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Box culverts are designed for traffic loads as required by the customer complying with ASTM C-1433.

 

BOX CULVERT SPECIFICATIONS

BOX SIZE (SPAN X RISE)
WALL THIKNESS
ESTIMATED WEIGHT LBS/FOOT
AREA
EQUIVALENT ROUND DIAMETER
TOP BOTTOM SIDES
3×2 7″ 6″ 4″ 631.1 5.8 32.7
3×3 7” 6″ 4″ 737.8 8.8 40.3
4×2 8” 6″ 5″ 956.8 7.7 37.7
4×3 8” 6″ 5″ 1091.1 11.7 46.5
4×4 8” 6″ 5″ 1224.4 15.7 53.8
5×3 8” 7″ 6″ 1511.1 14.5 51.6
5×4 8” 7″ 6″ 1671.1 19.5 60.0
5×5 8” 7″ 6″ 1831.1 24.5 67.3
6×3 8” 7″ 7″ 1997.8 17.3 56.5
6×4 8” 7″ 7″ 2184.5 23.3 65.6
6×5 8” 7″ 7″ 2371.4 29.3 73.5
6×6 8” 7″ 7″ 2557.8 35.3 80.7
7×4 8” 8” 8” 2693.3 27.1 70.7
7×5 8” 8” 8” 2906.7 34.1 79.3
7×6 8” 8” 8” 3120.0 41.1 87.1
7×7 8” 8” 8” 3333.3 48.1 94.2
8×4 8” 8” 8” 2982.2 31.1 75.8
8×5 8” 8” 8” 3195.6 39.1 85.0
8×6 8” 8” 8” 3408.9 47.1 93.2
8×7 8” 8” 8” 3622.2 55.1 100.9
8×8 8” 8” 8” 3835.6 63.1 107.9
9×5 9″ 9″ 9″ 3891.1 43.9 90.0
9×6 9″ 9″ 9″ 4131.1 52.9 98.8
9×7 9″ 9″ 9″ 4371.1 61.9 106.9
9×8 9″ 9″ 9″ 4611.1 70.9 114.4
9×9 9″ 9″ 9″ 4851.1 79.9 120.7
10×5 10″ 10″ 10″ 4657.8 48.6 94.7
10×6 10″ 10″ 10″ 4924.4 58.6 104.0
10×7 10″ 10″ 10″ 5191.1 68.6 112.5
10×8 10″ 10″ 10″ 5457.8 78.6 120.5
10×9 10″ 10″ 10″ 5724.4 88.6 127.9
10×10 10″ 10″ 10″ 5991.1 98.6 134.9
11×4 11″ 11″ 11″ 5207.8 42.3 88.1
11×6 11″ 11″ 11″ 5793.4 64.3 108.6
11×8 11″ 11″ 11″ 6379.0 86.3 125.8
11×10 11″ 11″ 11″ 6967.8 108.3 140.9
11×11 11″ 11″ 11″ 7259.0 119.3 147.9
12×4 12″ 12″ 12″ 6080.0 46.0 91.8
12×6 12″ 12″ 12″ 6720.0 70.0 113.3
12×8 12″ 12″ 12″ 7360.0 94.0 131.3
12×10 12″ 12″ 12″ 8000.0 118.0 147.1
12×12 12″ 12″ 12″ 8640.0 142.0 161.4