This specification covers single-cell precast reinforced concrete monolithic box sections for use in the construction of culverts, storm drains, and sewers. The products manufactured in accordance with this specification are designated into two types according to span, rise, and design earth cover. The materials for the designed products include reinforced concrete, cementitious materials, aggregates, steel reinforcements, and optional admixtures and blends. The products manufactured by steam curing, water curing, and membrane curing should have tongue and groove ends of such design that the box sections can be laid together to make a continuous line of box sections.

1.1 This specification covers single-cell precast reinforced concrete box sections cast monolithically and intended to be used for the construction of culverts and for the conveyance of storm water industrial wastes and sewage.

1.2 This specification is the companion to SI Specification C 1433M; therefore, no SI equivalents are shown in this specification.

Note 1—This specification is primarily a manufacturing and purchasing specification. However, standard designs are included and the criteria used to develop these designs are given in Appendix X1. The successful performance of this product depends upon the proper selection of the box section, bedding, backfill, and care that the installation conforms to the construction specifications. The purchaser of the precast reinforced concrete box sections specified herein is cautioned that proper correlation of the loading conditions and the field requirements with the box section specified, and provision for inspection at the construction site, are required.