Duct Dimensions lindab | rectangular LKR b L a Description Straight duct, stiffened with transverse trapezoid corruga- tions, which reduces the risk of noise generation. Larger dimensions have stiffening profiles and/or internal rods. Installation height of these profiles is 23 mm. Ducts are normally supplied with a strong joining profile RJFPC3 20, RJFPC3 30 or RJFPC3 40 at each end, but can also be supplied as a flexible piece, where the joining profile on one end is not fixed. Also available with an end cover fixed by joining profiles. Ordering example LKR 500 300 1500 1 Product Largest side a Smallest side b Length L RJFP3C-joint at both ends 1 RJFP3C-joint at one end 2 Loose joint included. RJFP3C-joint at one end 3 End cover on joining profiles at other end. End cover on joining profiles at 4 both ends. RJFP3C-joint at one end 5 No loose joint included. Lindab reserves the right to make changes without prior notice 1 2020-08-17
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