ASTM-C1691 › Complete Document History
Standard Specification for Unreinforced Autoclaved Aerated Concrete (AAC) Masonry Units

Complete Current Edition:
   2021 EDITION - Autoclaved Aerated Concrete (AAC) Masonry Units - Dec. 1, 2021

Obsolete Revision Information:
   2011 R17 EDITION - REAFFIRMED IN 2017 - Dec. 1, 2017
   2011 EDITION - Unreinforced Autoclaved Aerated Concrete (AAC) Masonry Units - Dec. 31, 2011
   2009 EDITION - Unreinforced Autoclaved Aerated Concrete (AAC) Masonry Units - July 1, 2009