Materials
For cast-in-place concrete culverts, use Class C concrete (
= 3.6 ksi) with the following exceptions: use Class S concrete (
= 4.0 ksi) for top slabs of culverts with overlay, with 1- to-2 course surface treatments, or with the top slab as the final riding surface (i.e., "direct traffic"). Refer to district-specific corrosion protection requirements when designing "direct traffic" culverts for regions where bridge decks are exposed to de-icing agents and/or saltwater spray with regularity. If thus required, use Class S (HPC) concrete for the top slab.
= 3.6 ksi) with the following exceptions: use Class S concrete (
= 4.0 ksi) for top slabs of culverts with overlay, with 1- to-2 course surface treatments, or with the top slab as the final riding surface (i.e., "direct traffic"). Refer to district-specific corrosion protection requirements when designing "direct traffic" culverts for regions where bridge decks are exposed to de-icing agents and/or saltwater spray with regularity. If thus required, use Class S (HPC) concrete for the top slab.
For precast concrete culverts, use Class H concrete (
= 5.0 ksi).
= 5.0 ksi).
Use Grade 60 reinforcing steel or deformed welded wire reinforcement (WWR) meeting the requirements of ASTM A1064. Refer to district-specific corrosion protection requirements when designing "direct traffic" culverts for regions where bridge decks are exposed to deicing agents and/or saltwater spray with regularity. If corrosion resistant reinforcement is required, Grade 60 hot-dip galvanized reinforcing steel may be used in accordance with Item 440.