Labels:bulletin board | hakham | window OCR: Abuse and Impact New ASTM Specification! C1396 Now one ASTM Specifi ication number covers all gypsum board products ASTM 1396 IS single umbrella' standard for gypsum (covers C36 gypsum board; C79 gypsum sheathing; C630 water/moisture resistant backer board ASTM 1396 does not make any technical changes vater fechnical
