fire partition pjs solutions f120s f60s fermacell fire partitions acoustic walls jumbo stud walls fire resistant partitions 54db acoustic rating warehouse partitions partition wall dividing wall jumbo stud partitions built up to 20m high robust severe rated industrial partition system 62db acoustic rating robust severe rated industrial partition u-values 0.28 w/m2k system ref: f120s specified by architects f180s & f240s pjs solutions partition systems
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