All stormwater retention/detention systems are manufactured to meet the required project specifications, be it for pipe or box applications.
ASTM C 1433
Standard Specification for Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers
ASTM C 1577
Standard Specification for Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers Designed according to AASHTO LRFD
AASHTO M 259
Standard Specification for Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers
AASHTO M 273
Standard Specification for Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers within less than 2 feet of cover subjected to Highway Loadings
ASTM C76
Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
AASHTO M170
Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe