Panels shall be [steel] [aluminum] and shall have a [mill] [factory-applied
color] finish. Panel profile shall be[recessed seam lock][flush face]
[smooth face][recessed bead][raised bead][striated][square ribbed] [beaded
rib][roll lock seam][snap lock seam][box rib] [corrugated] [standing seam]
[batten seam][ and with stiffening ribs in the flat of the panel][as shown
on drawings]. Wall panels shall have [edge configurations for overlapping
adjacent sheets] [or] [interlocking ribs for securing adjacent sheets].
Width of sheets [with overlapping configurations shall provide not less
than 24 inches of coverage in place] [, and those] [with interlocking ribs
shall provide not less than 12 inches of coverage in place]. Wall panels
shall be fastened to framework using [exposed] [or] [concealed] fasteners.
Length of panels shall be sufficient to cover the entire height of any
unbroken wall surface when length of run is 30 feet or less. When length
of run exceeds 30 feet, each sheet in the run shall extend over two or more
spans. Sheets longer than 30 feet may be furnished if approved by the
Contracting Officer. Panels shall be formed without warping, waviness, or
ripples that are not a part of the panel profile and shall be free of
damage to the finish coating system.
2.1.1
Steel Panels
**************************************************************************
NOTE: Delete this paragraph when steel panels are
not used in the project.
When a factory color finish is specified, remove
last two sentences from this paragraph.
AZ 50 or AZ 55 metallic coating is allowed for
factory-color-finished. Az 55 metallic coating is
required for mill finish.
Consider aluminum-coated steel materials for Army
projects only.
**************************************************************************
Zinc-coated steel conforming to ASTM A 653/A 653M, Structural Grade 40 and
minimum G90 galvanized smooth metallic coating; aluminum-zinc alloy coated
steel conforming to ASTM A 792/A 792M, AZ [55] [50] coating[; or
aluminum-coated steel conforming to ASTM A 463/A 463M, Type 2, coating
designation T2 65]. Prepainted steel sheet shall also comply with ASTM A
755/A 755M. Wall panel material shall be minimum [0.60 mm (24 gage)][0.76
mm (22 gage)] thick prior to coating application, and as required to meet
wind load requirements. Panels shall be within 95 percent of the nominal
thickness. Prior to shipment, mill finish panels shall be treated with a
passivating chemical and oiled to inhibit the formation of oxide corrosion
products. Panels that have become wet during shipment and have started to
oxidize shall be rejected.
2.1.2
Aluminum Panels
**************************************************************************
NOTE: Delete this paragraph when aluminum panels
are not used in the project.
**************************************************************************
Alloy 3003 or 3004 conforming to ASTM B 209, temper as required for the
forming operation; minimum [0.80 mm (0.032 inch)][1.0 mm (0.040 inch)]
SECTION 07413
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