Magna-loc, System components, Design / installation considerations – Metal Sales Magna-Loc Installation User Manual
Page 40
© Metal Sales Manufacturing Corporation / Subject to change without notice 6/12
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MAGNA-LOC
DESIGN / INSTALLATION CONSIDERATIONS (
cont
.)
Steel roofing panels are subject to dimensional changes after installation due to exposure to varying temperatures. The great-
est 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 the roof temperature to building structural temperature must be considered when designing a Magna-Loc
roof system. The floating clips for the Magna-Loc 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 Magna-Loc roof system can be installed with components that allow the panels to either float independently or fix per-
manently to the substructure. Choice of system will depend upon building design and regional temperature range
(from summer highs to winter lows).
SELECTION OF SYSTEM COMPONENTS
Magna-Loc Floating Clips- The floating clips allow 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.
Magna-Loc Fixed Clips- Fixed clips may be used on panel runs of less than 20'-0", unless thermal expansion and
contraction is a consideration. When utilizing a Fixed Utility Clip, a Pancake Head fastner must be used.
MAGNA-LOC FIXED CLIP
MAGNA-LOC FLOATING CLIP
Vertical Tab
Base
The following chart should be used to determine proper fasteners required for clip installation on the selected applica-
tions. (See Fastener Selection Guide page 17 for other fasteners available.)
* Length of Dekfast will vary depending on the total thickness of the rigid insulation and metal. (See page 22.)
** Contact your local Metal Sales branch representative for more information. (See pages 2 and 3.)
2 FASTENERS
2 FASTENERS
2 FASTENERS
CLIP OVER RIGID
INSULATION /
METAL DECK
2 FASTENERS
2 FASTENERS
1
/
4
-14 x 1
1
/
2
" SELF DRILLER NW
1
/
4
-14 x 1
1
/
2
" SELF DRILLER NW
#12-11x1
1
/
2
" LOW PROFILE WOODSCREW 2 FASTENERS
NUMBER
REQUIRED
TYPE OF FASTENER
APPLICATION
INSTALLATION
REQUIREMENTS
24 GAUGE
24 GAUGE
**CLIP
SPACING
5'-0" O.C.
4'-0" O.C.
5'-0" O.C.
STANDARD
#12-11x1
1
/
2
" LOW PROFILE WOODSCREW
22 GAUGE
4'-0" O.C.
CLIPS
OVER PURLINS
(16 GA. MIN)
CLIPS OVER
5
/
8
" WOOD DECK
DEKFAST #14*
24 GAUGE
4'-0" O.C.
22 GAUGE
4'-0" O.C.
DEKFAST #14*
STANDARD
STANDARD
STANDARD
STANDARD
STANDARD
22 GAUGE
RAKE ZEE
2
1
/
8
" UTILITY
2
3
/
8
" LOW
3
3
/
8
" HIGH
SYSTEM COMPONENTS
SYSTEM
CLIP
EAVE PLATE
THERMAL BLOCK
INSULATION
UTILITY
LOW
HIGH
2
1
/
8
" UTILITY
(FIXED ONLY)
2
3
/
8
" LOW
(FLOATING OR FIXED)
3
3
/
8
" HIGH
(FLOATING)
3
/
8
" LOW
1
3
/
8
" HIGH
NONE REQUIRED
NONE REQUIRED
1"
1
/
2
" TO 4" BLANKET
4" TO 6" BLANKET
4" TO 6" BLANKET
NONE REQUIRED