Molding forms for making precast portal assembly sections for culverts

摘要

Molding forms for precast concrete portal assemblies are described. The molding forms include adjustable form surfaces for precasting different shaped portal assemblies from the same basic mold. The molding forms herein are particularly designed for molding portal assemblies for use at either or both end of box culverts which provide passages extending under a longitudinal embankment at skew angles rather than transversely perpendicular to the embankment access.