| α = 0.0026 | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| - | fc' = 3000 (psi) = 21 (MPa) | fc' = 4000 (psi) = 28 (MPa) | fc' = 5000 (psi) = 35 (MPa) | fc' = 6000 (psi) = 42 (MPa) | fc' = 9000 (psi) = 63 (MPa) | fc' = 12000 (psi) = 84 (MPa) | ||||||||||||||||||
| b (in) | 6 | 8 | 10 | 12 | 6 | 8 | 10 | 12 | 6 | 8 | 10 | 12 | 6 | 8 | 10 | 12 | 6 | 8 | 10 | 12 | 6 | 8 | 10 | 12 |
| b (mm) | 150 | 200 | 250 | 300 | 150 | 200 | 250 | 300 | 150 | 200 | 250 | 300 | 150 | 200 | 250 | 300 | 150 | 200 | 250 | 300 | 150 | 200 | 250 | 300 |
| - | w = "1 kips/ft = 14.6 kN/m" | |||||||||||||||||||||||
| ρ = 0 | 27.1 | 29.9 | 32.2 | 34.2 | 28.5 | 31.3 | 33.8 | 35.9 | 29.5 | 32.5 | 35.0 | 37.2 | 30.5 | 33.5 | 36.1 | 38.4 | 32.6 | 35.9 | 38.6 | 41.1 | 34.2 | 37.6 | 40.5 | 43.1 |
| ρ = 0.5 ρb | 28.0 | 30.9 | 33.2 | 35.3 | 29.5 | 32.5 | 35.0 | 37.2 | 30.7 | 33.8 | 36.4 | 38.6 | 31.6 | 34.8 | 37.5 | 39.8 | 33.5 | 36.9 | 39.8 | 42.3 | 35.3 | 38.8 | 41.8 | 44.5 |
| ρ = ρmax = 0.634ρb | 28.2 | 31.1 | 33.5 | 35.6 | 29.8 | 32.8 | 35.3 | 37.5 | 30.9 | 34.0 | 36.7 | 39.0 | 31.7 | 34.9 | 37.6 | 40.0 | 33.9 | 37.3 | 40.1 | 42.7 | 35.7 | 39.3 | 42.3 | 44.9 |
| ρ = ρt = 0.724ρb | 28.4 | 31.2 | 33.6 | 35.8 | 29.9 | 32.9 | 35.5 | 37.7 | 31.1 | 34.2 | 36.8 | 39.1 | 31.9 | 35.1 | 37.8 | 40.2 | 34.0 | 37.5 | 40.4 | 42.9 | 35.9 | 39.5 | 42.5 | 45.2 |
| ρ = ρb | 28.8 | 31.7 | 34.1 | 36.2 | 30.4 | 33.4 | 36.0 | 38.3 | 31.5 | 34.7 | 37.4 | 39.7 | 32.6 | 35.8 | 38.6 | 41.0 | 34.3 | 37.8 | 40.7 | 43.3 | 36.2 | 39.8 | 42.9 | 45.6 |
| Avg. = | 28.1 | 30.9 | 33.3 | 35.4 | 29.6 | 32.6 | 35.1 | 37.3 | 30.7 | 33.8 | 36.5 | 38.7 | 31.7 | 34.8 | 37.5 | 39.9 | 33.7 | 37.1 | 39.9 | 42.4 | 35.4 | 39.0 | 42.0 | 44.7 |
| - | w = "2 kips/ft = 29.2 kN/m" | |||||||||||||||||||||||
| ρ = 0 | 21.5 | 23.7 | 25.5 | 27.1 | 22.6 | 24.9 | 26.8 | 28.5 | 23.5 | 25.8 | 27.8 | 29.5 | 24.2 | 26.6 | 28.7 | 30.5 | 25.9 | 28.5 | 30.7 | 32.6 | 27.1 | 29.9 | 32.2 | 34.2 |
| ρ = 0.5 ρb | 22.2 | 24.5 | 26.4 | 28.0 | 23.4 | 25.8 | 27.8 | 29.5 | 24.3 | 26.8 | 28.9 | 30.7 | 25.1 | 27.6 | 29.8 | 31.6 | 26.6 | 29.3 | 31.6 | 33.5 | 28.0 | 30.8 | 33.2 | 35.3 |
| ρ = ρmax = 0.634ρb | 22.4 | 24.7 | 26.6 | 28.2 | 23.6 | 26.0 | 28.0 | 29.8 | 24.5 | 27.0 | 29.1 | 30.9 | 25.2 | 27.7 | 29.9 | 31.7 | 26.9 | 29.6 | 31.9 | 33.9 | 28.3 | 31.2 | 33.6 | 35.7 |
| ρ = ρt = 0.724ρb | 22.5 | 24.8 | 26.7 | 28.4 | 23.8 | 26.1 | 28.2 | 29.9 | 24.7 | 27.1 | 29.2 | 31.1 | 25.3 | 27.9 | 30.0 | 31.9 | 27.0 | 29.7 | 32.0 | 34.0 | 28.5 | 31.3 | 33.7 | 35.9 |
