Area A and B = .5 (5 x 10) =25
Area C = 20 x 5 = 100
Total Area = A + B + C = 100 + 25 + 25 = 150
Volume = Length x Total Area = 100 x 150 x 15,000 cu. ft.
3/4 Span Structure
Area A = .5 (12 x 5) = 30
Area B = .5 (4 x 6) = 12
Area C = 12 x 5 = 60
Area D = 6 x 6 = 36 Total Area = A + B + C + D = 30 + 12 + 60 + 36 = 138
Volume = Length x Total Area = 100 x 138 = 13,800 cu. ft.
Roundtop Structure
Area A + B = .5 ( r 2 ) = 127
Area C = 5 x 18 = 90 sq. ft.
Total Area = A + B + C = 127 + 90 + 217 = 10,850 cu. ft.
