STANDARD BUILDING SPECIFICATIONS
SECTION 1: GENERAL
1.1 SCOPE
These specifications cover the materials and the fabrication of building materials
manufactured by Bunger Steel Inc, which shall be designed and erected in accordance
with these specifications and accompanying drawings supplied with building materials.
Erection by others unless specifically stated otherwise on the sales agreement.
The material furnished shall include the Primary and secondary structural framing,
roof panels, wall panels, bracing, fasteners, closures, flashing, any special
items listed on the sales agreement and all other parts for a complete building
system (except for anchor bolts and any items embedded in concrete or masonry.)
Doors, windows, insulation, etc.... are not considered part of the building system
unless specifically stated otherwise on the sales agreement.
1.2. DESCRIPTION
1.2.1. Rigid Frame, clear span is a continuous transverse frame building with
a roof slope of 1:12 unless stated otherwise.
1.2.2. Straight Column, clear span is a continuous transverse frame building
with a roof slope of 1:12 consisting of tapered beams (rafters) on straight columns.
1.2.3. Multi-Span, Rigid Frame is a continuous transverse frame building with
a roof slope of 1:12 consisting of tapered columns and rafters and one or more
interior pipe or built up columns.
1.2.4. Single Slope, Rigid Frame is continuous transverse frame building with
a roof that slopes in one direction and can be clear span or multi-span.
1.2.5. Lean-to is a building extension with a roof that slopes in one direction,
getting support from the structure to which it attaches. Main structure must be
designed to handle the extra load of the lean-to.
Other roof slopes and designs are available.
1.3 BUILDING NOMENCLATURE
1.3.1 Building width and length is measured from outside to outside of by-pass
or flush mounted girt.
1.3.2 Building eave height is a nominal dimension measured from bottom of the
column base plate to the intersection of the roof and sidewall sheets at the eave
strut.
1.3.3 Main frames shall be spaced at 25' or 20' 0.C. . Mixed bays and other
non-standard bay spacing available by special request to meet special construction
or design conditions.
1.3.4 Roof pitch shall be 1" rise to 12" horizontal run as standard.
Per special request, buildings will be designed for any reasonable roof pitch.
1.4 DRAWINGS AND CERTIFICATION
Bunger shall furnish approval erection drawings which include anchor bolt plans,
wall and roof elevations for framing and sheeting, frame cross sections and general
details to clearly show the proper location of all building components. Final
erection drawings and shipping list will be delivered with the building. Bunger
shall also furnish structural design data, signed by a registered, professional
engineer, that the building design meets the requirements of the specified building
code and is in accordance with accepted engineering practices.
SECTION 2. DESIGN
2.1 GENERAL
2.1.1 All structural steel sections and welded plate members shall be designed
in accordance with the latest edition of the AISC, “Specifications for the
Design, Fabrication, and Erection of the Structural Steel for Buildings.”
2.1.2 All light gauge cold formed, structural members and exterior covering
shall be designed in accordance with the latest edition of the AISI, “Specification
for the Design of Cold-Formed Steel Structural Members.”
2.2 DESIGN LOADS
Roof live loads shall be applied to the horizontal roof projection and shall
be as per applicable U.B.C. or I.B.C. Code. The design wind pressure shall be
applied to the primary framing and to the wall components as per applicable U.B.C.
or I.B.C. Code.
Auxiliary loads such as crane loads, mezzanine loads or excessive collateral
loads may be included in the design by special request. All load requirements
are the responsibility of the builder, architect, owner or purchaser. Please verify
your specific code requirements with your local building department.
2.3 DESIGN LOAD COMBINATIONS
Load combinations shall be done in accordance with the applicable U.B.C. or
I.B.C. Code.
SECTION 3. STRUCTURAL FRAMING
3.1. PRIMARY FRAMING
3.1.1. All hot-rolled steel plate used for flanges and webs in fabrication
of rigid frames shall conform to the requirements of ASTM Specification A-572.
Minimum yield point shall be 50,000 PSI.
3.2. SECONDARY FRAMING
3.2.l. All cold-formed structural members shall conform to the requirements
of ASTM A-570 and shall have a minimum yield strength of 50,000 PSI. Hot-rolled
structural shapes shall conform to ASTM A-36 and shall have a minimum yield strength
of 36,000 PSI.
3.2.2. Cold-formed steel sections of light gauge shall be manufactured by break
or roll forming. Dimensions shall be free from fluting or buckling. 6", 8",
10" and 12” sections are used per design requirements.
3.3. ROOF AND WALL COVERING
3.3.1. Material for Galvalume steel panels shall meet the requirements of ASTM
Specification A-446, (80,000 psi yield).
3.3.2. Roof and Wall covering shall be 26 gauge commercial high rib “R”
panel. Roof panels shall have a Galvalume finish, and wall panels shall be either
Galvalume or painted in one of Bunger Steel’s standard colors. Galvalume
is a special coating with zinc-aluminum alloy which is applied at 0.5 ounces (combined
total of both sides) per square foot.
