Metric Guides for Federal Construction
Published by the National Institute of Building Sciences (NIBS), www.nibs.org.
- Metric Guide for Federal Construction, 1991.
- Metric Design Guide (PBS-PQ260), General Services Administration, 1995.
These documents are guides prepared for federal government agencies and, as such, are what those agencies expect their A/E contractors to follow. They defines preferred units and standard degrees of precision, in the principal design disciplines, along with drawing practices. There is not much on specs — it would need to be supplemented for many subjects.