What is the only evaluation body designated in the Building Code?

The correct answer is the Canadian Construction Materials Centre (CCMC) because it is the only evaluation body specifically designated in the Ontario Building Code. The CCMC is responsible for assessing and evaluating construction materials, systems, and products to ensure they meet the standards set forth in the Building Code.

This evaluation process is crucial as it helps maintain safety, health, and structural integrity in buildings across Ontario. The CCMC typically conducts thorough testing and research, issuing reports that guide builders and designers in selecting appropriate materials compliant with building regulations.

The other options, while related to construction and building practices, do not fulfill the official role of an evaluation body within the context of the Ontario Building Code. The Ontario Building Commission focuses more on policy and administration rather than evaluations, the National Association of Home Builders is not a regulatory body within Canada, and the Public Works Department generally deals with public infrastructure rather than material evaluation. Thus, the CCMC's unique position makes it the sole evaluation entity referenced in the Building Code.