REVISIONS. App Sud. App Thom. App PC AA 2011/12/09 AA 2012/07/19 AA 2013/02/28 AA 2013/10/18 AA 2013/11/27 AA 2013/11/29 AA 2014/03/06 AA 2014/12/17

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1 - FABRICATION 1/12 REVISIONS Rev Description Document format and number changed. Previous number Associated Drawings added See REV note 2 Associated Drawing for Ladders added See REV note 3 Rev n by 2011/12/ /07/ /02/28 4 See Appendix A 2013//18 App Sud 2011/12/ /07/ /02/ //18 App PC App Thom App VB App LH App Clyd Appr Act Issue Date YYYY/MM/DD Pending Pending Pending Pending Pending Pending 2012/04/30 Pending Pending Pending Pending Pending Pending 2012/07/20 Pending Pending Pending Pending Pending Pending 2013/02/28 Pending Pending Pending Pending Pending Pending 2013//18 5 Minor Drawing Revision See Appendix A 2013/11/ /11/27 Pending Pending Pending Pending Pending Pending 2013/11/27 6 Associated Drawings added See REV note /11/ /11/29 Pending Pending Pending Pending Pending Pending 2013/11/29 7 Minor Drawing Revision See Appendix A 2014/03/ /03/06 Pending Pending Pending Pending Pending Pending 2014/03/17 8 Safety Gate Added See Appendix A 2014/12/ /12/17 Pending Pending Pending Pending Pending Pending 2014/12/17 9 Kick Plate Dimensions See Appendix A 2015/03/ /03/04 Pending Pending Pending Pending Pending Pending 2015/03/04 General Review 2015 See Appendix A 2015/07/ /07/22 Pending Pending Pending Pending Pending Pending 2015/07/22 Sud = Sudbury, Ontario, PC = Port Colborne, Thom = Thompson, Manitoba, VB = Voisey s Bay, LH = Long Harbour, Act = Acton, England, Clyd = Clydach, Wales, N/A = Not Applicable

2 - FABRICATION 2/ PURPOSE This specification describes the minimum requirements for the fabrication of steelwork. This specification supplements the requirements of the Ontario Occupational Health and Safety Act and its Regulations, The Ontario Building Code, CSA Standard CAN/CSA-S16.01 (latest edition) and CISC handbook of Standard Practice for Structural Steel. 2.0 APPLICATION This specification, applies at any Vale locations indicated with approval on the cover page, with the following exceptions: 2.1 EXCEPTIONS None. 3.0 REFERENCE DOCUMENTATION The following documents were used in the development of this document or have instructions and procedures applicable to it. They shall be used in their most recent revision. SPEC SPEC SPEC SPEC General Notes -steelwork Structural Steel Quality Requirements Steelwork - Erection Vendor, Fabrication, and Shop Drawing Requirements The following drawings form part of this specification: E Standard Handrail Details E Steel Access Ladders E Standard Stair Details Sheet E Standard Stair Details Sheet E Miscellaneous Details E Self-Closing Gate 4.0 DESIGN REFERENCE STANDARDS The following standards are applicable to structural design for Vale s facilities: Use the latest revision of all applicable codes and standards listed in this specification.

3 - FABRICATION 3/12 Publications referred to by this standard are those listed in CAN/CSA S16 (latest edition) - Limit States Design of Steel Structures as reference material. CSA Canadian Standards Association ASTM American Society for Testing and Materials CISC Canadian Institute of Steel Construction NMM MBG - National Association of Architectural Metal Manufacturers Metal Bar Grating OSHA OBC Occupational Health and Safety Act Regulations for Mines and Mining Plants O.Reg 854 Ontario Building Code 5.0 MATERIALS In accordance with the following, unless specified otherwise in the contract documents: 5.1 STRUCTURAL STEEL SHAPES, PLATES AND BARS CAN/CSA G General Requirements for Rolled or Welded Structural Quality Steels and CAN/CSA G W Structural Quality Steels. ASTM A572 or A992 Gr.50 Structural steel for section not manufactured in Canada. Steel Plates, Angles and channels: CAN/CSA G W. Steel Bars (square or round) to be hot rolled and in accordance with Can3-g312.1 and Can3-G312.2 Grade 300W. 5.2 HOLLOW STRUCTURAL STEEL SECTIONS CAN/CSA G W Class H (class C with written approval by the Vale Representative). 5.3 USE NEW MATERIALS Use new materials, free from defects impairing strength, durability and appearance.

