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	SECTION 05400
	COLD FORMED STEEL FRAMING
	** NOTE TO SPECIFIER ** This section is based on the products of NUCONSTEEL ®, a Nucor Company, which is located at: 525 South Locust Street Denton, TX 76201 Tel: (940) 891-3050 Fax: (940) 891-3090 email: info@nuconsteel.com [ Additional Product Data ] NUPANEL and NUTRUSS are a complete, flexible, and compatible light gauge steel load bearing system for residential and commercial construction. NUCONSTEEL offers a fully engineered, integrated framing system from plans through fabrication straight to job site installation. NUPANEL brings a new and innovative approach to wall panelization. NUTRUSS combined with TRUSWAL brings you superior strength, design flexibility and wider spans. NUCONSTEEL reduces the traditional three-step fabrication process down to one fully enhanced software solution from initial drawings to finished product, providing you superior strength, dimensional stability and quick installation of a complete, flexible, and compatible light gauge steel load bearing system.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete any paragraphs below not applicable to project.
		A.	Load bearing cold formed steel stud exterior wall framing.
		B.	Load bearing cold formed steel stud interior wall framing.
		C.	Pre-engineered cold formed steel trusses.
		D.	Cold-formed steel roof system accessories.
		E.	Load bearing cold formed steel floor framing.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others as required.
		A.	Section 04813 - Masonry Veneer: Veneer masonry supported by wall stud metal framing.
		B.	Section 04852 - Thin Veneer Stone: Veneer stone supported by wall stud metal framing.
		C.	Section 05311 - Steel Floor Deck: Metal floor decking supported by wall stud metal framing.
		D.	Section 05312 - Steel Roof Deck: Metal roof decking supported by wall stud metal framing.
		E.	Section 06112 - Framing and Sheathing.
		F.	Section 07213 - Batt Insulation: Insulation within framing members.
		G.	Section 07260 - Vapor Retarders.
		H.	Section 07270 - Air Barriers.
		I.	Section 06114 - Wood Blocking and Curbing: Rough wood blocking.
		J.	Section 09111 - Non-Load Bearing Metal Framing System.
		K.	Section 09205 - Furring and Lathing.
		L.	Section 09260 - Gypsum Board Assemblies: Light weight, non-load bearing metal stud framing.
		M.	Section _____ - __________: Anchors for support of window frames.
		N.	Section _____ - __________: Anchors for support of door frames.
		O.	Section _____ - __________: Placement of anchors for securing ________.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section; add others as required.
		A.	AISI/COS/NASPEC 2001 - Specification for the Design of Cold-Formed Steel Structural Members.
		B.	AISI - Cold-Formed Steel Design Manual, 1996, with 1999 supplement.
		C.	AISI/COFS/ 2001 - Standard for Cold-Formed Steel Framing - General Provisions,
		D.	AISI/COFS/ 2001 - Standard for Cold-Formed Steel Framing - Truss Design.
		E.	AISI/COFS/ 2001 - Standard for Cold-Formed Steel Framing - Header Design.
		F.	AISI/COS2001 - Standard for Cold-Formed Steel Framing - Prescriptive method for one and two story family dwelling.
		G.	ASTM A 370-02e1 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
		H.	ASTM C 645 - Standard Specification for Nonstructural Steel Framing Members.
		I.	ASTM A 653/A 653M - Sheet Steel, Zinc-Coated (galvanized) or Zinc-Iron Alloy-Coated (Galvanized) by the Hot-Dip Process.
		J.	ASTM A 875/A 875M - Standard Specification for Steel Sheet, Zinc-5% Aluminum Alloy Metallic-Coated by the Hot-Dip Process.
		K.	ASTM C-955 - Standard Specification for Load Bearing (Transverse and Axial) Steel Studs, Runner (Tracks), and Bracing or Bridging for Screw Application of Gypsum Board and Metal Plaster Bases.
		L.	ASTM A 1003/A1003M - Standard Specification for Sheet Steel, Carbon, Metallic and Non-Metallic Coated for Cold- Formed Framing Members.
