SECTION 13121

PRE-ENGINEERED BUILDINGS

PART 1 GENERAL

SECTION INCLUDES

[Designed,] pre-engineered and shop fabricated structural steel building frame.

[Insulated] metal wall and sloped roof system including [soffits] [, gutters and downspouts],] [and][.] [______.]

Exterior doors [, windows] [, skylights] [, overhead doors] [, louvers][,] [and][.] [________.]

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [______-____________]: Placement of [anchor bolts.] [base plates.] [________.]

RELATED SECTIONS

Section [______-____________]: Drainage piping from downspouts to [municipal sewers.] [________________.]

Section [______-____________]: Concrete [footings] [grade beams] [and][.] [floor slab.]

Section [______-____________]: Subgrade insulation at foundation perimeter.

[Section 07631 - Gutters and Downspouts.]

Section [______-____________]:	Metal doors and frames.

Section [______-____________]: [Overhead] [________] doors.

Section [______-____________]:	[________] windows.

Section 09900 - Painting: Finish painting [of exterior primed steel surfaces] [inside surface of liner sheet] [and][.] [________.]

Section [______-____________]: Mechanical rough-in utilities.

Section [______-____________]: Electrical rough-in utilities.

REFERENCES

AISC - Specification for the Design, Fabrication and Erection of Structural Steel for Buildings.

ASTM A36 - Structural Steel.

ASTM A153 - Zinc Coating (Hot Dip) on Iron and Steel Hardware.

ASTM A307 - Carbon Steel Externally Threaded Standard Fasteners.

ASTM A325 - High Strength Bolts for Structural Steel Joints.

ASTM A386 - Zinc-coating (Hot-Dip) on Assembled Steel Products.

ASTM A446 - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Structural (Physical) Quality.

ASTM A490 - Quenched and Tempered Alloy Steel Bolts for Structural Steel Joints.

ASTM A500 - Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes.

ASTM A501 - Hot Formed Welded and Seamless Carbon Steel Structural Tubing.

ASTM A525 - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, General Requirements.

ASTM A529 - Structural Steel with 42,000 psi (290 MPa) Minimum Yield Point.

ASTM A572 - High Strength Low Alloy Columbium-Vanadium Steel of Structural Quality.

ASTM C665 - Mineral Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing.

AWS A2.0 - Standard Welding Symbols.

AWS D1.1 - Structural Welding Code.

FS HH-I-521 - Insulation Blankets, Thermal, Mineral Fiber.

FS HH-I-558 - Insulation, Blocks, Boards, Blankets, Felts, Sleeving (Pipe and Tube Covering), and Pipe Fitting Covering, Thermal (Mineral Fiber, Industrial Type).

SSPC - Steel Structures Painting Council.

SYSTEM DESCRIPTION

[Clear span rigid frame.] [Modular rigid frame supported with intermediate columns.] [Truss systems.]

Bay spacing of [____] ft ([____] m).

Primary Framing:	Rigid frame of rafter beams and columns, [canopy beams] [intermediate columns] [braced end frames] [end wall columns] [________], and wind bracing.

Secondary Framing: [Purlins], [girts], [eave struts], [flange bracing], [sill supports], [________], clips, and other items detailed.

Wall and Roof System: Preformed metal panels of [horizontal] [vertical] [________] profile, [with sub-girt framing/anchorage assembly] [insulation] [liner sheets], and accessory components.

Roof Slope: [1/8] [1] [2] [4] [____] inches in 12 inches ([1] 8.33] [16.67] [33.3] [____] mm in 100 mm).

DESIGN REQUIREMENTS

Thermal resistance of Wall System: R value of [____] (RSI value of [____]).

Thermal Resistance of Roof System: R value of [____] (RSI value of [____]).

Members to withstand dead load, [applicable snow load], and design loads due to pressure and suction of wind calculated in accordance with [[applicable] [________] code.] [design load schedule.]

****** [OR] ******

Members to withstand [____] psf ([____] KPa) dead load, [[____] psf ([____] KPa) [nominal] [progressive] snow [and live] load], and [____] psf ([____] KPa) design loads due to pressure and suction of wind.