4 - FABRICATION 4/ BOLTS, NUTS AND WASHERS - ASTM A325 high-strength bolts for structural steel joints including ASTM A563 heavy hex nuts and suitable plain hardened washers as required.. - ASTM F436 hardened washers for oversized and short slotted holes. - CAN/CSA G W plate washers with minimum thickness of 5/16" for all slotted holes. - Bevelled washers to be used on beveled surfaces such as C - channels and S- shapes. 5.5 WELDING ELECTRODES CSA Standard W CHECKERED PLATE Raised pattern plate, commercial quality of thickness as indicated in the contract documents. Minimum thickness of checkered plate to be 5/16. The raised pattern of the checkered plate not to be included in the structural thickness. 5.7 FLOOR GRATING Grating to be standard welded type, size of gratings to be as shown on the contract documents. The minimum bearing bar size to be used shall be at least 1 1/4" x 3/16 "... Interconnect bearing bars at ends in each panel with banding bars 1/4" smaller in depth than bearing bars for trench grating and at all cutouts and openings. Use serrated grating in slippery areas, ramps and all exterior platforms and stairs. Overall depth of serrated grating is to be increased by the depth of the serrations. 5.8 STAIR TRES Fabricate from specified grating, with checkered plate nosing unless specified otherwise in the contract documents. Stair threads to be bolted to the stair stringers (welding is not acceptable).

5 - FABRICATION 5/12 Bearing Bar Size Maximum Length of Tread 1 1/4" x 3/16" (32 mm x 4.8 mm) 3' - 0" (914 mm) 1 1/2" x 3/16" (38 mm x 4.8 mm) 4' - 0" (1219 mm) 6.0 GENERAL Fabricate in accordance with CAN/CSA-S16 (latest revision) and the CISC Code of Standard Practice for Structural Steel. Shop drawings must be reviewed by the Design Engineer in accordance with SPEC-08012, prior to fabrication. Assemble work in shop as much as practicable, making inconspicuous connections and clearly marking surfaces for re-assembly on site. All welding is to be in accordance with CSA Standard W Identify structural steel members with neatly painted erection marks. Do not splice rolled sections or welded wide flanges used as beams or columns, unless approved in writing by the Vale Representative. Make splices full strength and submit details to the Vale Representative for review prior to fabrication. Splice details of beam or column splices to be prepared and sealed by a Professional Engineer registered in the jurisdiction where the steelwork is being constructed. Provide necessary inserts, framing and connections to properly secure metal work to concrete, masonry, structural steel framing or other parts of the structure, and other items necessary to provide the complete installation of the work. Fabricate miscellaneous items to be set in place as components, having size and weight suitable for the erection conditions. Prior to shop painting, weld masonry anchoring components to steel members as required. Coincide the layout with modular masonry coursing.

6 - FABRICATION 6/ SUBMITTALS Shop drawings, erection drawings, (and calculations on request), in PDF format, must be submitted for review to the Building Design Engineer (Vale or Consultant) prior to fabrication. See Section 9.0 for Connection Design requirements. Furnish one complete set of erection and detail drawings, in format as per Vale SPEC at the completion of steel fabrication. Submit copies of W47.1 welder s certification and procedure certification. Submit mill test reports or a written statement indicating that the materials conform to drawings and specifications. 7.1 VALE FURNISHED ITEMS Vale will furnish reproducible copy of project drawings. 8.0 SHOP DRAWINGS Shop drawings are to be in accordance with Vale SPEC The preferred sheet size is 22" x 34" sheets. Reference shop drawings to the related design drawings. Clearly show all details on the shop drawings, including: the size of steel members, dimensions, connections, anchor bolt and bearing plate locations, fabrication and erection details, and other pertinent data required for shop and field assembly. Clearly show the location of structural members, details of field welding procedures and the construction sequence on the erection drawings. 9.0 CONNECTIONS 9.1 DESIGN The Fabricator s Structural Engineer (Connection Design Engineer) is responsible for: Determining if a connection is a Standard or Non-Standard Connection For Standard Connections, verifying the correct selection from the CISC Handbook Design of Non-Standard Connections

