RECOMMENDATIONS FOR WIND ONLY CASE
The Sheathing and Nailing Schedule
recommended applies to the ground
and ceiling diaphragms and shear walls. The recommended values are for
the max loads experienced, therefore this sheathing will be safe to use
over the entire perimeter of the house.
The Sheathing and Nailing Schedule required to resist Wind forces
due to Hurricanes are as follows:
Diaphragm
| Hurricane
Category |
Sheathing
Grade |
Common
Nail Size |
Minimum
Fastener Penetration in Framing (in) |
Minimum
Nominal Panel Thickness (in) |
Minimum
Nominal Framing Width (in) |
Panel
edge spacing (in) |
| 1 |
Structural I |
6d |
1.250 |
0.313 |
3 |
6 |
| 2 |
Structural I |
6d |
1.250 |
0.313 |
3 |
6 |
| 3 |
Structural I |
6d |
1.250 |
0.313 |
2 |
4 |
| 4 |
Structural I |
8d |
1.375 |
0.313 |
2 |
4 |
| 5* |
Structural I |
10d |
1.500 |
0.469 |
2 |
3 |
* The sheathing and nailing schedule
choosen for Hurricane category
5 is only for the lower bound of the force and this does not ensurethat
it will resist larger loads.
Shear Wall
| Hurricane
Category |
Sheathing
Grade |
Common
Nail Size |
Minimum
Fastener Penetration in Framing (in) |
Minimum
Nominal Panel Thickness (in) |
Panel
edge spacing (in) |
| 1 |
Structural I |
10d |
1.500 |
0.469 |
6 |
| 2 |
Structural I |
8d |
1.375 |
0.375 |
4 |
| 3 |
Structural I |
10d |
1.500 |
0.469 |
4 |
| 4 |
Structural I |
8d |
1.375 |
0.469 |
2 |
| 5* |
Structural I |
10d |
1.500 |
0.469 |
2 |
* The sheathing and nailing schedule
choosen for Hurricane category
5 is only for the lower bound of the force and this does not ensure
that it will resist larger loads.
RECOMMENDATIONS FOR WIND AND
WATER CASE
The Sheathing and Nailing schedule
required to resist Wind and Water
forces due to Hurricanes are as follows:
Diaphragms
| Hurricane
Category |
Sheathing
Grade |
Common
Nail Size |
Minimum
Fastener Penetration in Framing (in) |
Minimum
Nominal Panel Thickness (in) |
Minimum
Nominal Framing Width (in) |
Panel
edge spacing (in) |
| 1 |
Structural I |
8d |
1.375 |
0.375 |
2 |
3 |
| 2* |
Structural I |
10d |
1.500 |
0.469 |
3 |
3 |
| 3 |
not adequate |
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| 4 |
not adequate |
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| 5 |
not adequate |
|||||
* The sheathing and nailing schedule
choosen for Hurricane category
2 is only for the lower bound of the force and this sheathing and
nailing schedule would not be adequate for the upper bound.
Shear Wall
| Hurricane
Category |
Sheathing
Grade |
Common
Nail Size |
Minimum
Fastener Penetration in Framing (in) |
Minimum
Nominal Panel Thickness (in) |
Panel
edge spacing (in) |
| 1 |
Structural I |
10d |
1.500 |
0.469 |
2 |
| 2 |
not adequate |
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| 3 |
not adequate |
||||
| 4 |
not adequate |
||||
| 5 |
not adequate |
||||
FINAL RECOMMENDATIONS
Wood sheathing is only adequate to resist Hurricane Category 1 Wind and Surge forces when the house is located right on the coast. However, for categories greater than 2, wood materials are not adequate to resist the forces. A composite structure consisting of steel or concrete used in conjuncture with wood in order to resist the stronger forces.