Section 13121 METAL BUILDING SYSTEMS

Section 13121

METAL BUILDING SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Metal building system:

a. Building system design. b. Materials.

c. Fabrication. d. Shipment.

e. Erection of building system.

2. Miscellaneous roof systems as indicated.

B. Related Specification sections include but are not necessarily limited to:

1. Division 01, Additional General Requirements

2. Division 3, Concrete

3. Section 07900, Joint Sealants

4. Division 8, Doors and Windows

5. Section 09905, Architectural Paint Finishes

1.2 QUALITY ASSURANCE

A. Referenced Standards:

1. American Architectural Manufacturers Association (AAMA):

a. 621, Voluntary Specifications for High Performance Organic Coatings on Coil Coated Architectural Hot Dipped Galvanized (HDG) and Zinc-Aluminum Coated Steel Substrates.

2. American Institute of Steel Construction (AISC):

a. 303, Code of Standard Practice for Steel Buildings and Bridges (referred to herein as AISC Code of Standard Practice).

3. ASTM International (ASTM):

a. A36, Standard Specification for Carbon Structural Steel.

b. A307, Standard Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength.

c. A325, Standard Specification for Structural Bolts, Steel, Heat Treated,

120/105 ksi Minimum Tensile Strength.

d. A490, Standard Specification for Structural Bolts, Alloy Steel, Heat Treated,

150 ksi Minimum Tensile Strength.

e. A792, Standard Specification for Steel Sheet, 55 percent Aluminum-Zinc

Alloy-Coated by the Hot-Dip Process.

f. C991, Standard Specification for Flexible Fibrous Glass Insulation for Metal

Buildings.

g. E84, Standard Test Method for Surface Burning Characteristics of Building

Materials.

4. American Welding Society (AWS):

a. D1.1, Structural Welding Code - Steel.

5. FM Global (FM).

6. Metal Building Manufacturer's Association (MBMA):

a. Low Rise Building Systems Manual.

7. Research Council on Structural Connections (RCSC):

a. Specification for Structural Joints Using ASTM A325 or A490 Bolts, referred to herein as Specification for Structural Joints.

8. The Society for Protective Coatings/NACE International (SSPC/NACE). a. SP 6/NACE No. 3, Commercial Blast Cleaning.

9. Underwriters Laboratories, Inc. (UL):

a. Building Materials Directory.

10. Building Code:

a. As listed in Sections 01332, Seismic Design Data, and 01334, Wind Design

Data.

B. Qualifications:

1. Manufacturer's qualifications:

a. Manufacturer shall be member in good standing of the MBMA.

b. Manufacturer shall be an AISC Quality Certified Fabricator in the category of

Metal Building Systems (MB).

2. Erector qualification:

a. Erector (installer) shall be approved in writing by metal building manufacturer.

b. Erector shall have minimum of 10 years current experience in erection of similar structures.

3. Manufacturer's Structural Engineer: Registered in the State of California.

1.3 DEFINITIONS

A. Code: The word "code" refers to the Building Code.

B. Installer, Erector or Applicator:

1. Installer, erector or applicator is the person actually installing, erecting or applying the product in the field at the Project site.

2. Installer, erector and applicator are synonymous.

1.4 SYSTEM DESCRIPTION

A. Building shall be non-insulated, rigid frame beam and column single slope lean to type with vertical walls and single slope type roof.

1.5 SUBMITTALS

A. Shop Drawings:

1. Product technical data including:

a. Acknowledgement that products submitted meet requirements of standards referenced.

b. Manufacturer's technical reference manual containing all of the manufacturer's standard construction details and specifications.

1) Manufacturer's erection manual containing all details and methods for installation of building frame, roof system, wall system, and accessories.

2) Edit to mark out items not used for this installation.

c. Structural calculations stamped and signed by a Professional Structural

Engineer licensed in the State of California.

1) Include list of design loads and loads transmitted to foundation through columns or walls and location where loads occur.

2) Submit calculations for information only.

2. Fabrication Drawings:

a. Erection Drawings Minimum Scale: 1/8 inch = 1 foot-0 inch.

b. Details and Sections Minimum Scale: 1-1/2 inch = 1 foot-0 inch.

c. List of all design loads and combination of loads.

d. Size and location of each component of the building.

1) Include clearance under structural framing members.

2) Include cross-section of components.

e. Fasteners and details of fasteners connecting each component of the building.

f. Size, location and details of anchor bolts, base plates, and all other components fastened to the foundation.

g. Details of wall panels, roof panels, finishes, flashings, closures, closure strips, trim, calking, and all other miscellaneous components.

B. Samples:

1. Metal color and finish samples of roof and wall panels, roof trim, wall trim, and interior liner panel colors for ENGINEER's selection.