		M.	ASTM C-1007 - Standard Specification for Installation of Load Bearing (Transverse and Axial) Steel Studs and Related accessories.
		N.	AWS D1.1 - Structural Welding Code - Steel.
		O.	AWS D1.3 - Structural Welding Code - Sheet Steel.
		P.	SAE - J78, Steel Self-Drilling Tapping Screws, Latest Edition.
		Q.	SSPC Paint 20 - Zinc-Rich Primers (Type I - Inorganic and Type II - Organic).
	1.4	SYSTEM DESCRIPTION
	** NOTE TO SPECIFIER ** Delete references from paragraphs below that are not actually required; add others as required. All structural framing components and related accessories shall be as published by NUCONSTEEL. Equivalency shall be determined by published dimensional and structural properties including, but not limited to the following: member depth, flange size, lip size, steel yield and tensile strength, corrosion protection, design steel thickness, effective Ix and Sx, and gross and effective area.
		A.	Size components to withstand design loads as follows:
			1.	Vertical Assembly:
				a.	________ psf (________ kPa) positive
				b.	________ psf (________ kPa) negative.
			2.	Horizontal Assembly:
				a.	________ psf (________ kPa) live loads.
				b.	________ psf (________ kPa) live and dead loads.
	** NOTE TO SPECIFIER ** Delete references below that are not required; add others as required Deflection limits relate type of finish to be installed over metal framing. Stucco and smooth finish plasters usually require deflection limits of 1: 240, 1: 360, or less. Masonry or stone veneer cladding may require deflection limits of 1: 600 or less with wall ties and load distribution to metal stud framing.
		B.	Maximum Allowable Deflection (Horizontal And vertical):
			1.	1: 180 of span.
			2.	1: 240 of span.
			3.	1: 360 of span.
			4.	________ of span.
		C.	Framing System:
			1.	Design, construct and install structural and non-structural cold formed framing in conformance with applicable building code and with AISA Standards for Cold-Formed Steel Framing including: General Provisions, Specifications for Design and Standards for Truss Design and Header Design.
			2.	Design to provide for movement of components without damage, undue stress on fasteners, or other detrimental effects when subject to seasonal or cyclic day/night temperature ranges.
			3.	Design system to accommodate construction tolerances, deflection of building structural members, and clearances of intended openings.
	** NOTE TO SPECIFIER ** Include the following paragraph for seismic conditions. Delete if not required.
			4.	Seismic Loads: Design and size components to withstand seismic loads and sway displacement as calculated in accordance with applicable building code.
	1.5	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Provide manufacturer's standard catalog data for specified products demonstrating compliance with referenced standards.
		C.	Shop Drawings: Show layout, profiles, product components, anchorages, accessories, and finish colors.
			1.	Indicate component details including, framed openings, bearing, anchorage, design loading, welds, type and location of fasteners, and accessories or items required of related Work.
	** NOTE TO SPECIFIER ** Edit the following paragraphs to suit the requirements of the project. Delete references below that are not required; add others as required.
			2.	Indicate layout of all bearing members and supports including:
				a.	Studs
				b.	Floor joists.
				c.	Ceiling joists.
				d.	Roof joists.
				e.	Floor trusses.
				f.	Roof trusses.
				g.	________.
			3.	Describe method for securing studs and other members to tracks and for bolted, welded and clipped framing connections.
			4.	Submit calculations for loadings and stresses of all framing under Professional Engineer's seal who is experienced in design of this Work and licensed at the Project location. Include description of design criteria including.
	** NOTE TO SPECIFIER ** Edit the following paragraphs to suit the requirements of the project. Delete references below to trusses if not required.
				a.	Engineering analysis depicting member stresses and deflection.
				b.	Truss member sizes, gauges and connections at truss joints.
				c.	Truss support reactions.
				d.	Top chord, bottom chord and web bracing requirements.
		D.	Certificates: Product certificates signed by the manufacturer certifying material compliance withapplicable codes, specified performance characteristics and criteria, and physical requirements.
