Metal Sales Image II Installation - Manual (Page 14)

© Metal Sales Manufacturing Corporation / Subject to change without notice, effective 6/2011
14
Zone 1 (Field)
Zone 3 (Corner)
Zone 2 (Edge)
a
a
Fastening Guide
Recommended Fastener Spacing (inches)
For Slopes 3:12 to 6:12
Wind Speed (mph)
Exposure Category
Roof Slope: 3:12 - 6:12
90B
Field
-13.3 psf
Edge
-23.2 psf
Corner
-34.3 psf
24 24 24
90C
Field
-17.2 psf
Edge
-29.9 psf
Corner
-44.2 psf
24 24 18
100B
Field
-16.5 psf
Edge
-29.9 psf
Corner
-42.2 psf
24 24 18
100C
Field
-21.2 psf
Edge
-36.9 psf
Corner
-54.6 psf
24 24 18
110B
Field
-19.9 psf
Edge
-34.7 psf
Corner
-51.3 psf
24 24 18
110C
Field
-25.6 psf
Edge
-44.6 psf
Corner
-66 psf
24 18 12
120B
Field
-23.7 psf
Edge
-41.3 psf
Corner
-61 psf
24 24 12
120C
Field
-30.5 psf
Edge
-53.1 psf
Corner
-78.6 psf
24 18 6
Notes:
1. Fastener spacing is based on #8-18 x 3 /
4
" Truss Head Woodscrew
fastener in the nail strip attaching to 5 /
8
" plywood . 1/3 allowable
stress increase is not used.
2. Allowable spacing is based on an applied load determined using
ASCE 7-05 for the Wind Speeds. Wind Exposure Categories,
Roof area, Gable roof, Enclosed building, Topographic factor of 1,
Importance factor of 1 and mean roof height of 20'.
3. Allowable spacing is determined for wind suction using the
combination 0.6 DL + WL. Also considered is the appropriate
inward wind pressure, 20 psf live load and the weight of the panel.
Contact Metal Sales for use of other types of fasteners and substrates.