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Building Specifications

 

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1. GENERAL

1.1 SCOPE

1.1.1 These specifications delineate the design criteria, material quality and fabrications processes used in metal building systems designed, manufactured, and furnished by Delta Steel Buildings Company (tm).

1.1.2 Delta utilizes those standards, specifications and/or interpretations and recommendations of professionally recognized groups and agencies, such as MBMA, AISC, AISI, AWS, and ASTM as the basis in establishing its own design, fabrications and quality criteria, standards, practices, methods, and tolerances.

1.2 MATERIALS

Standard material furnished for Delta Metal Building Systems shall include primary and secondary structural framing members, bracing metal panels for roofing and siding, flashings, fasteners, sealants, accessories and all other miscellaneous component parts required for a complete building (except that anchor bolts and other embedded items are excluded).

2. DESIGN

2.1 GENERAL

2.1.1 All structural steel sections and welded plate members shall be designed in accordance with the applicable sections, relating to design requirements and allowable stresses, of the latest edition of the American Institute of Steel Construction (AISC) "Specification for the Design, Fabrication and Erection of Structural Steel for Buildings."

2.1.2 All light-gage, cold formed, structural members and covering shall be designed in accordance with the applicable sections, relating to design requirements and allowable stresses, of the latest edition of the American Iron and Steel Institute (AISI) "Specifications for the Design of Cold Formed Steel Structural Members."

2.2 DESIGN LOADS

2.2.1 Design load requirements shall be determined by local conditions, applicable codes, building end use, etc. Magnitude of design loads shall be specified by the contract documents. Application of design loads shall be in accordance with the Design Practices sections of the Metal Building Manufacturers Association (MBMA) 1986 "Low Rise Building Systems Manual", unless specified otherwise.

2.2.2 Specified design loads shall be considered to act in various combinations so as to produce the most unfavorable effect on the building or structural member concerned. Unless otherwise specified, load combinations shall be those listed in the Design Practices sections of the MBMA 1986 "Low Rise Building Systems Manual."

3. STRUCTURAL FRAMING

 

3.1 PRIMARY MEMBERS

3.1.1 Primary structural framing shall refer to the Primary Frames (transverse rigid frames and Lean-to rafters/columns), expandable and non-expandable End Frames (rafters/corner posts/end posts), Wind/Seismic Bracing and Crane systems.
a. Members fabricated from plate, plate coils, strip mill plate or flat bar stock shall have flanges and webs joined one side of the web by a continuous welding process. All material shall have a minimum yield strength of 50,000 psi. Material will conform to physical specifications of the following ASTM specifications: plate (ASTM A-572, Gr. 50); plate coils and strip mill plate (ASTM A-570, Gr. 50); and flat bar (ASTM A-36, Modified 50).
b. Members fabricated from W shapes (hot-rolled structural sections) will conform to the physical specifications of ASTN A-36 except that steel shall have a minimum yield strength of 42,000 psi.
c. Members fabricated from other hot-rolled structural sections (S shapes/American Standard channels/angles/rods for anchor bolts/all other miscellaneous structural shapes) shall have a minimum yield strength of 36,000 psi and will conform to the physical specifications of ASTM A-36.
d. Interior columns of multi-span frames will be fabricated from round pipe sections which have a minimum yield strength of 50,000 psi.
e. Rods used for bracing will conform to the physical specifications of ASTM A-36 except that steel shall have a minimum yield strength of 50,000 psi.
f. Cables used for bracing shall be zinc coated steel wire (7 strands) extra high strength grade.
g. Members fabricated by cold forming process shall have a minimum yield strength of 55,000 psi and will conform to the physical specifications of ASTM a-570.

3.2 SECONDARY MEMBERS:

3.2.1 Secondary structural framing shall refer to purlins, girts, eave struts, base members, flange bracing, gable angles, clips and other miscellaneous structural parts.

a. Purlins, girts, eave struts, base members and gable angles shall be cold formed from steel which has am minimum yield strength of 55,000 psi and will conform to the physical specifications of ASTM A-570.
1. Purlins are roll formed "Z" sections, 81/2" or 10" deep. Each flange of these "Z"s has a stiffening lip formed at 50° to the flange.
2. Girts are roll formed "Z" or brake formed "C" sections 61/2" or 81/2" deep. Each flange of these members has a stiffening lip formed at 50°to the flange on "Z"s and at 90° on "C's.
3. Eave struts are roll formed "C" sections, 81/2" deep with 31/4" wide top and bottom flanges. Flanges are formed at angles other than 90° to the web to accommodate various roof slopes. Each flange has a stiffening lip formed at 90° to the flange.
b. All other miscellaneous secondary members shall have a minimum yield strength of 36,000 psi.

