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Used for deflections of the duct system, for example where ducts cross.

Has a joining profile type RJFP at both ends, and is stiffened by corrugations.

A special relationship is needed between the a-dimension, fall f and length l for the LBSRSS to retain its cross-sectional area and not restrict the air flow. For this reason, standard lengths and standard drops have been prepared.

The product is CE marked according to EN 12101-7 and used in a rectangular smoke control system - single compartment (see declaration of performance).