| Beam Type |
US Sections - Center Beam Supporting One Floor |
| Tributary Span, ft |
| 8 |
12 |
16 |
20 |
24 |
| Maximum Unsupported Beam Span, ft |
| 12 |
10 |
12 |
8 |
10 |
8 |
10 |
8 |
10 |
8 |
| LSB |
800LSB250-79 |
800LSB250-59 |
1000LSB300-79 |
800LSB250-59 |
800LSB250-98 |
800LSB250-79 |
1000LSB300-79 |
800LSB250-79 |
1000LSB300-98 |
800LSB250-79 |
| Steel I-Beam |
W8x13 |
W8x13 |
W8x13 |
W8x13 |
W8x13 |
W8x13 |
W8x13 |
W8x13 |
W8x13 |
W8x13 |
| CFS Back-to-Back |
(2)
1000S162-54 |
(2)
1000S162-68 |
(2)
1200S162-68 |
(2)
1000S162-68 |
(2)
1200S162-67 |
(2)
1000S162-68 |
(2)
1200A162-97 |
(2)
1000S162-97 |
(2)
1200S162-97 |
(2)
1000A162-97 |
| CFS Box-Beam |
(2)
800S162-97 |
(2)
800S162-97 |
(2)
1000S162-118 |
(2)
800S162-97 |
(2)
1000S162-118 |
(2)
1000S200-118 |
None |
(2)
1000s200-118 |
None |
None |
| LVL |
(2)
1-3/4"x11-1/4" |
(2)
1-3/4"x9-1/4" |
(2)
1-3/4"x11-1/4" |
(2)
1-3/4"x9-1/2" |
(2)
1-3/4"x9-1/2" |
(2)
1-3/4"x9-1/4" |
(2)
1-3/4"x11-1/4" |
(2)
1-3/4"x9-1/4" |
(2)
1-3/4"x14" |
(2)
1-3/4"x11-1/4" |
| Sawn Lumber SPF #2 |
(4) 2x12 |
(3) 2x12 |
(2) 4x14 |
(3) 2x12 |
(2) 4x14
(5) 2x12 |
(1) 4x14
(4) 2x12 |
(2) 4x14 |
(2) 4x14
(4) 2x12 |
(2) 4x16 |
(2) 4x14 |
| Sawn Lumber Douglas Fir |
(4) 2x12 |
(3) 2x12 |
(2) 4x14 |
(3) 2x12 |
(2) 4x14
(5) 2x12 |
(1) 4x14
(3) 2x12 |
(2) 4x14 |
(2) 4x14
(4) 2x12 |
(2) 4x16 |
(2) 4x14 |
Notes:
1. Floor live load = 40 psf
2. Floor dead load = 15 psf
3. Deflection limit: L/360 for live loads and L/240 for total loads
4. Steel I-beams, CFS, and LSB have minimum yield strength of 50 ksi
5. LVLs have 1.9E and Fe = 2.6 ksi
6. LSB is assumed to have full lateral support. |