7 - FABRICATION 7/12 Stamping of the Shop Drawings or Issuance of a signed and sealed letter to the Building Design Engineer stating that the shop and details drawings and connections have been prepared and approved under his/her supervision. The Connection Design Engineer must be a registered professional engineer licensed in the jurisdiction where the steel work in being erected. Design using Limit States Design Method as specified on the project drawings and to satisfy requirements of CSA Standard CAN/CSA-S16 (latest), and the latest edition of CISC handbook of Steel Construction. Arc welding design and practice in accordance with CSA Standard W Design double angle header connections, involving two beams framing into a column web or a beam using a common bolting system, so that at least one bolt on each side of the connection is not common. End plate connection and shear tab plate connection not to be used unless approved by Vale in writing. Design the connection of all tension and compression members for the axial forces shown on the project drawings, plus the shear force due to direct member loading, if applicable, but not less than 50 percent of the load capacity of the member. Design the connections of all flexural members, (beams, channels, etc.) for one half of the total uniformly distributed load capacity of a laterally supported beam, except where shear/moment loads are shown on the project drawings. Examine drawings to ascertain the extent of any cutting and preparatory work or modifications required to the existing steelwork and provide pertinent details. 9.2 BEARING AND SLIP-CRITICAL CONNECTIONS Use bearing type connections unless otherwise shown on the project drawings. Bolts subjected to tensile cyclic loading shall be pretension to the minimum preload values as defined in CSA S16 (latest). 9.3 GENERAL REQUIREMENTS Use 3/4" diameter ASTM A325 bolts for all connections, unless otherwise shown on the project drawings.

8 - FABRICATION 8/12 Shop connections may be bolted or welded. Use bolted field connections unless otherwise shown on the project drawings. Use double angle header connections for all simply supported beam connections including channels. Provide moment connections where shown on the project drawings. Use a minimum of 5/16" thick connection angles unless otherwise shown on the project drawings. Use minimum number of bolts per vertical line for each beam depth as follows: Beam Depth (Inch) Bolts per vertical line* * Note: Does not include erection bolt. Where connecting new steel to existing, use loose headed angles on at least one end of the member. Use not less than four bolts in each beam connection, or 2 bolts in angle bracing. Each bracing member must have at least one connection bolted. Repaired defects of structural members are subject to review and acceptance by the Vale Representative..0 COLUMN BASE PLATES Make holes in base plates 1/4" larger than bolt size for bolts up to 3/4" diameter and 7/16" larger than bolt size for bolts over 3/4" diameter up to 1 diameter. Refer to CISC Handbook of steel construction for other sizes.

9 - FABRICATION 9/12 Where base plate is resting on concrete, the dimensions of the base plate shall be sized in such way that no bearing pressure on the concrete cover. Plate to be located within the rebar cage unless other means are used to prevent bursting of concrete. Base plate thicknesses given are finished dimensions TRUSSES Fabricate trusses with connections to withstand forces indicated on the project drawings. Line up panel points of adjacent trusses with one another for ease of threading services. Provide spacers for built-up members as required by CSA Standard CAN/CSA-S16 (latest) 12.0 BUILT-UP MEMBERS Fabricate built-up members and components of built-up members in accordance with requirements of CAN/CSA S16 (latest). Built-up members include component members built-up from plates and shapes and connected by lacing, batten plates, perforated cover plates and plate interconnectors CAMBER Camber beams, trusses and girders as shown on the project drawings GALVANIZING Galvanize designated steel items with shop applied protective hot dip zinc coating in accordance with the requirements of CSA Standard G164 - latest addition, "Hot Dip Galvanizing of Irregularly Shaped Articles" PAINTING Prepare and paint with paint system and colour of finished coat as specified on the project drawings. Shop apply all paint coats unless otherwise authorized in writing by the Vale Representative. Do not paint steel surfaces that are to be embedded in concrete, or in contact with cast-inplace concrete. Do not paint contact surfaces of slip-critical type connection within 3" dia. of all bolt holes. Do not paint nonferrous metals.