		E.	Installation Instructions: Manufacturer's printed installation instructions. Submit special procedures, perimeter conditions requiring special attention.
	1.6	QUALIFICATIONS
		A.	Manufacturer: Company specializing in manufacturing products specified in this section with minimum three years documented experience.
		B.	Fabricator: Company specializing in fabricating products specified in this section with minimum three years documented experience in the fabrication of work similar to that required for this project.
		C.	Installer Qualifications: Experienced in performing work of this section with a minimum of three years documented experience in the installation of work similar to that required for this project.
	** NOTE TO SPECIFIER ** Retain subparagraph below to suit project requirements; otherwise, delete.
			1.	Certificate: When requested, submit certificate indicating qualification.
	** NOTE TO SPECIFIER ** Delete mock-ups if not required for review of construction, coordination of work of several sections, testing, or observation of operation.
	1.7	MOCKUP
		A.	Mock-Up: Install a mock-up using acceptable products and manufacturer approved installation methods. Coordinate with the installation of Related Work Sections. Locate where directed.
			1.	Maintenance: Maintain mock-up during construction for workmanship comparison.
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs.
				a.	Remove and legally dispose of mock-up when no longer required.
				b.	Incorporate mock-up into final construction upon Architect's approval.
			2.	Obtain Architect's acceptance of completed mock-up.
		B.	Preinstallation Meetings: Conduct meetings to verify project requirements, substrate conditions, manufacturer's installation instructions, and warranty requirements. Comply with Division 1 requirements.
	1.8	DELIVERY, STORAGE, AND HANDLING
		A.	Delivery:
			1.	Deliver in manufacturer's original, unopened, undamaged containers or bundles with identification labels intactshowing name brand, type and grade
			2.	Use proper equipment and methods during unloading and lifting equipment to ensure safety and to prevent damage.
			3.	Handle and store products according to manufacturer's recommendations published in technical materials. Leave products off the ground, wrapped or otherwise protected and under clean and dry storage conditions until required for installation.
		B.	Storage and Protection:
			1.	Store materials protected from exposure to harmful weather conditions.
			2.	Store under cover on building site off the ground on wood sills or platforms in a manner to prevent damage form excessive bending, deformation, rust and other damage.
	** NOTE TO SPECIFIER ** Delete the following paragraph if trusses not used on the project..
			3.	Store trusses blocked with a slight slope to permit draining and prevent ponding of water on the interior of the truss members.
			4.	Tarping during storage must allow for ventilation to minimize condensation.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: NUCONSTEEL®, A NUCOR Company, which is located at: 525 S. Locust ; Denton, TX 76201; Tel: 940-891-3050; Fax: 940-343-7911; Email: request info; Web: www.nuconsteel.com
		B.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
		C.	Provide all steel framing from a single manufacturer.
	2.2	FRAMING MATERIALS
		A.	General Requirements:
			1.	Load bearing (structural) cold-formed steel members shall be manufactured from structural quality steel having minimum yield strength of 33 ksi, having a minimum protective coating equal to G-60 galvanized finish, and conforming to one of the following standards: ASTM A 653, ASTM A875, ASTM C955, or ASTM A1003.
			2.	Non-load bearing (non-structural) cold-formed steel members shall have a minimum protective coating equal to G-40 galvanized finish and shall conform to ASTM C-645.
			3.	Load bearing cold-formed steel member shall have engineering properties calculated in accordance with the AISI "Specification for the Design of Cold-Formed Steel Structural Members" and have minimum properties as published by NUCONSTEEL.
			4.	All structural framing accessories shall be formed from steel having minimum yield strength of 33 ksi with minimum protective coating equal to G-60 galvanized finish.
	** NOTE TO SPECIFIER ** Delete from the following paragraphs wall, roof, floor framing components that are not used on the project.
		B.	Framing Components:
			1.	Wall Framing: load bearing (structural) cold-formed steel wall components. Provide wall framing materials, such as studs, tracks, bracing, clip angles, straps, headers and other related accessories.
