lindab | rectangular S-bend Dimensions LBSR b f a Description 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 trapezoid corrugations. A special relationship is needed between the a-dimension, fall f and length l for the LBSR to retain its cross-sectional area and not restrict the air flow. For this reason, standard lengths and standard drops have been prepared. Ordering example Product Form side Curved side Fall Length LBSR 300 600 300 400 a b f l l l f a std std mm mm mm 100 400 300 150 400 300 200 400 300 250 400 300 300 500 300 350 500 300 400 600 400 450 600 400 500 600 400 600 700 400 700 800 500 800 900 500 900 1000 500 1000 1100 500 1100 1200 500 1200 1300 500 1300 1400 500 1400 1500 500 1500 1600 500 1600 1700 500 1800 1900 500 2000 2100 500 10 We reserve the right to make changes without prior notice
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