You might also be interested in this, posted here yesterday
https://www.dni.gov/files/NCSC/documents/Regulations/Technical-Specifications-SCIF-Construction.pdf
National Counterintelligence and Security Center
Technical Specifications for Construction and
Management of Sensitive Compartmented
Information Facilities
VERSION 1.4
IC Tech Spec – for ICD/ICS 705
An Intelligence Community Technical Specification
Prepared by the
National Counterintelligence and Security Center
September 28, 2017