3.3.3. Interior wall liner (if specified) shall be same commercial high rib
as exterior panel, and shall be either 26 gauge or 29 gauge (specify which).
3.4. STRUCTURAL PAINTING
3.4.1. All structural framing members that are not galvanized shall be cleaned
to remove all dirt, grease, oil and loose mill scale and shall be given one coat
of a red shop primer.
3.4.2. The primer coat thickness shall be a minimum of one mil.
3.5. PANEL PAINTING
3.5.1. The finish coat for painted steel panels, when required, shall be minimum
1 mil thickness silicone film and baked to a minimum temperature of 435 degrees
F. The silicone polyester panels (except white) shall be pigmented with color
pigments of a fade resistant type to help insure long color life. The painted
panels shall not show excessive chalking, cracking or loss of adhesion during
its warranty period.
3.5.2. Pre-treating and color coating process shall be applied by a reputable
coating firm prior to roll forming. A written 20 to 25 year warranty on roof and
wall panels are available upon request.
3.5.3. Colors shall be selected from Bunger Steel Inc. Standard Colors.
SECTION 4: STRUCTURAL
4.1. GENERAL
4.1.1. All shop welding shall conform to the requirements of the American Welding
Society Structural Code D1.1. Welders shall be fully approved by the proper authorities
in the United States. Flange to web welds shall be continuous on one side of web
using automatic sub-merged arc-welding process. All butt welds shall be full penetration
welds.
4.1.2. All framing members shall be shop fabricated for bolted held assembly.
Bolts shall meet the requirements of the following ASTM Standards, latest issue:
A-325 For quenched and tempered steel bolts.
A-307 For steel machine bolts and nuts.
4.1.3. All framing members, where necessary, shall be identified with a mark
corresponding to the erection drawings.
4.2. PRIMARY FRAMING
4.2.1. All rigid frames shall be welded, built-up "I" sections.
4.2.2. All end wall frames and columns shall be either cold-formed, mill rolled
or built up "I" sections, depending on design requirements.
4.2.3. All main frame webs, base plates, splice plates and flanges shall be
shop fabricated to include holes for installation of bolts and slots for bracing.
4.3 PURLINS AND GIRTS
4.3.1. Purlins and girts shall be "Z" or “C” shaped cold-formed
sections 6", 8”, 10” or 12" deep cold-formed sections, as
required by design. Flanges shall be no less than 2”. Purlins shall be considered
as continuous beams, lapping each other at each interior main frame. The girts
shall be either continuous or simple span (flush mounted-optional), depending on
type of framing (specify which). Purlin and girt overlap shall be 1'-0" to
6'-3" (full lap) depending on design requirements.
4.3.2. Eave strut shall be cold-formed "C" section, rolled for appropriate
roof pitch (on greater than 1:12).
4.3.3. Framed openings shall be made from sections adequate for the specified
design loads.
4.3.4. A base angle or base trim will be supplied for attachment of the base
of the sheeting to the concrete. The base angle will be attached to the concrete
slab with ram-sets or equivalent anchors (fasteners to masonry not by Bunger Steel
Inc).
4.4. BRACING
4.4.1. Diagonal galvanized cable bracing shall be used in the roof and walls
to remove longitudinal loads from the structure. Wind bracing is not required
when the diaphragm strength of the roof and/or wall sheeting is sufficient to
resist longitudinal wind forces.
4.4.2. Portal frames: When special conditions exist so that cable bracing cannot
be used, a portal frame or other type of lateral load resisting system will be
used between frames to remove longitudinal loads.
4.4.3. Flange bracing: The inside flange of all main frames shall be braced
by angles connecting to the flange and web of the frame and to the web of the
purlin or girt so that allowable compression is adequate for the given combination
of loadings.
SECTION 5: ROOF AND WALL COVERING
5.1. PANEL DESCRIPTION
5.1.1. Bunger Steel Inc. commercial high rib panels shall provide 36"
net coverage on walls and roof with lengths up to 36'. The panels shall have 4
major ribs, 12" on center, 1 1/8" deep (minimum). Trapezoidal return
ribs to taper from 1" to 3" with intermediate shoulders and an anti-capillary
flute (Siphon Groove) at the last rib. Two secondary ribs shall be formed between
the major ribs. Panels shall be overlapped one major rib at the sides. End laps
shall be a minimum of six inches. Mastic sealant shall be provided at all side
laps and end laps on roof.
5.1.2. Concealed fastener standing seam roof systems are available upon request.
5.1.3. Concealed fastener wall panels are available upon request.
SECTION 6: MISCELLANEOUS MATERIAL SPECIFICATIONS
6.1. FASTENERS
6.1.1. Structural bolts shall meet the requirements of latest issue of ASTM
Standards:
A-325 For Primary Framing Connections
A-307 For Secondary Framing
6.1.2. Panel fasteners shall be self-drilling and self-tapping type sheet metal
screws. Fasteners shall be no. 12, type "A" or type "AB",
ANSI Standard B18.6.4, hex head, galvanized carbon steel, pre-assembled with neoprene
washer. Heads shall be galvanized or color coated to match sidewall or roof panel.