| ρ = ρb | 22.8 | 25.1 | 27.1 | 28.8 | 24.1 | 26.5 | 28.6 | 30.4 | 25.0 | 27.5 | 29.7 | 31.5 | 25.8 | 28.4 | 30.6 | 32.6 | 27.3 | 30.0 | 32.3 | 34.3 | 28.7 | 31.6 | 34.1 | 36.2 |
| Avg. = | 22.3 | 24.6 | 26.5 | 28.1 | 23.5 | 25.9 | 27.9 | 29.6 | 24.4 | 26.9 | 28.9 | 30.7 | 25.1 | 27.7 | 29.8 | 31.7 | 26.7 | 29.4 | 31.7 | 33.7 | 28.1 | 31.0 | 33.4 | 35.4 |
| - | w = "3 kips/ft = 4.08 kN/m" | |||||||||||||||||||||||
| ρ = 0 | 18.8 | 20.7 | 22.3 | 23.7 | 19.7 | 21.7 | 23.4 | 24.9 | 20.5 | 22.5 | 24.3 | 25.8 | 21.1 | 23.2 | 25.0 | 26.6 | 22.6 | 24.9 | 26.8 | 28.5 | 23.7 | 26.1 | 28.1 | 29.9 |
| ρ = 0.5 ρb | 19.4 | 21.4 | 23.0 | 24.5 | 20.5 | 22.5 | 24.3 | 25.8 | 21.3 | 23.4 | 25.2 | 26.8 | 21.9 | 24.1 | 26.0 | 27.6 | 23.3 | 25.6 | 27.6 | 29.3 | 24.5 | 26.9 | 29.0 | 30.8 |
| ρ = ρmax = 0.634ρb | 19.6 | 21.6 | 23.2 | 24.7 | 20.6 | 22.7 | 24.5 | 26.0 | 21.4 | 23.6 | 25.4 | 27.0 | 22.0 | 24.2 | 26.1 | 27.7 | 23.5 | 25.8 | 27.8 | 29.6 | 24.7 | 27.2 | 29.3 | 31.2 |
| ρ = ρt = 0.724ρb | 19.7 | 21.7 | 23.3 | 24.8 | 20.8 | 22.8 | 24.6 | 26.1 | 21.5 | 23.7 | 25.5 | 27.1 | 22.1 | 24.3 | 26.2 | 27.9 | 23.6 | 26.0 | 28.0 | 29.7 | 24.9 | 27.4 | 29.5 | 31.3 |
| ρ = ρb | 19.9 | 22.0 | 23.6 | 25.1 | 21.1 | 23.2 | 25.0 | 26.5 | 21.9 | 24.1 | 25.9 | 27.5 | 22.6 | 24.8 | 26.8 | 28.4 | 23.8 | 26.2 | 28.2 | 30.0 | 25.1 | 27.6 | 29.8 | 31.6 |
| Avg. = | 19.5 | 21.5 | 23.1 | 24.6 | 20.5 | 22.6 | 24.3 | 25.9 | 21.3 | 23.5 | 25.3 | 26.9 | 21.9 | 24.2 | 26.0 | 27.7 | 23.3 | 25.7 | 27.7 | 29.4 | 24.6 | 27.0 | 29.1 | 31.0 |
| - | w = "4 kips/ft = 58.4 kN/m" | |||||||||||||||||||||||
| ρ = 0 | 17.1 | 18.8 | 20.3 | 21.5 | 17.9 | 19.7 | 21.3 | 22.6 | 18.6 | 20.5 | 22.1 | 23.5 | 19.2 | 21.1 | 22.7 | 24.2 | 20.5 | 22.6 | 24.3 | 25.9 | 21.5 | 23.7 | 25.5 | 27.1 |
| ρ = 0.5 ρb | 17.7 | 19.4 | 20.9 | 22.2 | 18.6 | 20.5 | 22.1 | 23.4 | 19.3 | 21.3 | 22.9 | 24.3 | 19.9 | 21.9 | 23.6 | 25.1 | 21.1 | 23.3 | 25.1 | 26.6 | 22.2 | 24.5 | 26.4 | 28.0 |
| ρ = ρmax = 0.634ρb | 17.8 | 19.6 | 21.1 | 22.4 | 18.8 | 20.6 | 22.2 | 23.6 | 19.5 | 21.4 | 23.1 | 24.5 | 20.0 | 22.0 | 23.7 | 25.2 | 21.3 | 23.5 | 25.3 | 26.9 | 22.5 | 24.7 | 26.6 | 28.3 |
| ρ = ρt = 0.724ρb | 17.9 | 19.7 | 21.2 | 22.5 | 18.9 | 20.8 | 22.4 | 23.8 | 19.6 | 21.5 | 23.2 | 24.7 | 20.1 | 22.1 | 23.8 | 25.3 | 21.4 | 23.6 | 25.4 | 27.0 | 22.6 | 24.9 | 26.8 | 28.5 |
| ρ = ρb | 18.1 | 19.9 | 21.5 | 22.8 | 19.1 | 21.1 | 22.7 | 24.1 | 19.9 | 21.9 | 23.6 | 25.0 | 20.5 | 22.6 | 24.3 | 25.8 | 21.6 | 23.8 | 25.6 | 27.3 | 22.8 | 25.1 | 27.0 | 28.7 |
| Avg. = | 17.7 | 19.5 | 21.0 | 22.3 | 18.7 | 20.5 | 22.1 | 23.5 | 19.4 | 21.3 | 23.0 | 24.4 | 19.9 | 21.9 | 23.6 | 25.1 | 21.2 | 23.3 | 25.1 | 26.7 | 22.3 | 24.6 | 26.5 | 28.1 |