3.3 CONNECTIONS

3.3.1 All field connections shall be bolted (unless otherwise noted).

3.3.2 All shop connections shall be welded using either submerged or shielded arc process, and welding shall be in accordance with the applicable sections, relating to design requirements and allowable stresses, of the latest editions of the American Welding Society "Structural Welding Code."

3.4 STRUCTURAL PAINTING

All framing members shall be cleaned to remove loose rust and mill scale, and given one shop coat of red color, air drying, alkyd zinc chromate primer. Cleaning process shall meet or exceed Steel Structure Paint Council Specification SSPC-SP2 for Hand Tool Cleaning. Primer shall be formulated to equal or exceed performance, under laboratory conditions, requirements of U.S. Federal Specification TTP-636. The primer coat thickness shall be a minimum of one mil.

4. ROOF AND WALL COVERING

 

4.1 GENERAL

4.1.1 Standard covering for roofs or walls shall be a ribbed type panel having 36 inch net coverage. These panels shall be 26 gage, Galvalume steel, with or without a color coating. At Delta's option, substrate for color coated panels may be galvanized steel sheet in lieu of Galvalume.

4.1.2 Premium covering for roofs shall be a standing seam panel having up to 30 inch net coverage. These panels shall be 24 gage, Galvalume steel with or without a color coating ("White" or "Brown").

4.1.3 Premium covering for walls shall be a concealed fastener panel having up to 18 inch net coverage. These panels shall be 24 gage, Galvalume with a color coating. At Delta's option, substrate for these panels may be galvanized steel sheet in lieu of Galvalume.

4.1.4 All panels, both standard and premium, shall be precision roll-formed to the required configuration.

4.1.5 Roof and wall panels of other materials and thicknesses are available upon request.

4.2 PANEL MATERIALS:

4.2.1 Galvalume is a specialty steel sheet product with a patented coating of corrosion resistant, aluminum-zinc alloy applied by a continuous hot dipping process. Typical coating weight is 0.5 oz. per square foot of coated sheet (both sides) - equivalent to approximately 0.8 mil thickness on each side. Galvalume steel panels shall have a minimum yield strength of 50,000 psi (exception: SUR panels have 37,000 psc yield strength) unless otherwise specified. Galvalume steel will conform to ASTM specification A-792.

4.2.2. Galvanized steel has a corrosion resistant zinc coating applied by a hot dip galvanization process conforming to ASTM Specification A-525 with a coating class of G-90; i.e. 0.90 oz. per square foot of coated sheet (both sides) - equivalent to approximately 0.85 mil thickness on each side. Base metal for galvanized panels shall have a minimum yield strength of 50,000 psi unless otherwise specified, and will conform to the physical specifications of ASTM A-446.

4.2.3 Color coated panels shall have the exterior side finished with a silicone polyester*, coating system applied over the Galvalume or galvanized substrate. Surface shall be chemically cleaned, pre-treated, primed and coated, then oven baked to cure. Total coating system shall have a one mil dry film thickness. The interior side of these panels shall be protected by a wash coat of primer applied at 0.5 mil dry film thickness. Panels shall be coated prior to roll forming.

*Note: When white color is specified, finish shall be a polyester (in lieu of silicone polyester) coating system.

4.3 PANEL CONFIGURATIONS AND FINISHES

For panel configurations and finishes refer to card titled "Panel and Trim Colors"   and "Panel Profiles"

 

4.4 FLASHING, TRIM & CLOSURES

4.4.1 Flashing and/or trim shall be furnished at eaves, rake, corners, base, framed openings and wherever necessary to seal against the weather and provide a finished appearance. Color shall be selected from Delta's standard panel colors except for rake trim. Standard colors for this item are "White" or "Burnished Slate" although other colors are available by special request. Profiles and dimensions of all flashing/trim will be Delta's standards.

4.4.2 Eave gutters and downspouts may be specified as optional. Gutters are box shaped with face profile shaped to match rake trim. Downspouts are rectangular shaped (2 7/8" x 41/4" min. size) and shall have a 45 degree elbow at the bottom. Standard colors for eave gutters are "White" or "Burnished Slate" although other colors are available by special request. Color for downspouts shall be selected from Delta's standard panel colors.