2. Color chart is not acceptable.

C. Operation and Maintenance Manuals:

1. See Specification section 01783, Vendor Equipment Manual, for requirements for:

a. The mechanics and administration of the submittal process. b. The content of Operation and Maintenance Manuals.

D. Miscellaneous Submittals:

1. Manufacturer's and Erector's Qualifications.

2. Manufacturer's acceptance of erector.

PART 2 - PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable:

1. Metal building systems:

a. Butler Building Systems. b. NCI Building Systems.

c. Nucor Building Systems d. American Buildings Co. e. Chief Industries, Inc.

f. Star Building Systems. g. Or Equal.

2.2 MATERIALS

A. Structural Members: Primer painted steel. B. Anchor Bolts:

1. ASTM A307, ASTM A36, Or Equal, galvanized steel.

2. Embedment details to be developed by ENGINEER upon receipt of anchor bolt and loading information for approved shop drawings from building manufacturer.

C. Fasteners:

1. Building Frame, Girts, and Purlins: Galvanized ASTM A325 or ASTM A307 bolts.

2. Roof and Wall Panels: Stainless steel.

3. Miscellaneous Fasteners: Corrosion resistant.

D. Any structural member to be hot-dipped galvanized shall be minimum 12 gauge thickness.

E. Roof and Wall Panels: Steel. F. Grout: See Division 3.

G. Closures: Neoprene.

H. Calking and Sealants: See Specification section 07900, Joint Sealants.

I. Trim: Same material as wall or roof panel.

2.3 ACCESSORIES A. Windows:

1. General:

a. Sizes and types as indicated on the Drawings.

b. Complete unit with all required hardware, framing, fasteners, glazing, weatherstripping, and accessories.

1) Refer to Specification section 08800, Glass and Glazing, for glass requirements.

2. Fixed and/or projected windows:

a. Extruded aluminum sash ASTM B221, 6063. b. Minimum 0.062 inch thickness.

c. Hardware: Aluminum.

d. Finish: Manufacturer's standard lacquer finish.

e. Glazing:

1) Clear.

2) Factory glazed.

3) Single, 1/8 inch minimum, double strength. B. Framed Openings:

1. Walls:

a. Provide all necessary subframing to support wall openings for doors, windows, louvers, pipe or duct penetrations, etc.

1) Material gauge to be determined by metal building manufacturer for size of opening.

b. Size and location of opening as shown on the Drawings. c. Jamb, lintel and girts:

1) Steel:

a) Factory applied prime coat.

2) Metal building manufacturer responsible for providing correct size opening for penetration scheduled, shown or specified.

d. Provide trim to cover all exposed areas of opening frames.

2. Roofs:

a. Provide all necessary roof subframing to support roof mounted equipment and to frame roof penetrations.

1) Material gauge to be determined by metal building manufacturer for size of equipment or opening.

b. Location of roof mounted equipment and/or roof or wall opening as shown on the Drawings.

c. Purlins, angles, clips:

1) Steel:

a) Factory applied prime coat.

2) Metal building manufacturer responsible for providing correct size of opening for penetration scheduled, shown or specified.

C. Roof Curbs for Mechanical Penetrations:

1. Minimum 18 gauge steel galvanized per ASTM A653.

2. Integral cricket.

3. Minimum 8 inches high.

4. Fabricated to conform to roof pitch and profile specified.

5. ThyCurb Model TC-3, M.B.D.N Or Equal from FastCurbs.

2.4 BUILDING DESIGN CRITERIA A. Critical Dimensions:

1. Roof Slope: 1/4 inch per foot.

2. Provide minimum clear inside dimensions, as noted on the Drawings.

B. Building Foundation:

1. All footings, foundations, anchor bolts and piers have been designed based on assumed loadings and reactions.

a. Member sizes and geometry may vary depending on the building being supplied.

b. Do not construct these members until ENGINEER has verified design with approved shop drawings of metal building being supplied.

C. Roof framing members:

1. Per Building Code unless otherwise indicated in this Specification.

D. Wind Loads:

1. Design structure for wind loading as set forth in the Building Code. a. Project site conditions are as follows:

1) Basic Wind Speed: 85 mph.

2) Occupancy Category: III

3) Site Exposure: Class C.

4) Importance Factor: 1.15.

5) Topographic Factor: K=4.0.

E. Seismic (Earthquake) Loads:

1. Design structure for seismic forces as set forth in the Building Code. a. Project site conditions are as follows:

1) Site Class D

2) Occupancy III

3) Importance Factor: 1.2

4) Seismic Design Category D.

5) See structural drawing S0-0002 for site specific seismic factors. Fa, FV, Sms, Sm1, Sds, Sd1, etc.

