________________________________________
Duly authorized to sign this Obligation: __________________________
Dated on ____________________________________________________
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :23 of 42
23
Appendix "D" – annexure 1-15 (without 9)
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :24 of 42
24
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :25 of 42
25
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :26 of 42
26
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :27 of 42
27
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :28 of 42
28
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :29 of 42
29
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :30 of 42
30
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :31 of 42
31
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :32 of 42
32
Annex No. 11 – Hot plating of Zinc, Process control Objective
The purpose of this annex is to define the means of control and treatment of parts that go
through Zinc coating, in order to guarantee final product quality and reliability within a
corrosive environment.
1. General
In order to guarantee adequate control of the process it is necessary to establish a
quality control system and document all stages of the process with regards to each
batch of parts that undergo the coating. The contractor shall appoint a trustee, whom
is responsible for the maintenance of the system described above and in addition shall
document all activity aimed at guaranteeing final product quality, delivered to IEC as
described below.
2. Process Control
The manufacturer shall submit to IEC quality control full documentation with regards
to all the process stages. The documentation shall include the following information
regarding each process stage:
A. Type and concentration of materials as well as measurement method and control.
B. Process temperature and means of measurement.
C. Process duration and means of measurement.
D. Criteria which define adequate completion of any given process stage and its
progress towards subsequent treatment.
E. Production line maintenance procedures: methods of inspection, concentration
levels of active material components and documentation of the findings, frequency of
inspection\monitors, documentation of introduction of materials to the bath etc.
3. Documentation
3.1 Documentation shall be performed by means of a "route card", located within
proximity to the batch and associated with each and every stage of the process: clean,
rinse and flux, dry, soak in Zinc, cool, etc. Matching between identification/marking
of a given batch and the corresponding documentation must be ensured.
3.2 A contractor representative shall provide his/her signature indicating proper and
completion of the specific process stage.
3.3 The signed certificates shall be submitted to IEC quality control prior to delivery
of the batch for approval.
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :33 of 42
33
4. Final Inspection
4.1 The manufacturer shall establish and document criteria, based upon relevant and
approved standards (such as Israeli standard 918, 265 etc.), in order to enable
acceptance\rejection of the final product.
4.2 Inspected products shall be marked or labeled as "approved", "further processing
required" etc. The label must include the date, batch number and a distinct signature
