Aug 24, 2021 · material transport carts precast concrete workshop using 120 ton Bridge Economy and Life Cycle Costs of Steel & Concrete Bridges Material Girders = $21,463 Deck Panels = $ 7,999 Reinf Steel = $ 3,135 Concrete = $ 4,180 Labor = $ 5,522 Equipment* = $ 500 SUPER TOTAL = $42,799 SUPER TOTAL = $37.54 / sq. ft. Superstructure Costs Material Slab