4.4.3 Color coated, Galvalume or galvanized steel for flashing, trim, metal closures, downspouts and other miscellaneous uses shall be 26 gage thickness of the same specification as the roof and wall covering material.

4.4.5 Material used for Base Angle/Trim member shall be color coated, 18 gage, galvanized steel, 36,000 yield strength. Color shall be "Burnished Slate".

4.4.6 Preformed, closed cell, polyethylene closure strips matching the profile of the panel shall be installed along the eave and at other locations to provide weathertightness when shown on Delta's erection drawings.

4.5 FASTENERS

4.5.1 Standard wall fasteners shall be No. 12, self-drilling carbon steel screws with an integral, hex-washer head, and without a sealing washer. Minimum length of fasteners shall be 11/4 inches for panel-to-structural application and 3/4 inches for stitch screws.

Optional wall fasteners shall be No. 14 self-tapping, carbon steel screws with an integral, hex-washer head, and without a sealing washer. Minimum length of fasteners shall be 1 inch for both panel-to-structural and stitch applications. Both standard and optional wall fasteners shall have a corrosion-resistant coating applied for long term protection. Fasteners shall be painted to match panel and/or trim color.

4.5.2 Standard roof fasteners shall be No. 12 self-drilling carbon steel screws with an "extended life" hexagon head that is compatible with Galvalume or color coated panels, A sealing washer shall be provided. Minimum length of fasteners will be 11/4 inches for panel-to-structural applications and 3/4 inches for stitch screws. Optional roof fasteners shall be No. 12 self-tapping, carbon steel screws with an "extended life" hexagon head that is compatible with Galvalume or color coated panels. A sealing washer shall be provided. Minimum length of fasteners shall be 1 inch for both panel-to-structural and stitch applications. "Extended life" heads will be either a zinc/aluminum/manganese alloy casting or a 302 stainless steel cap over the carbon steel head, at Delta's option. when used with color coated material, fasteners shall be painted to match panel and/or trim color.

4.6 SEALANTS 4.6.1 Sealants for sidelaps, endlaps, accessories, etc. shall be a preformed, butyl rubber based compound. 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 -30°F to 160°F. These sealants shall be in tape mastic form, of shape and size recommended be Delta for various applications, and shall have paper backing for easy handling.

4.6.2 Tube sealants shall be used to supplement tape mastic sealants and shall be applied in locations indicated by erection instructions. Tube sealant shall be a synthetic elastomer based material which becomes tack-free in less than 2 hours at 75°F but retains flexibility.

4.7 INSTALLATION OF WALL AND ROOF PANELS

4.7.1 Wall panels shall be continuous from base to eave provided panel length does not exceed 30 feet. If higher eave heights are specified, panels shall be spliced, at Delta's option, by lapping or by a band of flashing. A splice shall occur over a wall girt.

4.7.2 Roof panels shall be continuous from eave to ridge provided panel length does not exceed 42 feet. If this length is exceeded, panels shall be spliced by lapping a minimum of 5 inches. These endlaps shall occur at a roof purlin. Sealant shall be used in all roof panel endlaps.

4.7.3 When specified, all ribbed, roof panel sidelaps shall be sealed with a field applied, continuous ribbon of tape mastic sealant. Eave shall also be sealed when specified.

4.7.4 Fastener population and pattern for both wall and roof panels shall be as shown on erection drawings.

4.8 UNDERWRITERS LABORATORIES UPLIFT RATINGS

By increasing roof fastener population and changing installation pattern, certain Delta roof panels will obtain an Underwriters Laboratories wind up lift classification of Class 30, Class 60 or Class 90. UL uplift ratings may be specified on the following roof panels:

"A" with up to 4" blanket type insulation:

UL30

UL60

UL90

"R" with up to 6" blanket type insulation:

UL30

UL60

UL90

"U" with up to 3" blanket type insulation:

UL30

UL60

UL90

"WSII" with up to 6" blanket type insulation:

UL30

UL60

UL90

 

5. ACCESSORIES

 

5.1 PERSONNEL DOORS

5.1.1 Personnel (walk) door leaves shall be Ceco, full flush hollow metal doors, 1 3/4 inches thick with 20 gage, G-60 galvanized skins over a kraft honey-comb core. Leaf shall be reversible to work with non-handed door frames.

