Frequently Asked Questions
Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and lifted into place. In contrast, standard concrete is poured into site-specific forms and cured on site in varied weather environments.
- Canadian Standards Association CSA A257 for circular pipe and manholes, A23.4-16 for rectangular pipes and manholes.
- Canadian Precast Concrete Quality Assurance (CPCQA) for catchbasins, circular pipe and manholes and elliptical pipe.
- BNQ (Bureau de Normalisation du Quebec) 2622-126 for round pipe from 300 to 1800mm in diameter.
- Ontario Provincial Standard Specifications
- OPSS 1351 – Manholes, catchbasins, ditch inlets and valve chambers
- OPSS 1820 – Circular pipe
- OPSS 1821 – Box culverts
Most municipal standards refer to provincial standard specifications (OPSS’s) or drawings (OPSD’s). The provincial standards also include references to CSA standards.
Custom structures (those larger than specified in the standards mentioned above) are designed according to the Canadian Highway Bridge Design Code (CHBDC).