Exterior wall and roof system to withstand imposed loads with maximum allowable deflection of span: [1/90.] [1/180.] [____.]

Provide drainage to exterior for water entering or condensation occurring within wall or roof system.

Assembly to permit movement of components without buckling, failure of joint seals, undue stress on fasteners or other detrimental effects, when subject to temperature range of [____] degrees F ([____] degrees C).

Size and fabricate wall and roof systems free of distortion or defects detrimental to appearance or performance.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate assembly dimensions, locations of structural members [, connections] [, attachments] [,

openings] [, cambers] [, loads][,] [and][.] [________.]

Indicate wall and roof system dimensions, panel layout, general construction details, anchorages and method of anchorage, method or installation [and][.] [________.]

Indicate framing anchor bolt settings, sizes, and locations from datum[,][.] [and foundation loads.]

Indicate welded connections with AWS A2.0 welding symbols. Indicate net weld lengths.

Product Data: Provide data on profiles, component dimensions, [fasteners,] [and][.] [________.]

Manufacturer's Installation Instructions: Indicate preparation requirements, assembly sequence, [and] [________________.]

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700.] [________.]

Accurately record actual locations of concealed utilities [and][.] [________________.]

QUALITY ASSURANCE

Fabricate structural steel members in accordance with AISC - Specification for the Design, Fabrication and Erection of Structural Steel for Buildings.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum [three] [_______] years [documented] experience.

Design structural components under direct supervision of a Professional Structural Engineer experienced in design of this work and licensed [at the place where the Project is located.] [in the State of [____________.]]

Design Work under direct supervision of a Professional Structural Engineer experienced in design of this work and licensed [at the place where the Project is located.] [in the State of [____________.]]

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for submission of [design calculations] [reviewed shop drawings] [and] [________________] as required for acquiring permit.

Cooperate with regulatory agency or authority and provide data as requested.

PRE-INSTALLATION CONFERENCE

Convene [one] [_____] week prior to commencing work of this Section, under provisions of Section [01039.] [________.]

FIELD MEASUREMENTS

Verify that field measurements are as [indicated [on shop drawings].] [instructed by the manufacturer.]

WARRANTY

Provide [five] [____] year warranty under provisions of Section [01700.] [________.]

Warranty: Include coverage for exterior pre-finished surfaces to cover pre-finished color coat against chipping, cracking or crazing, blistering, peeling, chalking, or fading.

Warranty: Include coverage for weather tightness of building enclosure elements after installation.

PART 2 PRODUCTS

MANUFACTURERS - BUILDING SYSTEM

[__________________________________] System [_________.]

Other acceptable manufacturers offering equivalent systems:

[______________________________] System [_________.]

[______________________________] System [_________.]

[______________________________] System [_________.]

Substitutions: Under provisions of Section [01600.] [________.]

MATERIALS - FRAMING

Structural Steel Members: ASTM [A36.] [A529.] [A572, Grade 50.] [____.]

Structural Tubing:	ASTM [A500, Grade [B] [____].] [A501.]

Plate or Bar Stock: ASTM [A529.] [____.]

Anchor Bolts: ASTM A307, [unprimed.] [galvanized to ASTM A386, Class B.]

Bolts, Nuts, and Washers: ASTM [A325] [A490] [A307][,][.] [galvanized to ASTM A153.]

Welding Materials: AWS D1.1; type required for materials being welded.

Primer: [SSPC 15, Type 1, Red Oxide.] [________________.]

Grout: Non-shrink type, premixed compound consisting of non-metallic aggregate, cement, water reducing and plasticizing agents, capable of developing minimum compressive strength of [2400] [____] psi ([17] [____] MPa) in two days and [7000] [____] psi ([48] [____] MPa) in 28 days.

MATERIALS - WALL AND ROOF SYSTEM

Sheet Steel Stock: ASTM A446 Grade [A] [____], galvanized to ASTM A525 [G90] [____] designation.

Insulation: [FS HH-I-521] [FS HH-I-558] [ASTM C665], [semi-rigid] [batt] [roll] glass fiber type, [unfaced] [faced with reinforced [foil] [white vinyl]] [UL flame spread classification of 25 or less where exposed], friction fit, [____] inches ([____] mm) thick.

