Building design starts with a concept, a sketch at a macro scale. At the first stroke of the designer's hand, there is no concern for concrete strength, nor concrete as a building material. The initial sketch may be a simple massing study to determine..
You've seen them. You've been required to comply with them. You've been required to implement them. You may have written them.
David Bishton, RA, CSI, CCS, CCCA, as Southwest Region CSI Editor, asks: "But how the heck does a contractor or supplier or installer of materials know what the intent is when they are bidding or building a project, unless it is carefully explained?"
Collecting basis of design product data before starting the project specifications takes time. It takes even more time to get the right information. From the specifier's perspective, data gathering is often an art form rather than a defined process...