Precast Concrete Structural Design Criteria
The Standard Design Practice, C857, developed by the American Society for Testing and Materials (ASTM) for Minimum Structural Design Loading for Underground Precast Utility Structures, has been the criteria used to develop the proprietary utility vaults in this catalog. Many other products in this catalog are based on criteria provided by agencies other than UCP. The basis of the design criteria is noted on the individual product catalog pages.
UCP recommends that the suitability and application of these products be determined by a licensed Professional Engineer experienced in underground construction.
ASTM C857 utilizes AASHTO H-20 wheel loads as the assumed maximum live loads. UCP can also provide structures for more severe loading criteria such as E-80 (railroad), aircraft wheel loads, and fire truck loads.