Joint Seal Gaskets: [Manufacturer's standard] [________] type.

Fasteners: Manufacturer's standard type, galvanized to ASTM A386 [1.25] [2.0] oz/sq ft ([310] [610] g/sq m), finish to match adjacent surfaces when exterior exposed.

Bituminous Paint: [Asphaltic] [________] type.

Sealant:	[Manufacturer's standard] [________] type, [as specified in Section 07900], non-staining, elastomeric, skinning.

[Metal Mesh: Galvanized steel wire, woven.]

METAL DOORS AND FRAMES

Manufacturers:

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

****** [OR] ******

Doors:	Specified in Section [08112.] [________.]

Frames: Specified in Section [08111.] [________.]

****** [OR] ******

Doors and Frames: Manufacturer's standard.

OVERHEAD DOORS

Manufacturers:

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

****** [OR] ******

Overhead Doors: Specified in Section [08360.] [________.]

Overhead Door Frame:	Formed steel sections braced to building frame[.] [specified in Section 05500.]

****** [OR] ******

Doors and Frames: Manufacturer's standard.

WINDOWS

Manufacturers:

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

****** [OR] ******

Windows: Specified in Section [08512.] [08520.] [________.]

****** [OR] ******

Windows: Manufacturer's standard.

PLASTIC SKYLIGHT

Plastic Skylight: Specified in Section [07810.] [________.]

****** [OR] ******

Plastic Skylight: To manufacturer's standard.

****** [OR] ******

Manufacturers:

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

[_________________________] Model [_____________.]

Single Dome:	[Acrylic] [Polycarbonate] plastic, [____] inch ([____] mm) thick; [clear.] [white translucent.] [________.]

****** [OR] ******

Double Dome:	[Acrylic] [Polycarbonate] plastic, [____] inch ([____] mm) thick; [clear] [white translucent] [________] outer dome, [clear] [white translucent] [________] inner dome; air sealed.

Nominal Size: [[____x____] inches ([____x____] mm) single unit.] [as scheduled.]

Configuration:	[Single] [Multiple] [________] units.

Shape:	[Convex.] [Pyramidal.] [________.]

Unit Frame: Extruded aluminum [thermally broken], integral curb frame [and counterflashing], with integral condensation drainage gutter.

Support Curb: Aluminum sandwich construction; [____] inch ([____] mm) thick, [____] inch ([____] mm) high, fibrous glass insulated, with flange for anchorage to roof deck.

FABRICATION - FRAMING

Fabricate members in accordance with AISC Specification for plate, bar, tube, or rolled structural shapes.

Anchor Bolts: Formed with [bent] [straight] shank, assembled with template for casting into concrete.

Provide framing for [________________] openings.

FABRICATION - WALL AND ROOF SYSTEMS

Siding: Minimum [____] inch ([____] mm) metal thickness, [____] profile [indicated], [____] inch ([____] mm) deep, [lapped] [male/female] edges][.] [fitted with continuous gaskets.]

Roofing:	Minimum [____] inch ([____] mm) metal thickness, [____] profile, [lapped] [male/female] edges[.] [fitted with continuous gaskets.]

Liner: Minimum [____] inch ([____] mm) metal thickness, [flat] [V crimped] [perforated] profile [indicated], [lapped V] [male/female] edges[.] [fitted with continuous gaskets.]

Soffit Panels: Minimum [____] inch ([____] mm) metal thickness, [flat] [V crimped] [____] profile [indicated], [perforated for ventilation.] [unperforated.]

Girts/Purlins: Rolled formed structural shape to receive siding, roofing [and liner] sheet.

Internal and external Corners: Same material thickness and finish as adjacent material, profile [brake formed] [shop cut and factory mitered] to required angles. Back brace mitered internal corners with [____] inch ([____] mm) thick sheet.

Expansion Joints: Same material and finish as adjacent material [where exposed], [____] inch ([____] mm) thick, [manufacturer's standard brake formed] [infill] [________] type, of profile [to suit system.] [formed as detailed.]

