Type FSW wallboard

[Marc M]

Any of you come across type FSW wallboard. In this application it was used in/as a separation wall.

[William Kievit]

Can't say I've seen it. Here are some links.
National Gypsum Fire Shield
http://www.nationalgypsum.com/literature/fullbrochure.pdf
http://www.gypsum.org/pdf/GA-605-08-08.pdf