of the inspector.
4.3 Corrective action – the manufacturer shall establish procedures for corrective
action in the event of defects revealed during inspection of the final product,
including root cause identification, means of fixing the defect, approval and
documentation.
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :34 of 42
34
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :35 of 42
35
Annexure 13
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :36 of 42
36
Annexure 14
Tower Type IEC Ca. No.' Description Drawing No.' MSR2G --- Tower structure layout NCD6320_EN
5227199 Standard tower without head NCD6320_EN including NCD6321_EN,
NCD6322_EN, NCD6323_EN ,NCD6324_EN,
NCD6325_EN
5227310 Head 3.0m NCD6735_EN
5270120 Head 4.5m NCD6331_EN
5227350 Extension No.'1 3m NCD6326_EN
5227351 Extension No.'1 6m NCD6327_EN
5227345 Extension No.'2 3m NCD6328_EN
5227347 Extension No'.2 6m NCD6329_EN
5227348 Extension No.'3 6m NCD6330_EN
5253427 Upper extension 3m NCD7991_EN
4132700 Upper middle and lower
unindependant crossarm 4.2m
NCD3366_EN
5253452 Unindependant crossarm for
earthwire 2.6m
NCD7992_EN
MMSH2 --- Tower structure layout NCD3355_EN
5267716 Tower without head NCD3355_EN including JDHK3357_EN,
JDHK3358_EN, JDHK3359_EN
,JDHK3360_EN, JDHK3361_EN
4137337 Head 3m NCD3356_EN
4055083 Extension No.'1 3m NCD3112_EN
4054888 Extension No.'1 6m NCD3109_EN
4111621 Extension No.'2 3m NCD3313_EN
5270057 Upper extension 3m NCD8683_EN
4132791 Tow-sides asymmetric
crossarm 3.75+4.65m
NCD3365_EN
4132700 Upper middle and lower
unindependant crossarm 4.2m
NCD3366_EN
5253452 Unindependant crossarm for
earthwire 2.6m
NCD7992_EN
TMH2G --- Tower structure layout NCD5160_EN
5000546 Tower without head NCD5160_EN including NCD5161_EN,
NCD5162_EN, NCD5163_EN ,NCD5164_EN,
NCD5165_EN
4513255 Head 3.0m NCD4845_EN
4513263 Head 6.5m NCD4844_EN
5253369 Upper extension 4m NCD7965_EN
5253451 Unindependant crossarm for
earthwire 2.6m
NCD7966_EN
5000548 Extension No.'1 3m NCD5166_EN
5000547 Extension No.'1 6m NCD5167_EN
5011382 Extension No.'1 9m NCD5168_EN
5011383 Extension No'.2 6m NCD5169_EN
5273847 Straight extension 3m NCD8851_EN
4143582 Upper middle and lower
unindependant crossarm 4.2m
NCD3399_EN
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :37 of 42
37
Tower Type IEC Ca. No.' Description Drawing No.'
TMH2T --- Tower structure layout NCD3437_EN
5010491 Standard tower without head NCD3437_EN including NCD3416_EN,
NCD3417_EN, NCD3418_EN ,NCD3419_EN,
NCD3420_EN
4513255 Head 3.0m NCD4845_EN
4513263 Head 6.5m NCD4844_EN
4162079 Extension No.'1 3m NCD3421_EN
4102364 Extension No.'1 6m NCD3268_EN
5253387 Upper extension 4m NCD7968_EN
4144119 Upper middle and lower
unindependant crossarm 5m
NCD3406_EN
5253386 Unindependant crossarm for
earthwire 3.4m
NCD7967_EN
5253451 Unindependant crossarm for
earthwire 2.6m
NCD7966_EN
TMC2G --- Tower structure layout JDHK9080_EN
3549920 Standard tower without head JDHK9080_EN including JDHK9081_EN,
JDHK9082_EN, JDHK9083_EN ,JDHK9084_EN,
3850419 Straight extension 3m NCD2600_EN
5269111 Head 6 m JDHK9089_EN
3166519 Extension 3m JDHK9085_EN
3166493 Extension 6m JDHK9086_EN
3663036 Upper and lower
unindependant crossarm 4m
JDHK9087_EN
3663044 Middle unindependant
crossarm 4.5m
JDHK9088_EN
Branching
tower
TMH2T
--- Tower structure layout NCD7795_EN
5255190 Standard tower without head NCD7795_EN including NCD7773_EN,
