Attachment 6 - 05 12 00 Structural Steel.pdf

SECTION 05 12 00 Page 1

SECTION TABLE OF CONTENTS

DIVISION 05 - METALS

SECTION 05 12 00

STRUCTURAL STEEL

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 QUALITY ASSURANCE

1.3.1 Fabrication Drawing Requirements

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.2 STEEL

2.2.1 Structural Steel

2.3 BOLTS, NUTS, AND WASHERS

2.3.1 Bolts

2.3.2 Nuts

2.3.3 Direct Tension Indicator Washers

2.3.4 Washers

2.3.5 Tension Control Bolts

2.3.6 Threaded Rod

2.3.7 Hinges

2.3.8 Door Handle and Lock

2.4 GALVANIZING

2.5 FABRICATION

2.5.1 Markings

2.5.2 Shop Primer

2.5.2.1 Cleaning

2.5.3 Surface Finishes

PART 3 EXECUTION

3.1 ERECTION

3.1.1 STORAGE

3.2 CONNECTIONS

3.2.1 High-Strength Grade Bolts

3.2.2 Tension Control Bolts

3.2.3 Common-Grade Bolts

3.3 GAS CUTTING

3.4 WELDING

3.5 SHOP PRIMER REPAIR

3.5.1 Field Priming

3.6 FIELD QUALITY CONTROL

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SECTION 05 12 00 Page 2

SECTION 05 12 00

STRUCTURAL STEEL

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 303

(2016) Code of Standard Practice for Steel

Buildings and Bridges

AISC 325 (2017) Steel Construction Manual

AISC 326 (2009) Detailing for Steel Construction

AISC 341 (2016) Seismic Provisions for Structural

Steel Buildings

AISC 360

(2016) Specification for Structural Steel

Buildings

AISC 420 (2010) Certification Standard for Shop

Application of Complex Protective Coating

Systems

AISC DESIGN GUIDE 10 (1997) Erection Bracing of Low-Rise

Structural Steel Buildings

AMERICAN SOCIETY FOR NONDESTRUCTIVE TESTING (ASNT)

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B46.1 (2020) Surface Texture, Surface Roughness, Waviness and Lay

ASTM INTERNATIONAL (ASTM)

ASTM A36/A36M

(2019) Standard Specification for Carbon

Structural Steel

ASTM A123/A123M (2017) Standard Specification for Zinc

(Hot-Dip Galvanized) Coatings on Iron and

Steel Products

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ASTM A563M

ASTM A449

(2007; R 2013) Standard Specification for

Carbon and Alloy Steel Nuts (Metric)

(2020) Standard Specification for Hex Cap

Screws, Bolts and Studs, Steel, Heat

Treated, 120/105/90 ksi Minimum Tensile

Strength, General Use

ASTM A992/A992M

(2020) Standard Specification for

Structural Steel Shapes

ASTM B695

(2004; R 2016) Standard Specification for

Coatings of Zinc Mechanically Deposited on

Iron and Steel

ASTM F436/F436M

(2019) Standard Specification for Hardened

Steel Washers Inch and Metric Dimensions

ASTM F959/F959M (2017a) Standard Specification for

Compressible-Washer-Type Direct Tension

Indicators for Use with Structural

Fasteners, Inch and Metric Series

ASTM F2329/F2329M (2015) Standard Specification for Zinc

Coating, Hot-Dip, Requirements for

Application to Carbon and Alloy Steel

Bolts, Screws, Washers, Nuts, and Special

Threaded Fasteners

ASTM F2833

(2011; R 2017) Standard Specification for

Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum

Organic/Inorganic Type

ASTM F3125/F3125M (2019) Standard Specification for High

Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch

Dimensions 120 ksi and 150 ksi Minimum

Tensile Strength, and Metric Dimensions

830 MPa and 1040 MPa Minimum Tensile

Strength

SECTION 05 12 00 Page 4

SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC PA 1 (2016) Shop, Field, and Maintenance

Coating of Metals

SSPC Paint 20 (2019) Zinc-Rich Primers (Type I, Inorganic, and Type II, Organic)

SSPC Paint 29 (2002; E 2004) Zinc Dust Sacrificial

Primer, Performance-Based

SSPC SP 3 (2018) Power Tool Cleaning

SSPC SP 6/NACE No.3 (2007) Commercial Blast Cleaning

U.S. DEPARTMENT OF DEFENSE (DOD)

UFC 3-301-01 (2019) Structural Engineering

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR Part 1926, Subpart R Steel Erection

1.2 SUBMITTALS

Government approval is required for submittals with a "G" classification.

