Metal Sales Image II Installation - Manual (Page 15)

© Metal Sales Manufacturing Corporation / Subject to change without notice, effective 6/2011
15
Fastening Guide (Cont.)
Recommended Fastener Spacing (inches)
For Slopes 6:12 to 12:12
Wind Speed (mph)
Exposure Category
Roof Slope: 6:12 - 12:12
90B
Field
-14.6 psf
Edge
-17 psf
Corner
-17 psf
24 24 24
90C
Field
-18.8 psf
Edge
-21.9 psf
Corner
-21.9 psf
24 24 24
100B
Field
-18.8 psf
Edge
-21.9 psf
Corner
-21 psf
24 24 24
100C
Field
-23.2 psf
Edge
-27.1 psf
Corner
-27.1 psf
24 24 24
110B
Field
-21.8 psf
Edge
-25.5
Corner
-25.5
24 24 24
110C
Field
-28 psf
Edge
-32.8 psf
Corner
-32.8 psf
24 24 24
120B
Field
-25.9 psf
Edge
-30.3 psf
Corner
-30.3 psf
24 24 24
120C
Field
-33.3 psf
Edge
-39 psf
Corner
-39 psf
24 24 24
Zone 1 (Field)
Zone 3 (Corner)
Zone 2 (Edge)
a
a
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.