The new American Concrete Institute (ACI) 301-20, Specifications for Concrete Construction, provides the latest construction practices and concrete-related material information necessary for today’s contract documents.
As manufacturers introduce materials with new properties and attempt to push the boundaries of building envelope construction, it is crucial the industry agrees on terminology for communicating the specific functions and purpose of these materials to avoid confusion and costly errors. In this regard, the term ‘air/vapor barrier’ is misleading and should be replaced with more appropriate terminology.
Proprietary specifying is when construction specifications indicate product requirements by naming specific manufacturers and, perhaps, products. Often more than one specifying method—sometimes all four—are used in the same specifications section.
More than ever, it has become the responsibility of specification writers to ensure curtain wall products’ performance, testing, and installations are defined IN ORDER to meet project requirements. A properly installed, field-assembled stock length curtain wall can meet industry leading performance standards, and support continued construction challenges with regard to availability of qualified labor, as well as fast-track project schedules.