PRE-ENGINEERED METAL BUILDING SYSTEM

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Alice Harrington
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1 PRE-ENGINEERED METAL BUILDING SYSTEM PART 1 GENERAL 1.1 SUMMARY A. The building shall include all primary and secondary structural framing members, connection bolts, roof and wall covering, flashing, gutter, rake trim, downspouts, closures, sealants and other miscellaneous items as needed. B. The building manufacturer shall provide installation and assembly drawings including anchor bolt setting plan, roof plan, elevation, cross section, etc., as required to assemble all parts, components and accessories furnished by the building manufacturer. Drawings shall indicate the piece marks of all parts to be erected or assembled for easy field identification. 1.2 QUALITY ASSURANCE A. All metal building components, including wall and roof panels shall be warranted by single metal building manufacturer, unless noted or specified otherwise. 1.3 REFERENCES A. SMACNA: Architectural Sheet Metal Manual, Sheet Metal and Air Conditioning Contractors National Association, Inc. LGSI: Light Gauge Structural Institute B. AISC: Steel Construction Manual, American Institute of Steel Construction. C. AISI: Cold Form Steel Design Manual,: American Iron and Steel Institute D. UL580: Testes for Uplift Resistance of Roof Assembles, Underwriters Laboratories Inc. E. FM: Test requirements for Class 1 Panel roofs, Factory Mutual Research Corporation. F. UL2218: Class 4 Impact Resistance Rating G. ICBO: Evaluation Report NO. ER ICBO Evaluation Service Inc. H. ASTM E 1592: Standard Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference, American Society for Testing and Materials. I. ASTM E 1680: Standard Test Method for Rate of Air Leakage through Exterior Metal Roof Panel Systems, American Society for Testing and Materials. J. ASTM E 1646: Standard Test Method for Water Penetration through Exterior Metal Roof Panel Systems, American Society for Testing and Materials. K. ASTM E 1514: Standard Specification for Structural Standing Seam Steel Roof Panel Systems, American Society for Testing and Materials L. ASTM E 408: Standard Test Method for Total Normal Emittance of Surfaces Using Inspection Meter Techniques (Energy Star for Roof Products) M. ASTM E 903: Standard Test Method for Solar Absorbance, Using Integrating Spheres. (Energy Star For Roof Products) N. North American Insulation Manufacturers Association (NAIMA) 1.4 SHOP DRAWINGS AND SUBMITTALS A. 3 sets each provided to the owner. USD 506 B. Product Data: Provide on profiles, component dimensions and accessories. C. Shop Drawings: Indicate assembly dimension, locations of structural members, connection, attachments, openings, cambers, loads, wall and roof system dimensions, panel layout, general construction details, anchorages and method of anchorage, method or installation and anchor bolt layout, framing anchor bolt settings, sizes, and locations from datum and

2 foundation loads, indicate welded connections with AWS A2.0 welding Symbols, indicate net weld lengths, provide professional seal and signature for state in which project is built. D. Samples: Submit actual color samples of pre-coated metal panels for each color selected illustrating color and texture of finish. 1.5 CERTIFICATION A. Pre-engineered metal building fabricator/manufacturer to be AISC Certified B. Submit copy of certificate with shop drawings or upon request by owner. 1.6 GUARANTEE A. Provide 20 year weathertight warranty. Provide Proof of warranty to owner prior to bid B. Painted finish shall be guaranteed for a period of Twenty (20) years, by the panel and metal building manufacturer. A specimen of these warranty documents must be approved by the owner and submitted prior to signing of the contract, clearly stating the conditions under which the guarantee is valid. 1.7 MANUFACTURER INSPECTION A. Final inspection by manufacturer s representative is mandatory prior to substantial completion. Owner to coordinate the date and time of the inspection. B. Written proof of final inspection by manufacturer s representative is to be included in the closeout documents. C. It will be mandatory that the final roof inspection report containing the items to be corrected be sent to owner for his records and remediation. D. Upon acceptance through inspection, a NO DOLLAR LIMIT WARRANTY will be issued and begin a period of Twenty (20 years for the weathertight warranty. PART 2 PRODUCTS 2.1 MANUFACTURERES A. Manufacturers must meet performance requirements as listed in this specification. 2.2 WALL, SOFFIT & ROOF PANELS A. General Panels shall be 26 gauge steel (other types of panel material may be used upon approval of owner. Material for roof panels shall conform to ASTM A-446. Grade E (80,000 psi minimum yield strength.) Material for panels shall conform to ASTM A-525, Designation G-90, 50 KSI minimum yield strength. The roof construction shall carry an Underwriters Laboratories construction (uplift) classification of not less than UL Class 90 (UL90) C. Wall Panel Description a. Precision roll formed for 3-0 wide coverage and shall have four major ribs on 12 centers, 1 1/8 to 1 1/4 high and minor ribs centered between major ribs. b. 26 gauge, nominal 1 ½ thick profile, male/female edges, exposed fastener system c. Fasteners to match panel color D. Roof Panel Description (Screw Down Roof) a. Roof panels shall be designed for a live load of not less than 20psf, 50psf uplift wind pressure and allowable deflection of L/240