Submittals not having a "G" classification are for information only. Submit the following in accordance with the Scope of Work:

SD-01 Not Used

SD-02 Shop Drawings

Fabrication Drawings Including Details of Connections; G

SD-03 Product Data

Shop Primer

Direct Tension Indicator Washers

Tension Control Bolts

Hinges

Door Handle/Lock/Lever

SD-04 Not Used

SD-05 Test Reports

Bolts, Nuts, and Washers

Direct Tension Indicator Washer Inspection Reports

SD-06 Certificates

Steel

Bolts, Nuts, and Washers

SECTION 05 12 00 Page 5

Galvanizing

SD-07 Not Used

1.3 QUALITY ASSURANCE

1.3.1 Fabrication Drawing Requirements

Submit fabrication drawings for approval prior to fabrication. Prepare in accordance with AISC 303, AISC 326, AISC 325, and AISC 360. Fabrication drawings must not be reproductions of contract drawings. Include complete information for the fabrication of the structure's components, including the location, type, and size of bolts, member sizes and lengths, connection details, blocks, copes, and cuts. Clearly highlight any deviations from the details shown on the contract drawings highlighted on the fabrication drawings. Explain the reasons for any deviations from the contract drawings.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Provide the structural steel system, including shop primer, galvanizing, complete and ready for use. Provide structural steel systems including design, materials, installation, workmanship, fabrication, assembly, erection, inspection, quality control, and testing in accordance with AISC

303, AISC 360, AISC 341, and UFC 3-301-01 except as modified in this contract.

2.2 STEEL

2.2.1 Structural Steel

Wide flange, ASTM A992/A992M. Angles, Channels and Plates, ASTM A36/A36M.

2.3 BOLTS, NUTS, AND WASHERS

Submit the certified manufacturer's mill reports which clearly show the applicable ASTM mechanical and chemical requirements together with the actual test results for the supplied fasteners.

2.3.1 Bolts

ASTM F3125/F3125M, Grade A325M A325, Type 1 Heavy Hex Head Style, plain finish for structural members (wide flange, angle, channel, and stiffener connections). Steel plate-to-column bolts/fasteners, (6mm), shall be SAE

J429-GR5 (ASTMA449 Type 1). All bolts shall have a minimum of one washer, each side of a connection (two washers per bolt minimum).

2.3.2 Nuts

ASTM A563M, Grade and Style as specified in the applicable ASTM bolt standard.

2.3.3 Direct Tension Indicator Washers

SECTION 05 12 00 Page 6

ASTM F959/F959M. Submit product data for direct tension indicator washers.

2.3.4 Washers

ASTM F436/F436M, plain carbon steel. Minimum of two washers per bolted connection (one washer on the bolt head side and one on the nut side).

2.3.5 Tension Control Bolts

ASTM F3125/F3125M, Grade F1852, Type 1, twistoff style assemblies consisting of steel structural bolts with splined ends, heavy-hex carbon steel nuts, and hardened carbon steel washers. Assembly finish must be plain. Submit product data for tension control bolts.

2.3.6 Threaded Rod

ASTM A449. All threaded rod shall contain a minimum of one (1) washer and two (2) nuts, each side. Washers can be used to shim as needed. A complete threaded rod connection contains, at a minimum, two (2) washers and four

(4) nuts.

2.3.7 Hinges

Three hinges shall be affixed to the column and door. Each hinge shall have a minimum capacity of 50kg hanging weight, and a minimum axial strength of

2,000kg. The pivot/post side shall consist of a minimum of one (1) bolt hole and be connected by a 12mm diameter, Grade A325 bolt, or better.

Hinges that contain self-anchoring bolts are acceptable if anchoring force is capable of resisting a pullout force of no less than 900kg. Coordinate bolt hole-punching locations with steel fabricator as torch cutting is strictly prohibited. Bolt holes for hinges must maintain required edge distances, 20mm from any free edge to the center of a bolt hole for 12mm diameter bolts. Hinges must contain components for adjustment, and easy disassembly, i.e. threaded rod, eye bolts, nuts, bolts. Welded components are not permitted. Eyebolts and crossbolts must be vandal-proof, and hot-dipped galvanized. Minimum height adjustments must be 14mm. Bullet-hinges and lift-off hinges are acceptable but shall bolted, as welding is prohibited. Any component(s) if the hinge (anchor, pivot, connection, etc.)

shall not obstruct or interfere with door overlap or bolt edge distances.

Coordinate all bolt holes with door appurtenances and submit for approval prior to fabrication. Material properties and test results shall be submitted for approval prior to fabrication, and installation.

2.3.8 Door Handle and Lock

Door Handle and lock must act as one component, and be operable from both sides of the door. The locking mechanism shall be gravity-operated, adjustable, and rely on the structure (inside column flange to bear against, and web to prevent from rotating downward) for anchoring/locking.

When rotated one direction, i.e. Counter Clockwise from the exterior, the door shall lock, and when rotated the opposite direction (Clockwise) the door shall unlock. Component materials shall be steel. Alternate materials such as plastic, wood, cast, or any other composite is unacceptable and

SECTION 05 12 00 Page 7 strictly prohibited. Clamp handle shall be minimum length of 100mm (4 inches) and operate (rotate) without obstruction/interference. Coordination of handle length, projection, and penetration through door must be coordinated prior to fabrication before holes are punched or drilled. 13mm

(1/2 inch) threaded rod shall act as the spindle, and washers shall be used to shim and achieve proper distances and clearances. Double nut all connections to prevent incidental rotation.