			2.	Floor Framing: NUTRUSS load bearing (structural) cold formed floor components. Provide floor framing materials, including joists or trusses, tracks, web stiffeners, bracing, clip angles, straps, rim tracks, and other related accessories.
			3.	Framing shall be sized and spaced in accordance with the approved shop drawings.Provide sizes, shapes and gauges indicated.
				a.	Design Uncoated-Steel thickness: 27 mil (22 gauge), .0283 inch (0.72 mm).
				b.	Design Uncoated-Steel Thickness: 33 mil (20 gauge), .0346 inch (.88 mm).
				c.	Design Uncoated-Steel Thickness: 43 mil (18 gauge), .0451 inch (1015 mm).
				d.	Design Uncoated-Steel Thickness: 54 mil (16 gauge), .0566 inch (1.44 mm).
				e.	Design Uncoated-Steel Thickness: 68 mil (14 gauge), .0713 mm (1.81 mm).
			4.	Fastening shall be accomplished by screws, power actuated fasteners, welding, clinching, or a combination of those. The type, size, number, and spacing of fasteners shall be as required by the approved connection detail.
				a.	Screwed structural connections shall use a minimum No. 8 self-drilling screws. Size, edge distance, and spacing shall be in conformance with approved connection detail and shall be installed in accordance with the fastener manufacturer recommendations.
				b.	Screws shall penetrate the last ply in the connection, including gussets as applicable and with at least three threads visible beyond the last ply.
				c.	Wire tying of structural framing members is not permitted.
				d.	Structural framing members may be fastened in a shop or in the field.
				e.	Structural framing members having protective coating removed by welding shall have the coating repaired, at the welds, by painting with a zinc rich primer.
	** NOTE TO SPECIFIER ** Delete the following paragraphs if truss framing components materials are not used on the project..
		C.	Roof Trusses: NUTRUSS Pre-Engineered Cold-Formed Steel Truss System.
			1.	Provide truss type, span and height as indicated.Truss framing shall be sized and spaced in accordance with the approved shop drawings.
			2.	Chords and Webs: Cold-formed from ASTM A 653/A 653M galvanized steel sheet, minimum G60 coating ( ASTM. A 1003/1003M); and minimum yield strength of 33ksi.
				a.	Nominal 27 mil (22 gauge) members: Minimum uncoated steel thickness: 0.0269 inch . Maximum design thickness: 0.0283 inch.
				b.	Nominal 33 mil (20 gauge) members: Minimum uncoated steel thickness: 0.0329 inch . Maximum design thickness: 0.0346 inch.
				c.	Nominal 43 mil (18 gauge) members: Minimum uncoated steel thickness: 0.0428 inch . Maximum design thickness: 0.0451 inch.
				d.	Nominal 54 mil (16 gauge) members: Minimum uncoated steel thickness: 0.0538 inch . Maximum design thickness: 0.0566 inch.
			3.	Fasteners: utilize manufacturer's recommended self-drilling, self-tapping screws with corrosion resistant finish. Fasteners shall be of sufficient size and number to ensure the strength of the connection. All connection points shall utilize mechanical fasteners, welded connections are prohibited.
			4.	Shop fabricate using jigging systems to ensure consistent component placement and alignment of components, and to maintain specified tolerances. Field fabrication is strictly prohibited unless approved and performed by manufacturer's shop assemblers and proper jigging systems.
			5.	Fasten connections within truss assembly with manufacturers screws only and as indicated on the approved shop drawings. Welding and other fasteners are prohibited.
			6.	Fabricate straight, level, and true, without racking or twisting, and to following tolerances:
				a.	Trusses up to 30 feet long: Maximum 1/2 inch (12.5 mm) variation from design length.
				b.	Trusses over 30 feet long: Maximum 3/4 inch (19 mm) variation from design length.
				c.	Trusses up to 5 feet high: Maximum 1/4 inch (6 mm) variation from design height.
				d.	Trusses over 5 feet high: Maximum 1/2 inch (12.5 mm) variation from design height.
