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Boise Cascade Engineered Wood Products
Southern Engineered Wood Products Specifier Guide
14 & 16 inch BCI 45s Series Joists Roof Span Table
Southern Engineered Wood Products Specifier Guide
Southern EWP
Specifier Guide - 115% and 125%
BCI 45s Series Joists - 1 3/4" Flange Width
Maximum clear span in feet and inches, based on horizontal spans.
| Live Load/ Dead Load |
14" BCI 45s | 16" BCI 45s | ||||||
|---|---|---|---|---|---|---|---|---|
| PSF | Less than 4/12 |
4/12 to 8/12 |
8/12 to 12/12 |
Less than 4/12 |
4/12 to 8/12 |
8/12 to 12/12 |
||
| 12" O.C. |
Non- Snow (125%) |
20/10 | 34'-3" |
32'-4" |
30'-0" |
38'-1" |
35'-11" |
33'-4" |
| 20/15 | 32'-6" |
30'-6" |
28'-2" |
36'-1" |
33'-10" |
31'-3" |
||
| 20/20 | 31'-0" |
29'-0" |
26'-8" |
34'-5" |
32'-3" |
29'-7" |
||
| Snow (115%) |
25/10 | 32'-7" |
30'-9" |
28'-8" |
36'-2" |
34'-2" |
31'-10" |
|
| 25/15 | 31'-1" |
29'-3" |
27'-1" |
34'-6" |
32'-6" |
30'-1" |
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| 30/10 | 31'-2" |
29'-6" |
27'-6" |
34'-7" |
32'-9" |
30'-6" |
||
| 30/15 | 29'-10" |
28'-2" |
26'-2" |
33'-2" |
31'-3" |
29'-0" |
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| 40/10 | 28'-4" |
27'-2" |
25'-8" |
31'-6" |
30'-2" |
28'-6" |
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| 40/15 | 27'-11" |
26'-5" |
24'-7" |
31'-0" |
29'-4" |
27'-4" |
||
| 50/10 | 26'-3" |
25'-2" |
23'-11" |
29'-2" |
27'-11" |
26'-6" |
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| 50/15 | 26'-3" |
25'-0" |
23'-4" |
29'-2" |
27'-9" |
25'-11" |
||
| 16" O.C. |
Non- Snow (125%) |
20/10 | 31'-1" |
29'-4" |
27'-2" |
34'-6" |
32'-7" |
30'-3" |
| 20/15 | 29'-5" |
27'-8" |
25'-6" |
32'-8" |
30'-8" |
28'-4" |
||
| 20/20 | 28'-1" |
26'-3" |
24'-2" |
31'-2" |
29'-2" |
26'-10" |
||
| Snow (115%) |
25/10 | 29'-6" |
27'-11" |
26'-0" |
32'-9" |
31'-0" |
28'-10" |
|
| 25/15 | 28'-2" |
26'-6" |
24'-6" |
31'-3" |
29'-5" |
27'-3" |
||
| 30/10 | 28'-2" |
26'-9" |
24'-11" |
31'-4" |
29'-8" |
27'-8" |
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| 30/15 | 27'-1" |
25'-6" |
23'-8" |
30'-0" |
28'-4" |
26'-4" |
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| 40/10 | 25'-8" |
24'-7" |
23'-3" |
28'-6" |
27'-4" |
25'-10" |
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| 40/15 | 25'-3" |
23'-11" |
22'-3" |
27'-6" |
26'-7" |
24'-9" |
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| 50/10 | 23'-9" |
22'-10" |
21'-8" |
26'-4" |
25'-4" |
24'-0" |
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| 50/15 | 23'-3" |
22'-8" |
21'-2" |
25'-3" |
24'-10" |
23'-6" |
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| 19.2" O.C. |
Non- Snow (125%) |
20/10 | 29'-2" |
27'-7" |
25'-7" |
32'-5" |
30'-7" |
28'-5" |
| 20/15 | 27'-8" |
26'-0" |
24'-0" |
30'-8" |
28'-10" |
26'-8" |
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| 20/20 | 26'-4" |
24'-8" |
22'-8" |
29'-3" |
27'-5" |
25'-3" |
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| Snow (115%) |
25/10 | 27'-9" |
26'-3" |
24'-5" |
30'-9" |
29'-1" |
27'-1" |
|
| 25/15 | 26'-5" |
24'-11" |
23'-1" |
29'-4" |
27'-8" |
25'-7" |
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| 30/10 | 26'-6" |
25'-1" |
23'-5" |
29'-5" |
27'-10" |
26'-0" |
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| 30/15 | 25'-5" |
24'-0" |
22'-3" |
27'-8" |
26'-7" |
24'-9" |
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| 40/10 | 24'-1" |
23'-1" |
21'-10" |
26'-4" |
25'-8" |
24'-3" |
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| 40/15 | 23'-0" |
22'-1" |
20'-11" |
25'-1" |
24'-7" |
23'-3" |
||
| 50/10 | 21'-2" |
20'-8" |
20'-0" |
24'-0" |
23'-9" |
22'-7" |
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| 50/15 | 19'-5" |
18'-10" |
17'-11" |
22'-7" |
21'-10" |
20'-10" |
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| 24" O.C. |
Non- Snow (125%) |
20/10 | 27'-1" |
25'-6" |
23'-8" |
30'-0" |
28'-4" |
26'-4" |
| 20/15 | 25'-7" |
24'-1" |
22'-2" |
28'-5" |
26'-9" |
24'-8" |
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| 20/20 | 24'-5" |
22'-10" |
21'-0" |
27'-1" |
25'-5" |
23'-4" |
||
| Snow (115%) |
25/10 | 25'-8" |
24'-3" |
22'-7" |
28'-2" |
27'-0" |
25'-1" |
|
| 25/15 | 24'-2" |
23'-1" |
21'-4" |
26'-3" |
25'-6" |
23'-9" |
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| 30/10 | 24'-3" |
23'-3" |
21'-8" |
26'-4" |
25'-10" |
24'-1" |
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| 30/15 | 22'-5" |
21'-4" |
20'-0" |
24'-9" |
24'-2" |
22'-11" |
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| 40/10 | 20'-3" |
19'-8" |
18'-11" |
23'-6" |
22'-10" |
21'-11" |
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| 40/15 | 18'-4" |
17'-7" |
16'-8" |
21'-3" |
20'-5" |
19'-4" |
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| 50/10 | 16'-10" |
16'-5" |
15'-10" |
19'-7" |
19'-1" |
18'-5" |
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| 50/15 | 15'-5" |
14'-11" |
14'-3" |
18'-0" |
17'-4" |
16'-7" |
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- Table values are limited by shear, moment, Total Load deflection equal to L/180 and Live Load deflection equal to L/240. Check the local building code for other deflection limits that may apply.
- Allowable moment has been increased by a repetitive member factor for joist spacings of 24 inches or less.
- Slope roof joists at least 1/4" over 12" to minimize ponding.
- Table values represent the most restrictive of simple or multiple span applications.
- This table was designed to apply to a broad range of applications. It may be possible to exceed the limitations of this table by analyzing a specific application with the BC CALC software.