same coating as exterior if undersides of panels are
to be exposed and a premium coating is desired,
otherwise use 0.0125 mm 0.5 milwash coat.
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Provide factory applied, thermally cured coating to exterior and interior
of metal roof and wall panels and metal accessories. Provide exterior
finish top coat of [70 percent resin polyvinyldene fluoride][_____] with
not less than [0.005 mm][0.020 mm][_____] [0.2 mil][0.8 mil][_____] dry
film thickness. Provide exterior primer [standard with panel
manufacturer][_____] with not less than [0.005 mm][0.020 mm] [0.2 mil][0.8
mil] dry film thickness. Interior finish shall consist of [[0.005 mm][0.2
mil]dry film thickness prime coat][[0.0125 mm][0.5 mil] dry film thickness
backer coat][the same coating and dry film thickness as the exterior
coating][_____]. Provide exterior [and interior ]coating meeting test
requirements specified below. Tests shall have been performed ohn same
factory finish and thickness provided. [Provide clear factory edge coating
on all factory cut or unfinished edges.]
]2.2
INTERMEDIATE SUPPORTS
Fabricate panel subgirts, subpurlins, T-bars, Z-bars and tracks from
galvanized steel conforming to ASTM A 653/A 653M, Z275 G90, Grade D (1.6 mm
thick 16 gage and heavier), Grade A (1.3 mm thick 18 gage and lighter); or
steel conforming to ASTM A 36/A 36M, ASTM A 570/A 570M , or ASTM A 607
prime painted with zinc-rich primer. Size, shape, thickness and capacity
as required to meet the load[, insulation thickness] and deflection
criteria specified.
2.3
ATTACHMENT CLIPS
Fabricate clips from ASTM A 366/A 366M, ASTM A 570/A 570M, or ASTM A 607
steel hot-dip galvanized in accordance with ASTM A 653/A 653M, Z275 G 90,
or Series 300 stainless steel. Size, shape, thickness and capacity as
required to meet the load, insulation thickness and deflection criteria
specified.
2.4
ACCESSORIES
Sheet metal flashings, [gutters,] [downspouts,] trim, moldings, closure
strips, pre-formed crickets, caps, equipment curbs, and other similar sheet
metal accessories used in conjunction with preformed metal panels shall be
of the same material as used for the panels. Provide metal accessories
with a factory color finish to match the roofing panels, except that such
items which will be concealed after installation may be provided without
the finish if they are stainless steel. Metal shall be of a thickness not
less than that used for the panels. Thermal spacer blocks and other
thermal barriers at concealed clip fasteners shall be as recommended by the
manufacturer except that wood spacer blocks are not allowed.
2.4.1
Closures
2.4.1.1
Rib Closures
Corrosion resisting steel, closed-cell or solid-cell synthetic rubber,
neoprene or polyvinyl chloride pre-molded to match configuration of rib
opening. Material for closures shall not absorb water.
SECTION 07611N
Page 18
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