Glass Block

[BrentM.Adams36]

I need a little clarification on the use of glass block in fire-rated assemblies. Back when I started in code enforcment under the UBC, my building official told me that fire-rated glass block was not allowed as an opening protection in fire-rated assemblies (other than on some atrium applications). He said the reason why is because there are no approved tested assemblies using glass block and that while glass block might have a rating, the mortar didn't.

Now it appears that as of the 2003 IBC, glass block is allowed in some fire barriers and partitions rated 1-hour or less (Section 2110.1.1). My question is this: if one is using glass block in a rated wall, is there an assembly design that needs to be followed, or can it just be put together in any manner using block and mortar?

 

[mark handler]

Welcome to the group

Check out this discussion
http://discus.4specs.com/discus/messages/3062/2366.html?1144184520

 

[Builder Bob]

The installation has to be per UL and Manufacture's installation guide - so to answer your question - just any manner of installation does not work. Went to an office building once that had been remodeled without permits - fire rated glass blocking was in the corridor - the UL and manufactures guide indicated that the glass blocking could only be three feet tall, and bottom header track had to be no more than 36" off of the floor - the bottom header track was 37" off of the floor and failed the inspection - contractor had to tear out every bit of glass block and reinstall the glass blocking for the owner - plus was reported to state contractor license board , payed double permit fees, and was fined.