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Precast box culverts are available in 3 to 12 feet spans and rises. Standard box section length is 6 to 8 feet. Single and multi-barrel precast box units are available. Precast headwalls and wingwalls are available for box end treatment. Joints are typically tongue and groove for packing mastic joint compound, butyl gaskets or mortar to meet ASHTO M198. A large assortment of fittings are available including manhole and lateral tees, elbows, wyes, reducers, battered and skewed ends, adapters, caps/plugs, etc. A variety of linings and coatings are available if required by project conditions. Standard ASTM C789 (AASHTO M259), C850 (AASHTO M273) and PS62 box culvert designs as well as specialized designs and geometry. Special designs available for deep fills, jacking special loads, etc.