Box Units

A simple road crossing can be installed and backfilled in one day. These units can also be installed in virtually any weather condition. Concast manufactures box units in accordance with the industry’s highest quality standards. The box units can be produced either by the efficient dry cast concrete process, or the versatile wet cast concrete process. Precast sections are also available as an open footing culvert, also known as a 3-sided box or Tri-Span.

Dry cast concrete box units are available in the 9 standard sizes listed in OPSS 1821, Table 1. All 9 sizes are supplied with a single offset joint and a pre-lubricated rubber gasket.

Wet cast concrete box units are available in hundreds of span, rise & wall thickness combinations to suit any application. Each precast section can be supplied with a shiplap joint to be filled with a mastic or mortar.

The standard lay length for all box sizes is 2.44m. Longer or shorter lengths are available to meet design and logistics limitations, and project requirements.