3.1.1.1
Lap Type Panels with Exposed Fasteners
End laps shall be made over framing members with fasteners into framing
members approximately [50 mm (2 inches)] from the end of the overlapping
sheet. Side laps shall be laid away from the prevailing winds. Spacing of
fasteners shall present an orderly appearance and shall not exceed: 200 mm
(8 inches) on center at end laps of wall panels, 200 mm (8 inches) on
center at connection of panels to intermediate supports, and 450 mm (18
inches) on center at side laps of panels except when otherwise recommended
by the panel manufacturer and approved by the Contracting Officer. Side
and end laps of wall panels and joints at accessories shall be sealed.
Fasteners shall be installed in straight lines within a tolerance of 50 mm
(1/2 inch) in the length of a bay. Fasteners shall be driven normal to the
surface and to a uniform depth to seat the gasketed washers properly.
[3.1.1.2
Concealed Fastener Wall Panels
**************************************************************************
NOTE: Include this paragraph when concealed
fastening is specified.
**************************************************************************
Panels shall be fastened to framing members with concealed fastening clips
or other concealed devices standard with the manufacturer. Spacing of
fastening clips and fasteners shall be in accordance with the
manufacturer's written instructions. Spacing of fasteners and anchor clips
along the panel interlocking ribs shall not exceed 300 mm (12 inches) on
center except when otherwise recommended by the panel manufacturer and
approved by the Contracting Officer. Fasteners shall not puncture metal
sheets except as approved for flashing, closures, and trim; exposed
fasteners shall be installed in straight lines. Interlocking ribs shall be
sealed with factory-applied sealant. Joints at accessories shall be sealed.
]3.2
CLEAN UP AND FINISH TOUCH-UP
**************************************************************************
NOTE: Include optional last sentence for steel
panels in salt spray environment (i.e., within 150 m
or 500 feet of waterfront) and other corrosive
environments.
**************************************************************************
Clean exposed sheet metal work at completion of installation. Remove metal
shavings and filings. Remove grease and oil films, excess sealants,
handling marks, contamination from steel wool, fittings and drilling debris
and scrub the work clean. Exposed metal surfaces shall be free of dents,
creases, waves, scratch marks, solder or weld marks, and damage to the
finish coating. Touch up scratches in panel finish with manufacturer
supplied touch-up paint system to match panel finish. [Treat exposed cut
edges with manufacturer supplied clear coat.]
3.3
CORRECTION OF DEFICIENCIES
Where any form of deficiency is found, additional measures shall be taken
as deemed necessary by the Contracting Officer to determine the extent of
the deficiency and corrective actions shall be as directed by the
Contracting Officer.
SECTION 07413
Page 18
Previous Page