5.1.2 Personnel (walk) door frames shall be Ceco Non-handed (reversible) frames, 5 3/4 inches deep with a 2 inch wide face, and a 1/2" single backbend each side, 16 gage, G-60 galvanized steel with square cut, butted corners. Jambs and header are of knock-down type for field assembly through bolted connections. Door frame shall generally be self-flashing.

5.1.3 Personnel door size shall be either 3070 (single) or 6070 (double). In addition to size, doors shall be designated as M (solid leaf), G (half glass; 23" x 29" nominal size), or LV (long vision glass; 6" x 54" nominal size). Doors shall be factory glazed with clear glass.

5.1.4 Standard hardware for all doors shall consist of 11/2 pairs of butts for each leaf (all hinges are in a finish compatible to door finish and one hinge on each leaf will have a non-removable pin), a lockset in US26D finish, and an aluminum threshold (3 3/8 inches wide) with vinyl door sweep. An astragal will be furnished for active leaf of double doors as will head and foot bolts for inactive leaf.

Optional hardware that may be specified is:
(a) Handicap (lever) handles, in lieu of knobs, on lockset
(b) Panic exit/entrance hardware (slim-line touch bar type)
(c) Surface mounted door closers
(d) Vinyl weatherstripping kit

5.1.5 Doors may be specified in either "Standard" or "Premium" quality. Differences are as follows:

 

Standard

Premium

·Sizes

·3070 & 4070

·3070 (single)

 

(single)

6060(double)

·Leaf styles

·M, G (except 4070)

·M, G, & LV

 

& LV

 

·Core: (typical)

·Kraft honey-comb

·Kraft honey-comb

(optional)

Urethane foam

Not available

·Glazing

 

 

w/kraft cores

·Single pane,

·Single pane,

 

tempered glass

tempered glass

 

(clear)

(clear)

w/foam cores

·Double pane,

Not available

 

tempered glass

 

 

(clear)

 

·Factory Paint

·White, primer coat

·Burnished Slate

(door & frame)

 

finish coat

·Surface texture

·Smooth/smooth

·Leather grain/

(door & frame)

 

smooth

·Lockset: (typical)

·Light duty

·Mortise**

 

cylindrical

 

(optional)

·Medium duty

·None

 

cylindrical* or mortise**

 

·Weatherstripping kit

·Optional extra

·Included

*Medium duty cylindrical locksets are designed to conform to ANSI A156.2, Series 4000, Grade 2 and will meet Federal Specifications FF-H-00106B, Series 160. These locksets are UL listed.
**Mortise locksets are designed to conform to ANSI A156.2, Series 1000, Grade 1 and will meet Federal Specifications FF-H-00106B, Series 86 and 87. These locksets are UL listed.
5.1.6 Sheet metal trim shall be furnished with all doors to flash around door frame and provide a finished appearance.

5.2 HORIZONTAL SLIDING WINDOWS

5.2.1 Aluminum windows shall be single slide (horizontal) type, with preglazed clear glass, removable half screens, latching device,, and weatherstripping. windows are specifically designed for installation in a structural sub-frame, and will have mounting fins.

5.2.2 Single windows shall be 3030, 3040 or 6030 nominal size.

5.2.3 Window shall be glazed with clear glass using vinyl glazing beads and shall be back-bedded. Screens for windows shall be fiberglass mesh (dark bronze color) in an aluminum frame (finished to match window finish).

5.2.4 All structural members shall be extruded aluminum, assembled with screws and sealed at junctions. Window construction shall conform to AAMA (American Aluminum Manufacturers Association) Specification A-1, Class II.

5.2.5 Windows may be specified in either Standard or Premium quality. Differences are as follows:

 

Standard

Premium

·Finish on Aluminum

·Mill

·Burnished Slate

·Glazing

·1/8" D.S.B.

·7/16" double

 

clear glass

pane insulating

 

 

glass (clear)

5.2.6 Structural sub-framing consisting of angle sections shall be furnished with each window. Cold formed channel sub-framing may be specified as optional.

5.2.7 Sheet metal trim shall be furnished with all windows to flash around window frame and provide a finished appearance.