			7.	Fabricate truss chord and web components with rolled or closed edges to minimize the danger of cutting during handling. Chord and web components without rolled edges are prohibited.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Before beginning installation, verify that substrate conditions previously installed under other sections are acceptable for installation of metal framing in accordance with manufacturer's installation instructions.
			1.	Verify bearing elevations supporting members arecorrect before framing materials are installed.
			2.	Select fasteners of adequate type, number, and quality to perform intended functions.
			3.	Do not proceed with installation until unsatisfactory conditions have been corrected.
			4.	Installation constitutes acceptance of existing conditions and responsibility for satisfactory performance.
	** NOTE TO SPECIFIER ** Delete from the following paragraph if trusses are not used on the project.
		B.	Verify that rough-in utilities and chases that will penetrate plane of trusses are in correct locations and do not interfere with truss, bracing, or bridging placement.
	3.2	INSTALLATION
		A.	General:
			1.	Prepare attachment surfaces so that they are plum, level, and in proper alignment for accepting cold-formed structural framing system.
			2.	Set framing system plumb, square, aligned, without twist at correct elevation.
	** NOTE TO SPECIFIER ** Delete from the following paragraphs references to wall framing components that are not used on the project.
		B.	Wall Framing: Install, bridge, and brace load-bearing (structural) walls in accordance with the approved shop drawings.
			1.	Cold-formed structural framing may be shop or field fabricated into panelized wall assemblies, prior to erection, or stick built in the field.
			2.	Provide temporary bracing to hold walls straight and plumb and in safe condition until permanent bracing has been installed.
			3.	Stud size and spacing shall be in accordance with the approved shop drawings.
			4.	Fasten wall framing members by screws, power actuated fasteners, welding, or a combination of methods in accordance with the approved shop drawings.
			5.	Fabricate, handle, and erect members and assemblies in a manner to prevent damage or distortion of the framing.
			6.	Cut ends of framing members squarely by shearing or sawing. Install plumb, square, true to line and securely fastened.
			7.	Construct corners using minimum three studs. Provide double stud wall openings at door jambs, and window jambs where indicated on shop drawings.
			8.	Erect load bearing studs one piece full length. Splicing of studs or cutting of flange or lips is not permitted.
			9.	Track shall have web contact with a uniform and level bearing surface and securely anchored with fasteners, sized and spaced in accordance with the approved connection details.
			10.	Erect load bearing studs, brace, and reinforce to develop full strength, to achieve design requirements.
			11.	Fully seat axial loaded studs in receiving tracks (maximum 1/8 inch (3.2 mm) gap between stud and track web is acceptable).
			12.	Align load bearing studs with joists or trusses or use a load distribution member to transfer loads to other structural components or foundations.
			13.	Provide slip connections where required allowing for vertical movements of the structure without imposing vertical loads on the wall framing.
			14.	Coordinate placement of insulation in multiple stud spaces after erection.Provide suitable insulation where wall framing assemblies will form voids, that will not be accessible after completion of framing.
			15.	Install intermediate studs above and below openings to align with wall stud spacing.
			16.	Provide structural framing shear walls where indicated or required in accordance with the shop drawings.
			17.	Attach strapping or blocking to studs for attachment of fixtures anchored to walls.
			18.	Install framing between studs for attachment of mechanical and electrical items, and to prevent stud rotation.
	** NOTE TO SPECIFIER ** Delete from the following paragraphs references to floor framing components that are not used on the project.
		C.	Floor Framing:Install, bridge, and brace load-bearing (structural) floors as indicated and in accordance with the approved shop drawings.
			1.	Cold-formed structural framing may be shop or field fabricated into floor assemblies, prior to erection, or stick built in the field.
			2.	Provide temporary bracing to hold supporting walls straight and plumb and in safe condition until permanent bracing has been installed.
