ò Underwriters Laboratories
á - Some FR chemicals are UL
áááá registered components
á - UL inspects both chemical
plant and
áááá treating plant
production
òáTimber Products Inspection
á - Inspects the treating plant
production
òáFactory Mutual Corporation
á - Some FR chemical manufacturers
are
ááá audited annually to comply
with theirá
ááá listing with Factory Mutual
for a class 1
ááá roof decking material.