10 - FABRICATION / INSPECTION, TESTING AND QUALITY CONTROL The Vale Representative may engage an inspection and testing company, during fabrication to perform complete shop inspection. Inspector may visit fabricating plant and submit reports to the Vale Representative, showing tonnage fabricated and inspected with comments on workmanship and listing of defects or inaccuracies. Cooperate fully to allow completion of inspection and testing, as may be required. Inform the Vale Representative to arrange for a steel inspection before commencing structural steel painting. Provide materials and fabrication in accordance with CSA Standard CAN/CSA-S16.(latest), and CISC Code of Standard Practice for structural steel. Perform welding in accordance with CSA Standard W59.(latest) Welds are subject to nondestructive testing as specified on the project drawings in accordance with CSA Standard W59.(latest) ALLOWABLE TOLERANCES Fabrication tolerances in accordance with CSA Standard CAN/CSA-S16 (latest) PRODUCT DELIVERY, STORAGE AND HANDLING Store all steelwork clear of ground, contaminants and muddy areas. Prevent impact to members APPENDICES Appendix A: Revision and Transition Notes Appendix B: Keywords

11 - FABRICATION 11/12 Appendix A: Revision and Transition Notes (Revisions are listed in reverse chronological order with most recent revision at the top. Revision notes describe: what was changed, why it was changed, and the plan to implement the change, including whether changes are retroactive) Revision General Review 2015 Section Steel Bar Spec Added Section Floor Grating notes added Section Stair threads to be bolted to the stair stringers (welding is not acceptable). Sections 7 and 9 - Clarifications added regarding stamping of shop drawings, to align with PEO guidelines Section 9.3 Beam Depth chart expanded Drawing E Anti-slip rung Note removed. Drawing E Detail added to Section B-B Drawing E Gate Locking System Added Revision 9 Revised drawing E CARs (RACs) requirements changed allowing the use of local codes for kick plate heights. Kick plate dimensions changed back to pre-2012 RACs requirements. Plus minor general revisions. This change is applicable to any new designs. Revised drawing E Ladder rungs now specify anti-slip to align with CARs (RACs). Plus minor general revisions. This change is applicable to any new designs. Revision 8 Added drawing E Self-Closing Gate Revised drawing E Steel Access Ladders to include gates in Details 1, 3, and 4. Also revised platform size and design in Detail 1. Also added note 8 for painting of ladder safety yellow. These changes are applicable for any new installations from this date forward, Dec 17, Revision 7 Standard detail drawing E , Detail 1 Added second timber support. Drawing E added Revision 6 Standard detail drawings E and E added. Revision 5

12 - FABRICATION 12/12 Standard detail drawing E revised Minor revision to Detail 7 Dimensions corrected. Revision 4 Statement regarding shop drawing reviews, section 6.0, re-worded for clarity Revision 3 Access ladder drawing E added to drawings list. Ladder requirements as shown on the drawing are applicable to all new designs moving forward and not applicable to existing ladders built prior to revision 3 of this specification. Highlights of changes: Ladder stringers are now L3½ x3 for all ladders Ladder rungs are now 1 dia for all ladders Cages are required on all ladders over -0 (finished floor/finished floor) Revision 2 Associated drawings added Kick plate height increased to 8 to meet RAC s requirements. This is applicable to any new designs. Revision 1 Document format and number changed due to Vale Engineering Document Program changes in Previous Standard number was Rev , steelwork fabrication Appendix B: Keywords