are shown are all of the reinforced type.Where the cost of materials is high, this type of arch design is probablymore economical than a plain concrete arch but should never be under-taken except by an experienced man. For this reason no reinforcedconcrete arch designs are shown. On the other hand,… … VNI V E R SAL PORTLAND CEMENT CO Illinois Figure S2 shows the standard design of the Illinois Highway Commis-sion, A. X. Johnson, State Highway Engineer, for a flat slab bridge of 20-foot span. _ The following table gives quantity and size of steel reinforce-ment required. Because of the low…
Bridges · Concrete · Culverts
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