Flashings, Closure Pieces, [Facia], [Infills], [Caps], and [________]: Same material and finish as adjacent material, profile [to suit system.] [formed as detailed.]

Fasteners: To maintain load requirements, and weathertight installation, same finish as cladding, non- corrosive [type.] [finish.]

Ventilator: [________________.]

Wall Louvers: [________] type ['Z'] ['Y'] [____] blade design, [same finish as adjacent material] [________], with steel mesh [bird] [insect] screen and frame, [blank sheet metal] [________] at unused portions.

FABRICATION - GUTTERS AND DOWNSPOUTS

Fabricate of same material and finish as roofing metal.

Form gutters and downspouts [and scuppers] of [________] profile and size [indicated] to collect and remove water. Fabricate with connection pieces.

Form sections in maximum possible lengths. Hem exposed edges. [Allow for expansion at joints.]

Fabricate support straps of same material and finish as roofing metal, color as selected.

FINISHES

Framing Members:	Clean, prepare, and [shop prime.] [galvanize to ASTM A386, Class B.] [Do not prime surfaces to be field welded.]

Exterior Surfaces of [Wall] [Roof] Components and Accessories: Precoated enamel on steel of [modified silicone] [________] finish, [________] color[.] [as selected from manufacturer's standard range.]

Interior Surfaces of [Wall] [Roof] Components and Accessories: Precoated enamel on steel of [modified silicone] [________] finish, [________] color[.] [as selected from manufacturer's standard range.]

[Vinyl Vapor Barrier at Interior Face of Insulation: [White] [________].]

PART 3 EXECUTION

EXAMINATION

Verify site conditions under provisions of Section [01039.] [________.]

Verify that foundation, floor slab, mechanical and electrical utilities, and placed anchors are in correct position.

ERECTION - FRAMING

Erect framing in accordance with AISC Specification.

Provide for erection and wind loads.	Provide temporary bracing to maintain structure plumb and in alignment until completion of erection and installation of permanent bracing. [Locate braced bays as indicated.]

Set column base plates with non-shrink grout to full plate bearing.

Do not field cut or alter structural members without approval of Architect/Engineer.

After erection, prime welds, abrasions, and surfaces not [shop primed.] [galvanized.]

ERECTION - WALL AND ROOFING SYSTEMS

Install in accordance with manufacturer's instructions.

Exercise care when cutting prefinished material to ensure cuttings do not remain on finish surface.

Fasten cladding system to structural supports, aligned level and plumb.

Locate end laps over supports. End laps minimum [2] [____] inches ([50] [____] mm). Place sidelaps over bearing.

Provide expansion joints where indicated.

Use [concealed] [exposed] fasteners.

Install insulation [and vinyl vapor barrier] utilizing [________________] for attachment. [Place wire mesh under vinyl for support between framing members.]

Install sealant and gaskets to prevent weather penetration.

System: Free of rattles, noise due to thermal movement and wind whistles.

ERECTION - GUTTER AND DOWNSPOUT

Rigidly support and secure components. Joint lengths with formed seams sealed watertight. Flash and seal gutters to downspouts.

Apply bituminous paint on surfaces in contact with cementitious materials.

Slope gutters minimum [____] inch/ft ([____] mm/m).

Connect downspouts to [storm sewer system.] [________.]

****** [OR] ******

Install splash [pans.] [pads.] [________.]

ERECTION - SKYLIGHT

Install in accordance with manufacturer's instructions.

Coordinate with installation of roofing system and related flashings.

Apply bituminous paint on aluminum surfaces of units in contact with dissimilar metals.

Provide weathertight installation.

INSTALLATION - ACCESSORIES

Install [door frame], [door], [overhead door], [window and glass], [and] [________] in accordance with manufacturer's instructions.

Seal wall and roof accessories watertight [and weather tight] with sealant[.] [in accordance with Section 07900.]

TOLERANCES

Framing Members:	[1/4] [____] inch ([6] [____] mm) from level; [1/8] [____] inch ([3] [____] mm) from plumb.

Siding and Roofing: [1/8] [____] inch ([3] [____] mm) from true position.

END OF SECTION