This section is from the book "Building Construction And Superintendence", by F. E. Kidder. Also available from Amazon: Building Construction And Superintendence.
Office Buildings. Total load, 93 pounds per square foot.
Size of Joists. | Dist. on Centres. | White Pine. | Spruce or Norway Pine. | Oregon or Texas Pine. | Georgia Pine. | ||||
Ins. | Ft. | Ins. | Ft. | Ins. | Ft. | Ins. | Ft. | Ins. | |
3x8 | 12 | 12 | 10 | 13 | 9 | 14 | 2 | 15 | 4 |
3x8 | 16 | 11 | 8 | 12 | 6 | 12 | 10 | 13 | 10 |
2x10 | 12 | 14 | 1 | 15 | 1 | 15 | 6 | 16 | 7 |
2x10 | 16 | 12 | 9 | 13 | 8 | 14 | 1 | 15 | 2 |
3x10 | 12 | 16 | 1 | 17 | 3 | 17 | 9 | 19 | 2 |
3x10 | 16 | 14 | 8 | 15 | 8 | 16 | 2 | 17 | 5 |
2x12 | 12 | 16 | 10 | 18 | 1 | 18 | 8 | 20 | 1 |
2x12 | 16 | 15 | 4 | 16 | 5 | 17 | 0 | 18 | 3 |
Total load. 96 pounds per square foot. | |||||||||
3x12 | 12 | 19 | 2 | 20 | 6 | 21 | 2 | 22 | 9 |
3x12 | 16 | 17 | 5 | 18 | 7 | 19 | 3 | 20 | 8 |
2x14 | 12 | 19 | 6 | 20 | 10 | 21 | 7 | 23 | 2 |
2x14 | 16 | 17 | 9 | 19 | 0 | 19 | 7 | 21 | 2 |
2½x14 | 12 | 21 | 1 | 22 | 6 | 23 | 2 | 25 | 0 |
2½x14 | 16 | 19 | 2 | 20 | 4 | 21 | 2 | 22 | 8 |
3x14 | 12 | 22 | 4 | 23 | 10 | 24 | 8 | 27 | 7 |
3x14 | 16 | 20 | 4 | 21 | 8 | 22 | 5 | 24 | 1 |
 
Continue to: