This specification deals with the standards for single-cell precast reinforced concrete box sections cast monolithically and proposed for use in the construction of culverts and for the conveyance of storm water industrial sewage. The reinforced concrete shall be composed of cementitious materials, mineral aggregates and water, in which steel has been embedded. The aggregates shall be sized, graded, and mixed to the proportion that will produce a homogeneous mixture. The box sections shall also undergo steam curing, water curing, and membrane curing.

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 C1433M; 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.