			3.	Floor framing components size and spacing shall be in accordance with the approved shop drawings.
			4.	Fasten floor framing members by screws, power actuated fasteners, welding, or a combination of methods in accordance with the approved shop drawings.
			5.	Fabricate, handle, and erect members and assemblies in a manner to prevent damage or distortion of the framing.
			6.	Cut ends of framing members squarely by shearing or sawing. Install plumb, square, true to line and securely fastened.
			7.	Structural joists shall be supported by foundation walls, joist hangers, load distribution members, or line up over vertical supports as indicated on the drawings.
			8.	Structural framing joists shall have minimum 1-1/2 inch (38 mm) bearing support and a minimum 10 inches (254 mm) of unpunched web from any bearing support.
			9.	Provide joist web stiffeners as required.
			10.	Provide additional support under bearing walls that run parallel to the joists and the wall length exceeds one-half the length of the joist span.
			11.	Provide end blocking where joist ends are not restrained against rotation.
			12.	Floor diaphragms and connections shall be in accordance with the approved shop drawings.
			13.	Align joists with load bearing studs or use a load distribution member to transfer loads to other structural components or foundations
			14.	Coordinate placement of insulation in multiple framing spaces after erection.
			15.	Install framing between joists for attachment of mechanical and electrical items, and to prevent joist rotation.
	** NOTE TO SPECIFIER ** Delete from the following paragraphs references to truss framing components that are not used on the project.
		D.	Truss Erection:Install trusses as indicated and in accordance with the approved shop drawings.
			1.	Cold-formed structural trusses shall be shop fabricated prior to erection.
			2.	Make provisions for erection loads. Install temporary bracing to maintain alignment, until permanent bracing and attachments are installed.
			3.	Truss framing size and spacing shall be in accordance with the approved shop drawings.
			4.	Fasten trusses by screws, power actuated fasteners, welding, or a combination of methods in accordance with the approved shop drawings.
			5.	Fabricate, handle, and erect in a manner to prevent damage or distortion of the framing.
			6.	Do not alter, cut or remove any truss members or components without advance approval in writing from the Architect.
			7.	Support trusses by load bearing metal stud walls, foundation walls, truss hangers, load distribution members, or line up over vertical supports as indicated on the drawings.
			8.	Trusses shall have minimum 1-1/2 inch bearing support.
			9.	Provide additional support under bearing walls that run parallel to the truss and the wall length exceeds one-half the length of the joist span.
			10.	Provide end blocking where truss ends are not restrained against rotation.
			11.	Floor or roof diaphragms and connections shall be in accordance with the approved shop drawings.
			12.	Align trusses with load bearing studs or use a load distribution member to transfer loads to other structural components or foundations
			13.	Coordinate placement of insulation in multiple framing spaces after erection.
			14.	Install framing between trusses for attachment of mechanical and electrical items, and to prevent truss rotation.
			15.	Repair or replace damaged chords, webs, or complete trusses only as directed in writing by the Manufacturer.
			16.	Do not overload trusses during construction.
	3.3	ERECTION TOLERANCES
		A.	Members shall be level, and true to line of 1/8 inch (3 mm) in 10 feet (254 mm) (1:960).
		B.	Spacing: Spaceindividualmembers no more than plus or minus 1/8 inch (3mm) from location indicated. Cumulative error shall not exceed minimum fastening requirements of sheathing or other finishing materials.
		C.	Wall Squareness: Fabricate walls to a maximum out-of-square tolerance of 1/8 inch (3mm).
		D.	Floor Squareness: Fabricate each cold-formed steel floor to a maximum out-of-square tolerance of 1/8 inch (3mm).
	3.4	ADJUSTING AND CLEANING
		A.	Touch up welds with zinc rich primer.
		B.	Repair or replace damaged installed products in accordance with manufacturer's instructions before owner's acceptance.
		C.	Remove from project site and legally dispose of construction debris associated with this work.
	3.5	PROTECTION
		A.	Protect installed products and finished surfaces from damage during construction.
		B.	Do not overload framing during construction.
	END OF SECTION