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1/2" Regular and 1/2" and 25/32" Structural sheathing can provide racking strength when applied over studs 16" o.c., and nailed as described in the application portion of these instructions. However, specific racking resistance requirements will be determined by local building codes. Both regular and structural sheathing do not need to be covered with building paper unless required by building codes. A continuous vapor retarder (6mil polyethylene film) must be applied on the warm side of the perimeter wall framing members.
SIZES
Regular sheathing is available in nominal 1/2" x 4'x 8', 4'x 9' and 4'x 10' square edge sheets. Structural sheathing is available in nominal 1/2" and 25/32" thickness and 4'x 8' and 4' x 9' square edge.
Table I
* The higher the R-Value, the greater the insulating power.
Properties
R-value*
(perms)
1/2" Regular Sheathing
25/32" Structural Sheathing
1/2" Structural
PRODUCT STANDARDS
Applicable product standards are ASTM C208 or ANSI/AHA A194.1
APPLICATION
Sheathing should be applied vertically with the long edges parallel to the vertical studs. Center all joints over the framing members with a 1/8" gap between edges. Leave a 1/2" gap at the doors and windows. Sheathing should extend from sill to top plate. If not, headers for adequate nailing should be provided at all horizontal joints.
For Non-Structural applications the following fastening schedule should be used.
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| Sheathing |
Size |
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| 1/2" Regular |
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| 1/2" Structural |
|
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| 25/32" Structural |
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Table III
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| Thickness and Grade
|
Fastener Type
|
Shear Stress (plf of wall)
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| . | . | Perimeter Spacing4 | ||
| . | . |
|
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|
| 1/2" Regular
|
*5
|
|
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| 1/2" Structural |
8d common nail of 11 ga. galv. roofing nail, 1 1/2" long, 7/16" head
|
|
230
|
|
| . | 7/16" crown, 16ga. galv. staple, 1 1/8" leg
|
|
200
|
150
|
|
|
1" crown, 16 ga. galv. staple, 1 1/8" leg
|
340
|
300
|
230
|
| 25/32" Structural | 8d common nail of 11 ga. galv. roofing nail, 1 3/4" long, 7/16" head
|
270
|
240
|
180
|
| . | 7/16" crown, 16ga. galv. staple, 1 1/2" leg
|
220
|
200
|
150
|
| . |
1" crown, 16 ga. galv. staple, 1 1/2" leg
|
|
290
|
|
1.
All panels edges shall be backed with 2 inch or wider framing of Douglas Fir, Larch or Southern Pine.
2.
Fiberboard sheathing diaphrams shall not be used to brace concrete or masonry walls.
3.
Fiberboard sheathing in one side only.
4.
Fasteners spaced every 6" in the field.
5.
Consult the sheathing manufacturer for information.
6.
Safety factor used was 2.8.
| A. Emco Building Products LaSalle, Québec Canada (514) 364-1387 FAX: (514) 364-4487 E-mail: bric@emcoltd.com John W. Ricketts, President |
E. International Fiberboard, Inc. Winnipeg, Manitoba Canada (204) 654 0555 FAX: (204)654-0606 E-mail: ifi@mts.net Mark Smerchanski, President |
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| B. Georgia-Pacific Corporation Atlanta, GA (800) 879-7781 FAX: (404) 230-7712 E-mail: reslate@gapac.com Rod Slate, Sales Mgr. |
F. Masonite Corporation Chicago, IL (800) 257-7885 FAX: (312) 750-1233 E-mail: nick.pavlovich@ipaper.com Nick Pavlovich, Sales & Marketing Mgr. - Industrial Products |
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| C. IKO Industries, Ltd. Calgary, Alberta Canada (905) 457-5321 FAX: (905) 450-3620 E-mail: andy.lodge@iko.com Andy Lodge, R&D Mgr. |
G. Materiaux Cascades, Inc. Louiseville, Quebec Canada (800) 5614279 FAX: (819) 228-2845 E-mail: msmith@cascades.com Michael Smith, Plant General Mgr. |
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| D. International Bildrite, Inc. International Falls, MN (763) 509-9926 FAX: (763) 283-3905 E-mail: RTB11625MPLS@aol.com Bob Boyer, Sales Mgr. |
H. Temple Diboll, TX (800) 231-6060 FAX: (800) 426-7382 E-mail: gkeeling@temple.com Gary Keeling, Product Mgr. |
1210 W. Northwest Highway, Palatine, Illinois 60067
Phone: (847) 934-8394 / Fax: (847) 934-8803
afa@fiberboard.org