Aluminum coated fasteners supplied with Galvalume panels. Lifetime Guaranteed
Fasteners (optional) also available upon request.
6.2. SEALANTS
6.2.1. Sealant for roof side laps, end laps and flashing shall be a nominal 3/8"
wide by 1/8" thick, gray Polysobutylene (butyl) Polymers pressure sensitive
tape. The material shall be non-asphaltic, non-shrinking, non-drying and non-toxic,
at temperatures from 10 degrees to 140 degrees F. Sealant shall adhere to metals,
plastics and painted surfaces.
6.2.2. Solid or closed cell, pre-formed ethylene Propylenetherpolymer closures,
matching the profile of the roof and wall panel, shall be included at the base,
gable and eave, to help assure seal for weather protection or resistance and provide
air infiltration stop on blanket insulated buildings.
6.3. FLASHING, CLOSURE AND TRIM
6.3.1. Flashing and/or trim shall be furnished at the rake, corners and eaves.
Also at framed openings and wherever necessary to provide weather protection and
a finished appearance.
6.3.2. A pre-formed ridge panel matching the slope and profile of adjoining
roof panels shall be provided along the building ridge for all roof slopes up
to 3:12. On roof slopes over a 3:12 pitch, a special ridge cap of 16” minimum
width shall be provided.
6.3.3. Optional eave gutter shall be fabricated from 26 ga. Steel with baked
on paint and supported by gutter hanging bracket spaced 36" minimum on center.
Downspouts shall be spaced as required for building size and expected rainfall
in area.
SECTION 7: ACCESSORIES
7.1. PERSONNEL DOORS
7.1.1. Door leaves shall be 1-3/4” thick, full flush, fabricated from
20 gauge
mil bonderized steel. Door frames shall be 8-1/4” deep, open channel,
fabricated from 16 gauge, mill bonderized steel. Each frame shall be prepared
for the Universal A>S>A> strike and include three (3) rubber door stops.
Door sizes are standard 3070, 4070, 6070 (specify which). Other sizes available
upon request. Panic, special hardware, and window frames cut into doors available
upon request. Personnel doors are field located.
7.2. TRANSLUCENT PANELS
7.2.1. Translucent panels shall have the same configuration as the specified
covering with an embossed finish exposed to the weather. Translucent panels shall
be of translucent polyester resin reinforced glass fiber. The polyester used shall
be specially formulated to produce a weather resistant, sun resistant, stabilized
product. Insulated translucent panels are also available.
7.3. OVERHEAD DOOR FRAMING
7.3.1. Overhead door framing shall be designed to resist applicable wind loads
and shall consist of 8" or 10" Cee section jambs and header (jamb depth
to match girt depth).
7.3.4. Overhead doors not by Bunger Steel, Inc. unless specifically stated
otherwise on the sales agreement.
SECTION 8. ERECTION (By Others) Not the responsibility of Bunger
Steel Inc. unless specifically stated otherwise in the sales agreement.
8.1. ERECTION
8.1.1. The erection of the building and the installation of the accessories,
shall be performed in a workmanlike manner with the proper tools and equipment,
by a qualified erector, as set forth in the specifications and the manufacturer's
erection drawings.
8.1.2. Bunger Steel, Inc. is not responsible for erection unless specified
otherwise in the sales agreement.
8.1.3. Upon request, the Bunger Steel Inc. may supply the name(s) of potential
persons, companies, or contractors to install concrete and/or erect the building
components or to perform other work pertaining to the installation and erection
of the building components. Buyer acknowledges that Bunger Steel Inc. has not
investigated such contractors, and that the provision of the name(s) does not
constitute a recommendation of the skill or competence of any person, company,
or contractor. Buyer agrees to rely solely on his own research and investigation
of such matters when selecting a person, company, or contractor to perform work
of any type on their project.
8.2. FIELD MODIFICATION
8.2.1. Field design modifications will not be made to any structural member
except as authorized and specified by the building manufacturer and/or approved
and certified by the manufacturer's Engineer.
SECTION 9: ANCHORAGE AND FOUNDATIONS
9.1. ANCHOR BOLTS
9.1.1. The building anchor bolts shall be designed to resist the column reaction.
The diameter and grade of anchor bolts shall be specified by the building manufacturer.
The length required shall be determined by the foundation engineer. (Anchor bolts
and templates are not furnished by Bunger Steel, Inc.). The building manufacturer
shall furnish anchor bolt setting plans.
9.2. FOUNDATIONS
9.2.1. The building foundations shall be designed by a qualified engineer and
support the building reactions and other loads required by the occupant's usage.
The foundation plans shall not be furnished by Bunger Steel, Inc unless stated
otherwise in the sales agreement.
STANDARD COLOR CHART
(Colors below are an approximation and will vary with every computer monitor.)
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| Light Stone |
Emerald Green |
Rustic Red |
Charcoal |
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| Hawaiian Blue |
Beige |
Gray |
Tan |
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| Cocoa |
Colony Green |
Polar White |
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