Ab c f – Metal Sales Metal Roofing and Siding User Manual

Page 12

Application Manual

Effective Date 12/08

Seating the Washer - Apply sufficient torque to seat the
washer - do not overdrive the fastener.

To Prevent Wobbling - Make sure fastener head is com-
pletely engaged in the socket. If the head does not go all
the way in the socket - tap the magnet deeper into the
socket to allow full head engagement. Metal chips will
build up from drilling and should be removed from time to
time.

Protect Drill Point - Push only hard enough on the screw
gun to engage clutch. This prevents excess friction and
burn out of the drill point. Correct pressure will allow screw
to drill and tap without binding.

A) CORRECT: Sealing material slightly visible at edge of
washer. Assembly is water tight.
B) TOO LOOSE: Sealing material is not visible; not
enough compression to seal.
C) TOO TIGHT: Washer is deformed; sealing material
pressed beyond fastener edge.

AStening

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cont

AStening

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If screws are used as a fastening method, it is best to use
a painted or plated screw, Type A or driller tip with a flat
rubber washer. The correct screw gun is also important for
the proper installation of self-drilling or self-tapping screws.
A tool with the appropriate speed and torque setting (as
recommended by the fastener manufacturer) will help
prevent fastener thread strip-out and possible damage
to the panel or its coating.Typically 40 screws should be
used per square for 2' wide panels and 80 screws should
be used per square for 3' wide panels.

Typical Screw Fastening Pattern

-p

Anel

Panel

Anti-Siphon
Groove

"-14 x

" Stitch Screw

1'-0" o.c.

#12-14 x 1

Self Driller

Sidelap Fastening Pattern

lASSic