NCD7775_EN, NCD3418_EN ,NCD3419_EN,
NCD3420_EN
5255203 Straight extension 4m NCD7774_EN
5255202 Head 6.5 m NCD7772_EN
5255200 Head 3 m NCD8070_EN
5255201 Head 1.6 m NCD8071_EN
4144119 Upper middle and lower
unindependant crossarm 5m
NCD3406_EN
5255584 Upper middle and lower one
dide crossarm 5m
NCD8080_EN
5253387 Upper extension 4m NCD7968_EN
5253386 Unindependant crossarm for
earthwire 3.4m
NCD7967_EN
5256563 Additional steel to connect
one side crossarm
NCD8127_EN
2487585 Branching plates JDHK8981_EN
4162079 Extension 3m NCD3421_EN
4102364 Extension 6m NCD3268_EN
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :38 of 42
38
Tower Type IEC Ca. No.' Description Drawing No.' TMH2T air
terminal with
termination in
20º inclined
--- Tower structure layout NCD7900_EN
5268679 Standard tower without head NCD7900_EN including
NCD7901_EN, NCD7902_EN,
NCD7903_EN ,NCD7904_EN,
NCD7905_EN
4513255 Head 3.0m NCD4845_EN
4513263 Head 6.5m NCD4844_EN
5239610 Extension 3m NCD7386_EN
5268850 Extension 6m NCD7906_EN
5268851 Extension 9m NCD7913_EN
5268854 unindependant crossarm no.' 1 NCD7907_EN
5268871 unindependant crossarm no.' 2 NCD7908_EN
5268559 unindependant crossarm no.' 3 NCD7909_EN
5268558 unindependant crossarm no.' 4 NCD7910_EN
5268874 Device of cable drop and parts for
cable fixing – zone "A"
NCD7912a_EN
5268875 Device of cable drop and parts for
cable fixing – zone "B"
NCD7912b_EN
5268876 Device of cable drop and parts for
cable fixing – zone "C"
NCD7912c_EN
5268877 Device of cable drop and parts for
cable fixing – zone of extension 6m
NCD7912d_EN
5241899 Device of cable drop and parts for
cable fixing – zone of extension 3m
NCD7251e_EN
5268878 Device of cable drop and parts for
cable fixing – zone of extension 9m
NCD7912f_EN
TMC2G adjusted for
air terminal
with
termination in
20º inclined
--- Tower structure layout NCD7297_EN
5220910 Standard tower NCD7297_EN including
JDHK9089_EN, NCD7545_EN,
NCD9155_EN ,NCD9156_EN,
3166519 Extension 3m JDHK9085_EN
3166493 Extension 6m JDHK9086_EN
3663036 Upper and lower unindependant
crossarm 4m
JDHK9087_EN
5220897 Crossarm for air terminal NCD3710_EN
5220898 Drops and fixing cables "TAIHAN" –
zone of tower
NCD6484_EN
5241170 Drops and fixing cables "TAIHAN" –
zone of extension 6m
NCD7480_EN
5241172 Drops and fixing cables "TAIHAN" –
zone of extension 3m
NCD7479_EN
5221454 Lightning defenders hanging
arrangement "SIEMENS"
NCD6719_EN
5221527 Tension arrangement on crossarm NCD4184a_EN
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :39 of 42
39
Tower Type IEC Ca. No.' Description Drawing No.'
DSG2G --- Tower structure layout JDHK8800_EN
2797124 Standard tower JDHK8800_EN including
JDHK8801_EN, JDHK8802_EN,
JDHK8803_EN ,JDHK8804_EN,
JDHK8805_EN, JDHK8806_EN
,JDHK8807_EN
4486221 Standard tower without element no.' 7 JDHK8800_EN including
JDHK8801_EN, JDHK8802_EN,
JDHK8803_EN ,JDHK8804_EN,
JDHK8805_EN, JDHK8806_EN
2797132 Extension No.'1 3m JDHK8808_EN
2797157 Extension No.'1 6m JDHK8809_EN
3662657 Earthwire crossarm unindependent
for assembly 5.5m
JDHK8810_EN
3662665 Upper and lower crossarm
unindependent for assembly 10.7m
JDHK8811_EN, JDHK8811a_EN
3662673 Middle crossarm unindependent for
assembly 11.5m
JDHK8812_EN, JDHK8812a_EN
3505401 Upper and lower crossarm
unindependent for assembly 7.5m
NCD1057_EN, NCD1057a_EN
3505419 Middle crossarm unindependent for
assembly 8.5m
