Snap-loc 24, System components – Metal Sales Snap-Loc 24 Manual User Manual
Page 12
PSN-12
SNAP-LOC 24
®
© Metal Sales Manufacturing Corporation/ Subject to change without notice/ Effective Date 9/11
800.406.7387 (Corporate Office) • www.metalsales.us.com
d
esign
/ i
nsTallaTion
C
onsideraTions
(
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)
Steel roofing panels are subject to dimensional changes after installation due to exposure to varying temperatures. The greatest
influence is solar energy. Steel roofing absorbs various amounts of heat depending upon color, finish, angle of exposure, and
time of exposure.
The relationship of ambient temperature to building structural temperature must be considered when designing a Snap-Loc 24
roof system. The clips for the Snap-Loc 24 panels are designed for expansion and contraction of the panels in the longitudinal
direction. Lateral expansion and contraction is accommodated by the configuration of the panel cross section and causes
negligible panel movement.
When the total length of panel run exceeds the capability of the clips to accommodate the thermal movement, expansion joints
must be designed into the structure.
SYSTEM EXPANSION / CONTRACTION
The following information should be used to determine system components needed once installation size has been selected. Refer
to pages PGI-12-14 for appropriate fastener selections.
SELECTION OF SYSTEM COMPONENTS
Snap-Loc 24 Panel Clips-
-The floating clip allows the roof surface (panels) to move independently of the roof substructure to allow for thermal expansion
and contraction. These clips are designed with a vertical tab that slides along the base section of the clip. Clips are placed
along the male leg of each panel prior to installing adjacent panels. Design wind uplift requirements must be considered for
proper clip spacing.
-The fixed clip does not allow the roof surface (panels) to move independently of the roof substructure allowing for thermal
contraction. These clips are only recommended for buildings designed with panel lengths less than 30'-0".
Vertical tab
Base
The following chart should be used to determine proper fasteners required for clip installation on the selected applications.
(See Product General Information page PGI-12-14 for other fasteners available).
* Length of Deck Screw will vary depending on the total thickness of the rigid insulation and metal (see page PGI-12).
** Based on UL580, subject to project loading requirements, closer clip spacing may be required. Contact your local Metal Sales
branch representative for more information (see pages PGI-2 and 3).
2 FASTENERS
2 FASTENERS
CLIP OVER RIGID
INSULATION /
METAL DECK
1
/
4
-14 x 1
1
/
2
" SELF DRILLER NW
#10 X 1" PANCAKE HEAD WOOD
2 FASTENERS
NUMBER
REQUIRED
TYPE OF FASTENER
APPLICATION
INSTALLATION
REQUIREMENTS
24 GAUGE
24 GAUGE
**CLIP
SPACING
5'-0" O.C.
BY DESIGN
STANDARD
CLIPS
OVER PURLINS
(16 GA. MIN)
CLIPS OVER
5
/
8
" WOOD DECK
DECK SCREW #14*
24 GAUGE
BY DESIGN
STANDARD
STANDARD
RAKE ANGLE
3
1
/
8
" LOW
4
1
/
8
" LOW
SYSTEM COMPONENTS
SYSTEM
CLIP
EAVE PLATE
THERMAL BLOCK
INSULATION
LOW
HIGH
3
1
/
4
" LOW
4
1
/
4
" HIGH
1
1
/
4
" HIGH
NONE REQUIRED
1"
4" TO 6" BLANKET
4" TO 6" BLANKET
1
/
4
" LOW
SNAP-LOC 24 FIXED PANEL CLIP
SNAP-LOC 24 FLOATING PANEL CLIP
Vertical tab
Base