5.3 FIXED GLASS WINDOWS

5.3.1 Aluminum, strip windows shall be self-flashing type with mounting fins and snap-on trim. Frame members shall be extruded aluminum sections 21/2" deep with .062" wall thickness. Unit shall have a Burnished Slate finish and shall be preglazed.

5.3.2 Strip window shall be 2 feet wide by 6 feet high, nominal size, and shall be field mounted in a structural sub-frame consisting of angle sections. Cold formed channel sub-framing may be specified as optional.

5.3.3 Window shall have fixed glass. Glazing will be 7/16" double pane, insulating glass (clear). Aluminum snap-in glazing beads will be used and glass will be back-bedded.

5.3.4 Window unit shall be assembled with screws and sealed at junctions. Construction shall conform to AAMA (American Aluminum Manufacturers Association) Specification A-1, Class II.

6. BUILDING FOUNDATION

6.1 ANCHOR BOLTS

6.1.1 Anchor bolts shall be furnished by others (not Delta) and shall be set in strict accordance with Delta's anchor bolt drawings. Anchor bolts shall be of length and strength to properly resist the governing reactions induced by the design loads and shall be of the diameter shown on Delta's anchor bolt drawings. All anchor bolts shall be unpainted so as to bond with the concrete in which they are set. Anchor bolts can be furnished by Delta if specifically called for by the contract documents.

6.2 FOUNDATIONS The building foundation shall be designed by a qualified engineer to support the metal building and all other loads required by the occupant's usage. Delta's anchor bolt drawings shall show column reactions to be used for designing the building foundation. Delta shall not be responsible for the design or adequacy of the foundation provided.

7. BUILDING ERECTION

7.1.1 The erection of Delta Buildings systems shall be in accordance with applicable erection drawings and other erection information furnished by Delta.

7.1.2 Erection shall be performed by a qualified erector using proper tools and equipment. It shall be the responsibility of the erector to comply with all applicable legal and safety requirements. It shall further be the responsibility of the erector to determine and provide any and all temporary bracing, bridging, blocking. shoring, and/or securing of components, etc. as required for stability during the entire erection process.

7.1.3 Erector shall not make any field modifications to any structural member except as authorized and specified by Delta.

8. WARRANTIES

8.1.1 With every building manufactured Delta shall furnish a three year limited warranty against failure caused by faulty or sub-standard materials.

8.1.2 If Delta Steel Buildings Company (tm) erects the building, Delta's limited warranty shall also include a one (1) year workmanship guarantee against failures caused by faulty erection.

8.2 WALL PAINT WARRANTIES

8.2.1 All Delta color coated wall panels shall be warranted, within limits set by the warranty, for a period of ten (10) years against chalk, fade, crack, check, blister or peel. This 10 year warranty is standard; a twenty (20) year warranty may be specified as an optional extra.

8.2.2 Delta color coated wall panels shall be warranted, within limits set by the warranty, for a period of twenty (20 ) years against chalk, fade, crack, check, blister or peel. This 10 year warranty is standard; a twenty (20) year warranty maybe specified as an optional extra.

8.3 ROOF PAINT WARRANTY 8.3.1 All Delta color coated (white only) roof panels shall be warranted, within limits set by the warranty, for a period of five (5) years against chalk, fade, crack, check, blister or peel. This 5 year warranty is standard.

8.4 ROOF MATERIAL WARRANTY (GALVALUMETM PANELS) 8.4.1 All unpainted GalvalumeTM roof panels shall be warranted, within limits set by the warranty, for a period of twenty (20) years against rupture, perforation and structural failure. This 20 year warranty is standard only if panels are installed using approved fasteners.

8.5 ROOF WEATHERTIGHTNESS WARRANTY (DELTA ROOF SYSTEM) 

8.5.1 A twenty (20) year weathertightness warranty may be purchased as an optional extra for Delta Roof Systems only. Delta and the Delta Builder who erects the building will participate in this warranty. If a 20 year weather-tightness warranty is specified, Delta shall guarantee the Builder's performance to repair or stop any roof leaks caused by wear and tear by the elements, subject to provisions set forth in the warranty.

Call the Delta Force!

1-800-285-8169

 

Delta Steel Buildings Company (tm)

11500 Stemmons Freeway Ste. 100

Dallas, TX 75229

PH: 800-285-8169

Metro: 972-556-0505

Fax: 972-241-8581

 

©2003 Delta Steel Buildings Company (tm).

All Rights Reserved.

Copying is strictly prohibited.