2.4 GALVANIZING

ASTM F2329/F2329M, ASTM F1136/F1136M, ASTM F2833 or ASTM B695 for threaded parts or ASTM A123/A123M for structural steel members, as applicable, unless specified otherwise galvanize after fabrication where practicable.

2.5 FABRICATION

Fabrication must be in accordance with the applicable provisions of AISC 325 and AISC 360. Fabrication must be completed in the shop to the greatest extent possible. Punch, subpunch and ream, or drill bolt holes perpendicular to the surface of the member. Any deviation from the plans or specifications is strictly prohibited.

2.5.1 Markings

Prior to erection, identify members by a painted erection mark. Connecting parts assembled in the shop for reaming holes in field connections must be match marked with scratch and notch marks. Do not locate match markings in areas that will decrease member strength or cause stress concentrations.

Affix embossed tags to hot-dipped galvanized members.

2.5.2 Shop Primer

SSPC Paint 20 or SSPC Paint 29, (zinc rich primer). Shop prime all structural steel (wide flanges, channels, angles, plates, connections, etc.)

in accordance with SSPC PA 1. If flash rusting occurs, re-clean the surface prior to application of primer. Apply primer in accordance with endorsement

"SPE-P1" of AISC 420 or approved equal NACE or SSPC certification to a minimum dry film thickness of 0.05 mm. Submit shop primer product data.

Prior to assembly, prime surfaces which will be concealed or inaccessible after assembly. Do not apply primer in foggy or rainy weather; when the ambient temperature is below 7 degrees C or over 35 degrees C; or when the primer may be exposed to temperatures below 4 degrees C within 48 hours after application, unless approved otherwise by the Contracting Officer.

Repair damaged primed surfaces with an additional coat of primer.

2.5.2.1 Cleaning

SSPC SP 6/NACE No.3, except steel exposed in spaces above ceilings, attic spaces, furred spaces, and chases that will be hidden to view in finished construction may be cleaned to SSPC SP 3 when recommended by the shop primer manufacturer. Maintain steel surfaces free from rust, dirt, oil, grease, and other contaminants through final assembly.

SECTION 05 12 00 Page 8

2.5.3 Surface Finishes

ASME B46.1 maximum surface roughness of 125 for pin, pinholes, and sliding bearings, unless indicated otherwise.

PART 3 EXECUTION

3.1 ERECTION

a. Erection of structural steel, except as indicated in item b. below, must be in accordance with the applicable provisions of AISC 325, AISC 303 and 29 CFR Part 1926, Subpart R.

b. For low-rise structural steel buildings (18 m tall or less and a maximum of 2 stories), erect the structure in accordance with AISC DESIGN GUIDE

10.

3.1.1 STORAGE

Store the material out of contact with the ground in such manner and location as to minimize deterioration.

3.2 CONNECTIONS

3.2.1 Build connections into existing work. Do not tighten anchor bolts set in concrete with impact torque wrenches. Holes must not be cut or enlarged by burning. Bolts, nuts, and washers must be clean of dirt and rust, and lubricated immediately prior to installation.

3.2.2 High-Strength Grade Bolts

Tighten ASTM A325 bolts to a "snug tight" fit. "Snug tight" is the tightness that exists when plies in a joint are in firm contact. If firm contact of joint plies cannot be obtained with a few impacts of an impact wrench, or the full effort of a man using a spud wrench, contact the

Contracting Officer for further instructions.

3.2.3 Tension Control Bolts

Bolts must be installed in connection holes and initially brought to a snug tight fit. After the initial tightening procedure, fully tension bolts, progressing from the most rigid part of a connection to the free edges.

3.2.3 Common-Grade Bolts

Tighten SAE J429-GR5 (ASTMA449 Type 1) bolts to a “snug tight” fit. "Snug tight" is the tightness that exists when plies in a joint are in firm contact. If firm contact of joint plies cannot be obtained with a few impacts of an impact wrench, or the full effort of a man using a spud wrench, contact the Contracting Officer for further instructions.

3.3 GAS CUTTING

Use of gas-cutting torch in the field for correcting fabrication errors is not permitted.

SECTION 05 12 00 Page 9

3.4 WELDING

Welding is not permitted.

3.5 SHOP PRIMER REPAIR

Repair shop primer in accordance with the paint manufacturer's recommendation for surfaces damaged by handling, transporting, cutting, welding, or bolting.

3.5.1 Field Priming

Field prime steel exposed to the weather, or located in building areas without HVAC for control of relative humidity. After erection, the field bolt heads and nuts, field welds, and any abrasions in the shop coat must be cleaned and primed with paint of the same quality as that used for the shop coat.

3.6 FIELD QUALITY CONTROL

Perform field tests, and provide labor, equipment, and incidentals required for testing. Notify the Contracting Officer in writing of defective, bolts, nuts, and washers within 7 working days of the date of the inspection.

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