| (Unregistered Guest)|
|Posted on Wednesday, July 14, 2004 - 04:12 pm: |
Is "Type C" the same as, or equivalent to, "Special Type X" gypsum board? Are both designations generic? Thanks.
|David R Combs, CSI, CCS, CCCA (Unregistered Guest)
|Posted on Thursday, July 15, 2004 - 09:27 am: |
Refer to United States Gypsum, Brochure SA927.
Basically, there are three types:
"Firecode Core" (Type X) having additional fire resistance, and
"Firecode C Core" (improved fire resistance over Type X).
ASTM C 36 only recognizes regular and Type X. From that I pressume Firecode C to be manufacturer-specific, and not necessarily generic or common to all manufacturers.
Hopefully, others will chime in if I have misunderstood the information.
|John Bunzick, CCS, CCCA
Post Number: 235
|Posted on Thursday, July 15, 2004 - 09:33 am: |
1/2 inch thick Type C has also been tested in some assemblies in lieu of 5/8 Type X. However, remember that in order to achieve a fire rated partition, the products and materials must be as listed in the assembly used. That is, I would not substitute Type C for Type X unless the assembly permits it.