NCD1058_EN, NCD1058a_EN
DTG2G --- Tower structure layout JDHK8820_EN
2797215 Standard tower JDHK8820_EN including
JDHK8821_EN, JDHK8822_EN,
JDHK8823_EN ,JDHK8824_EN,
JDHK8825_EN JDHK8826_EN
,JDHK8828_EN
3340254 Standard tower without element no.' 7 JDHK8820_EN including
JDHK8821_EN, JDHK8822_EN,
JDHK8823_EN ,JDHK8824_EN,
JDHK8825_EN JDHK8826_EN
2797256 Extension No.'1 6m (-3) JDHK8829_EN
2797272 Extension No.'2 6m (+3) JDHK8830_EN
3692837 Crossarm for earthwire 5m JDHK8831_EN, JDHK8831a_EN
3692977 Crossarm for earthwire 8.5m JDHK8834_EN, JDHK8834a_EN
3692951 Upper and lower crossarm
unindependent for assembly 6.5m
JDHK8832_EN, JDHK8832a_EN
3692985 Upper and lower crossarm
unindependent for assembly 11m
JDHK8835_EN, JDHK8835a_EN,
3692969 Middle crossarm unindependent for
assembly 7.5m
JDHK8833_EN, JDHK8833a_EN,
3692993 Middle crossarm unindependent for
assembly 12m
JDHK8836_EN, JDHK8836a_EN
5011770 Upper and lower crossarm
unindependent for assembly 7.8m
NCD5830_EN, NCD5830a_EN
5011774 Middle crossarm unindependent for
assembly 8.8m
NCD5831_EN, NCD5831a_EN
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :40 of 42
40
Annexure 15
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :41 of 42
41
ANNEXURE "E" - ITP for Overhead lines steel lattice towers
No. Inspection activities/ Part
examined Document
Inspection by Applicable
Standards Remarks
Sup IEC
Raw material, Workshop procedures, WPS and PQR.
1 Raw material chemical comp.,
mechanical prop.
Material certificate, MTR
IEC National Grid Spec.
H H
Documented
as per EN
10204 3.1, part
of final
documentation
.
Shall be verified by
IEC Metallurgic
Laboratory.
All hot galvanized
steel shall contain
less than 0.04% or
0.12% - 0.25%
silicon
2 WPS and PQR (if applicable)
NDT procedures
Work procedure,
Workforce certificate
H H
As per Spec.
Welders will
be certified for
weld fillet and
tangent
welding
Has to be approved
by IEC Metallurgic
Laboratory.
In-Process Inspection
3 Approved manufacturing
drawing. Machine tools
alignment.
IEC Spec., Supplier work
procedures. R SW
At least 10% of
parts.
4 Visual Inspection of parts,
Geometric measurements.
IEC spec., Approved
drawings R SW At least 10% of
parts.
5 Visual inspection of welds.
NDT (if needed)
IEC spec., Approved
drawings
H SW
AWS D1.1 At least 10% of
parts.
NDT results has to
be approved by IEC
Metallurgy
Laboratory.
6 Full Assembling of one of each
type of tower
IEC spec., Approved
drawings H H
IEC Spec.,
Approved
drawings
Galvanization 7 Visual inspection.
Thickness measurement.
IEC spec., Approved
drawings
H SW
IEC Spec.,
Suppl. Records
At least 10% of
parts.
Repair if needed,
must be approved
by IEC before
conducting.
8 Packing, Final documentation. IEC spec., Parts Packing
Lists H H
IEC Spec.,
Suppl. Records
At least 10% of
packing shall be
verified.
R - Quality Record W - Witness Point
H - Hold Point
SW - Sample Witness
Point
Israel Electric Corp. Ltd.
Marketing Division
National Network Unit
Overhead Lines Department
Specification NCS 232
FOR TRANSMISSION LATTICE
TOWERS FABRICATION
Edition no.: 2
Issue date: MAY 2017
Page no. :42 of 42
42
Revisions:
1.
Appendix "B" – updated.
Added Annexure 13 – bolts dimensions
.Para. 8 - Marking changed , Annexure 6a changed
Added Annexure 14 – IEC Ca. No.'
Added Annexure 15 – Example for crossarm, packing view.
2. Annexure 14 - updated.
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