2.5 FABRICATION A. General:

1. Fabricate building structure, roof and wall panels, accessories and trim in accordance with requirements of AISC and MBMA.

2. Provide all necessary clips, flashing angles, caps, channels, closures, bases and any other miscellaneous trim required for complete water and airtight installation.

a. Provide an inside closure at the base of all corrugated panels and an outside closure at the top of all corrugated panels in addition to all other closure strips required.

1) Form closure strips to fit the corrugation of the metal panels and securely support in place.

2) Closure strips shall fit between corrugated panels and trim or flashing as required to completely separate the interior of the building from the exterior.

b. Provide flashing at all intersections of wall panels and roof panels, and above all openings in wall and roof panels, in addition to all other flashing required.

1) Form flashing:

2) To completely contain water on the outside of the building. a) To be watertight and securely fastened in place.

c. Provide calking at all edges where metal panel trim or flashing is adjacent to the foundation of the building in addition to all other calking required.

1) Securely adhere caulk material to the foundation and the metal panels trim or flashing.

3. At door and window openings, provide additional framing and fasteners as required to structurally replace the wall panel and/or framing displaced.

4. Fabricate and prepare material for shipment knocked down.

5. Factory punch frame to receive all fasteners.

6. Finishes:

a. Clean ferrous surfaces of oil, grease, loose rust, loose mill scale, and other foreign substances.

1) Clean all primary and secondary structural steel members, not noted as being galvanized, in accordance with SSPC SP 6/NACE No. 3.

b. All structural components shall have primer paint coats applied in the shop and finish coats applied in the shop.

1) Shop paint, prime and finish coats, all surfaces which will be inaccessible after erection.

2) Paint in accordance with Specification section 09905, Architectural Paint

Finishes.

3) Paint surfaces of all components not exposed to view.

4) Manufacturer's standard shop applied primer is not acceptable as substitute for primer specified.

c. Wall and roof panels:

1) Exterior surface:

a) Thermosetting fluoropolymer resin enamel. (1) Minimum 70 percent "KYNAR" resin.

b) Meet requirements of AAMA 621. c) FM Class 1 rated.

d) Exposed screw heads shall match color of panel.

2) Interior surface:

a) Manufacturer's standard shop applied polyester coating. B. Roof Panels:

1. 24 gauge minimum, galvalume per ASTM A792.

2. Standing seam interlocking rib configuration.

3. Factory applied color coating.

4. Meet requirements of AAMA 621.

5. Length: Sufficient to cover entire length of any unbroken roof slope up to 40 feet. C. Wall Panels:

1. 26 gauge minimum, galvalume per ASTM A792.

2. Factory applied color coating.

3. Meet requirements of AAMA 621.

4. Length sufficient to cover entire height of any unbroken wall up to 40 feet.

5. Exposed fasteners.

2.6 SOURCE QUALITY CONTROL A. Testing:

1. Employ and pay for the services of a qualified independent testing agency to inspect and test all structural steel work for compliance with Contract Documents.

2. Independent testing agency shall have a minimum of five (5) years performing similar work and shall be subject to ENGINEER’s acceptance.

B. Responsibilities of Testing Agency:

1. Inspect field welding in accordance with AWS D1.1, Section 6, including the following non-destructive testing:

a. Visually inspect all welds.

b. Test 50 percent of full penetration welds and 10 percent of fillet welds with liquid dye penetrant.

c. Test 20 percent of full penetration welds with ultrasonic or radiographic testing.

2. Inspect high-strength bolting in accordance with the RCSC Specification for

Structural Joints, Section 9.

a. Inspect while work is in progress.

3. Inspect structural steel which has been erected.

4. Prepare and submit test reports to ENGINEER.

a. Assist ENGINEER to determine corrective measures necessary for defective work.

2.7 MAINTENANCE MATERIALS

A. Provide 4 ounces of touch up paint for each color provided on the building.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install products in accordance with manufacturer's instructions.

1. Install tolerances in accordance with AISC Code of Standard Practice. a. Install products straight without bowing, sagging, or warping.

2. Install all fasteners.

3. Install base plates on grout bed.

a. Grout bed to be 1 inch thick unless noted otherwise on the Drawings.

B. Fasten roof panels to purlins or secondary support members in accordance with manufacturer's recommendations.

C. Install liner panels in accordance with manufacturer's recommendations.

1. Completely seal air tight around all building structural members and bracing when these members penetrate the liner panel.

D. Install wall panels to supporting structure with exposed fasteners.

E. Install window frames, trim and other miscellaneous items in accordance with manufacturer's instructions and details.

3.2 ADJUSTING AND CLEANING

A. Touch up paint any scratched factory finished surfaces or remove and replace as directed by ENGINEER.

B. Remove and replace any damaged wall or roof panels, frames, etc., as directed by

ENGINEER.