Fixed Width Duct Support

  • Material is 1-5/8″ [41.3] wide x 1/4″ [6.3] thick unless specified.
  • Holes are 9/16″ [14.3] diameter, 13/16″ [20.6] center to edge on 1-7/8″ [47.6] centers unless specified


Duct Support With Fixed Width & Adjustable Height With 1-5/8” (41mm) Pre-Galv or Hot Dip Galv Steel Channel
Part No.No. of BasesHeightWidthBase LengthWeight
Lbs (Kg)
Uniform Load*
Lbs (Kg)
RSB4232416FWDSPG423”24″25”37.5 (17.01200 (5.3)
RSB4233616FWDSPG423”36″25”39.3(17.8)750 (3.3)
RSB4234816FWDSPG423”48″25”41.1(18.6)550 (2.4)
RSB4292416FWDSPG429”24″25”39.4(17.9)1200 (5.3)
RSB4293616FWDSPG429”36″2541.2(18.7)750 (3.3)
RSB4294816FWDSPG429”48″25”43 (19.5)550 (2.4)
RSB4 412416FWDSPG441”24″25”43.2(19.6)1200 (5.3)
RSB4 413616FWDSPG441”36″25”45 (20.4)750 (3.3)
RSB4 414816FWDSPG441”48″25”46.8(21.2)550 (2.4)
RSB6 531816FWDSPG653”18″37”57.8(26.2)1600(7.11)
RSB6 532416FWDSPG653”24″37”58.7(26.6)1200 (5.3)
RSB6 533616FWDSPG653”36″3760.5(27.4)750 (3.3)
RSB6 534816FWDSPG653”48″37”62.3(28.3)550 (2.4)
* This load is only for the capacity of the components in this assembly. Please consult roofing manufacturer or engineer for roof load capacity.




Finish – Fitting: PG – Pre-galvanized Zinc
ASTM A653 G-90 Pre-galvanized zinc is produced by continuously rolling steel coils or sheets through molten zinc at the mills. The coils or sheets are slit to size and fabricated by forming, shearing or punching to produce the finished product. During fabrication cut edges are not generally zinc coated; however, the zinc near the uncoated metal becomes a sacrificial anode to protect the bare areas.

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and which is known to cause birth defects or other reproductive harm. For more information go to