Wood Compression Members:
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| ● |
Vertical members required to support the load transfer from the holdown system. |
| ● |
The EB System takes advantage of 16" o.c. standard framing as a part of the compression requirements. |
| ● |
All members are sized on the lower capacity of axial buckling or compression perpendicular to grain on floor plate. |
| ● |
The minimum amount of compression members must equal or exceed the tension force required on each level. |
| ● |
The capacities shown below are based on NDS 2005. |
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COMPRESSION MEMBER SELECTION - DOUGLAS FIR LARCH
|
| FRAMING |
LUMBER SIZE (SINGLE
MEMBER) |
LUMBER GRADE |
PERP. TO GRAIN |
LUMBER GRADE |
| 8 FT |
9 FT |
10 FT |
11 FT |
12 FT |
| (133) |
(160) |
(133) |
(160) |
(133) |
(160) |
(133) |
(160) |
(133) |
(160) |
| 4-inch Wall |
2x4 |
No. 2 |
3,281 |
2,427 |
2,485 |
1,975 |
2,009 |
1,631 |
1,652 |
1,366 |
1,379 |
1,159 |
1,168 |
| 3x4 |
No. 2 |
5,469 |
4,045 |
4,142 |
3,292 |
3,348 |
2,718 |
2,753 |
2,276 |
2,299 |
1,931 |
1,947 |
| 4x4 |
No. 1 |
7,656 |
7,656 |
7,656 |
6,210 |
6,275 |
5,090 |
5,131 |
4,242 |
4,269 |
3,586 |
3,605 |
| 4x6 |
No. 1 |
12,031 |
12,031 |
12,031 |
9,730 |
9,838 |
7,981 |
8,049 |
6,654 |
6,699 |
5,627 |
5,658 |
| 4x8 |
No. 1 |
15,859 |
15,859 |
15,859 |
12,784 |
12,935 |
10,494 |
10,589 |
8,754 |
8,816 |
7,406 |
7,449 |
| 4x10 |
No. 1 |
20,234 |
20,130 |
20,234 |
16,251 |
16,456 |
13,352 |
13,480 |
11,145 |
11,229 |
9,432 |
9,490 |
| 4x12 |
No. 1 |
24,609 |
24,482 |
24,609 |
19,765 |
20,015 |
16,239 |
16,395 |
13,554 |
13,657 |
11,472 |
11,542 |
| 6-inch Wall |
2x6 |
No. 2 |
5,156 |
5,156 |
5,156 |
5,156 |
5,156 |
5,156 |
5,156 |
4,745 |
4,916 |
4,125 |
4,238 |
| 6x4 |
No. 1 |
12,031 |
12,031 |
12,031 |
12,031 |
12,031 |
12,031 |
12,031 |
12,031 |
12,031 |
12,031 |
12,031 |
| 6x6 |
No. 1 |
18,906 |
18,906 |
18,906 |
18,906 |
18,906 |
18,906 |
18,906 |
18,906 |
18,906 |
18,906 |
18,906 |
| 6x8 |
No. 1 |
24,922 |
24,922 |
24,922 |
24,922 |
24,922 |
24,922 |
24,922 |
24,922 |
24,922 |
24,922 |
24,922 |
| 6x10 |
No. 1 |
31,797 |
31,797 |
31,797 |
31,797 |
31,797 |
31,797 |
31,797 |
31,797 |
31,797 |
31,609 |
31,797 |
| 6x12 |
No. 1 |
38,672 |
38,672 |
38,672 |
38,672 |
38,672 |
38,672 |
38,672 |
38,672 |
38,672 |
38,444 |
38,672 |
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COMPRESSION MEMBER SELECTION - HEM FIR
|
| FRAMING |
LUMBER SIZE (SINGLE
MEMBER) |
LUMBER GRADE |
PERP. TO GRAIN |
LUMBER GRADE |
| 8 FT |
9 FT |
10 FT |
11 FT |
12 FT |
| (133) |
(160) |
(133) |
(160) |
(133) |
(160) |
(133) |
(160) |
(133) |
(160) |
| 4-inch Wall |
2x4 |
No. 2 |
2,126 |
2,126 |
2,126 |
1,969 |
2,004 |
1,627 |
1,649 |
1,363 |
1,377 |
1,157 |
1,167 |
| 3x4 |
No. 2 |
3,544 |
3,544 |
3,544 |
3,282 |
3,340 |
2,712 |
2,748 |
2,272 |
2,296 |
1,928 |
1,944 |
| 4x4 |
No. 1 |
4,961 |
4,961 |
4,961 |
4,961 |
4,961 |
4,496 |
4,531 |
3,746 |
3,769 |
3,166 |
3,182 |
| 4x6 |
No. 1 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
7,049 |
7,108 |
5,876 |
5,915 |
4,968 |
4,995 |
| 4x8 |
No. 1 |
10,277 |
10,277 |
10,277 |
10,277 |
10,277 |
9,270 |
9,351 |
7,731 |
7,784 |
6,539 |
6,576 |
| 4x10 |
No. 1 |
13,112 |
13,112 |
13,112 |
13,112 |
13,112 |
11,795 |
11,905 |
9,842 |
9,915 |
8,329 |
8,379 |
| 4x12 |
No. 1 |
15,947 |
15,947 |
15,947 |
15,947 |
15,947 |
14,345 |
14,479 |
11,971 |
12,059 |
10,130 |
10,190 |
| 6-inch Wall |
2x6 |
No. 2 |
3,341 |
3,341 |
3,341 |
3,341 |
3,341 |
3,341 |
3,341 |
3,341 |
3,341 |
3,341 |
3,341 |
| 6x4 |
No. 1 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
7,796 |
| 6x6 |
No. 1 |
12,251 |
12,251 |
12,251 |
12,251 |
12,251 |
12,251 |
12,251 |
12,251 |
12,251 |
12,251 |
12,251 |
| 6x8 |
No. 1 |
16,149 |
16,149 |
16,149 |
16,149 |
16,149 |
16,149 |
16,149 |
16,149 |
16,149 |
16,149 |
16,149 |
| 6x10 |
No. 1 |
20,604 |
20,604 |
20,604 |
20,604 |
20,604 |
20,604 |
20,604 |
20,604 |
20,604 |
20,604 |
20,604 |
| 6x12 |
No. 1 |
25,059 |
25,059 |
25,059 |
25,059 |
25,059 |
25,059 |
25,059 |
25,059 |
25,059 |
25,059 |
25,059 |
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