3 b. Provide panels in continuous length eave to ridge E. Wall & Liner Panels (FW flush panel by MBCI as guideline) a. Material: 24 gauge white steel conforming to ASTM A446 Grade A b. Exposed Fastener c. Continuous length vertically 2.3 ACCESSORIES A. Eave Gutters and Downspouts B. Sealants a. Eave gutters shall be made from 26 gauge prefinished steel b. Downspouts and rake trim shall be 26 gauge prefinished steel rectangular shaped. Downspouts shall have a 45 degree elbow at the bottom and shall be supported by Attachment to the wall covering at 10 maximum spacing. Unless otherwise specified, downspouts terminate at the base plate elevation c. Rainfall intensity A. As a minimum, all exterior gutters and downspouts shall be designed for rainfall intensity based upon a 5 year recurrence interval for a five minute duration. a. Compliance: Sealant shall meet or exceed requirement of this standard A. ASTM C920, Type S, Grade NS, Class 50, Use NT, T, G, A and I B. Can/CGSB M87 Canadian General Standards Board C. ASTM D624: Tear strength 44.4lbf/in D. ASTM D412: Elongation 300% E. ASTM D412: Tensile strength 210psi b. Sealants for side laps, end laps, accessories, etc., shall be a preformed butyl rubber based compound or Titebond WeatherMaster Metal Roof Sealant. The material shall be non-hardening, non-shrinking and non-corrosive and shall have excellent adhesion to metals, painted surfaces and plastics at temperatures from -30deg F to 160deg F. These sealants shall be in tape mastic form, of shape and size recommended by panel and trim manufacturer for various applications, and shall have paper backing for easy handling. 2.4 SHOP/FACTORY FINISHING A. Pretreatment The metal shall be given a pretreatment prior to finishing, consisting of cleaning and creating a chemical reaction to form and inorganic coating for bonding of the finish. B. Framing Members: Shop primed C. Exterior Prefinished Wall Panels and Accessories, Miscellaneous Trim, Gutters, Downspouts, and Rake Trim: Prefinished 20 year warranty D. Wall Panels: Factory painted 20 year warranty finish

4 E. Roof Panels: Factory painted 20 year warranty finish F. Owner to select color from manufacturers standard selection chart, minimum 8 colors for roof panels, wall panels, accessories trim and all other prefinished metal building items. PART 3 EXECUTION 3.1 COORDINATION WITH DESIGN A. It shall be the responsibility of the pre-engineered metal building manufacturer to coordinate metal building components (i.e. mainframe depths and dimensions, flange brace locations, portal frame dimension, etc.) 3.2 STRUCTURAL STEEL FABRICATION A. General Fabrication a. All structural steel members shall be factory cut, formed, punched, welded, and prime coat painted for bolted field assembly. All base plates cap plates, stiffener plates, and splice plates shall be shop fabricated complete with bolt connection holes. All building parts shall carry an identifying piece mark for easy field identification. b. Flanges and webs of built up welded member shall be joined by a continuous automatic submerged arc-welding process on one side of the web. B. Primary Structural Members a. Steel used in the fabrication of built up primary structural members shall have a minimum yield of 50,000 psi. Hot rolled wide flange members shall conform to ASTM A992 with a yield strength of 50,000psi. All other hot rolled primary structural members shall have a minimum yield of 36,000psi. b. Primary framing shall be shop fabricated and shall include factory welded purlin and girt clips. Holes shall be provided by the factory for attachment of secondary members and bracing. c. North bearing end wall frame shall be a rigid frame designed for no future expansion. All end wall columns may be used in the support of the north end wall beam. d. Interior frames shall be substituted for bearing end wall frames when specified e. No live load reduction will be allowed f. Make provisions for the south wall of the building to be an expandable end wall for future expansion. C. Secondary Structural Members a. Steel used in the fabrication of cold formed structural members shall have a minimum yield of 55,000 psi. Steel with a minimum yield different from the above may be used on individual members as required by design or as specified. b. Purlins and Girts Purlins and girts shall be precision roll formed of 16, 14 or 12 gauge steel with a minimum yield of 55,000 psi. Purlins and girts shall be 8 deep Z Sections 2 ½ or 3 ½ wide flanges with stiffening lips formed at any angle to 50 degrees with the flanges. PEMB manufacturer will design for the collateral, live, wind and seismic loading.

5 c. Eave Struts Eave struts shall be C sections with one flange cold formed to suit the roof slope and vertical wall condition and provide suitable fastening surfaces for both wall and roof sheets. Steel in eave struts shall be 14 gauge minimum yield of 55,000 psi. d. Wind Bracing Buildings shall be designed to resist wind loads by portal columns and diagonal bracing determined and needed by the PEMB manufacturer. Diaphragm action of the wall panels shall not be allowed. Bracing at roofs shall be designed to resist wind loads by diagonal bracing consisting of either cables, rods or angles. e. Flange Bracing The inside flange of all frames shall be adequately braced so that the allowable compressive stress is adequate for the design load combination. f. Base Member A continuous base member shall be provided to which the base of the wall covering may be attached g. Framed Openings- Framing members for all openings shall be adequate for the equipment determined h. No live load reduction will be allowed D. Structural Coating a. All structural steel components shall be factory cleaned to remove all loose dirt, grease, mill scale and other foreign matter and then coated with standard structural rust inhibiting red oxide primer that meets or exceeds Federal Specification TTP 636. E. Splices and Connections a. All structural steel shall be shop punched for bolted field assembly, except for field located accessories. b. All bolts for field assembly of primary structural members shall be high strength bolts, indicated on drawings and finish will be electro zinc with bronze chemical chromate conversion coating. All high strength bolts shall conform to ASTM A- 325, unless otherwise specified. Bots for primary structural members shall not be less than 5/8 diameter. Blots for secondary members shall be ½ electro zinc plated machine bolts conforming to ASTM A-307 unless otherwise specified. 3.3 INSTALLATION OF WALL AND ROOF PANELS 3.4 FRAMED OPENINGS A. Wall panels shall be continuous from base to eave B. Roof panels shall be continuous from eave to ridge. Sealant shall be used in all roof panel end laps and side laps C. Eaves shall also be sealed D. Fastener population and pattern for both wall and roof panels shall be shown on the erection drawings E. Roof, wall and soffit panel systems to be weathertight, free from oil canning, waves, warps, buckles, fastening stresses or any other type of panel distortion.

6 A. Framed openings shall be furnished by PEMB manufacturer to accommodate overhead doors supplied by the owner, and walk through doors. Framed openings shall consist of structural framing to provide a large opening in a wall, along with the necessary trim to flash around this opening and provide a finished appearance. B. Size of opening shall be determined by the size of door specified. Structural framing (jambs and header) shall consist of cold formed, open C sections. Necessary clips and fasteners for making connections for all members shall be provided. Trim around opening shall be metal building manufacturers standard to accommodate wall panel configuration. C. Provide color coated trim to entirely cover shop primed structural jambs and headers

SECTION METAL BUILDING SYSTEMS

SECTION METAL BUILDING SYSTEMS SECTION 13 3419 PART 1 GENERAL 1.01 SECTION INCLUDES A. Manufacturer-engineered, shop-fabricated structural steel building frame. B. Insulated Metal wall and roof panels including gutters and downspouts.