What is the recommended length to order for an ogee (radius) offset if a duct width is 12" and requires a 5" offset?

To determine the recommended length to order for an ogee (radius) offset, it is crucial to consider the dimensions involved, specifically the width of the duct and the required offset.

In this situation, with a duct width of 12 inches and a desired offset of 5 inches, the calculation for the ogee offset length involves understanding the geometry of the offset. The ogee offset includes the width of the duct, plus additional material needed for the bend radius or curvature. In practice, the radius of the bend can alter the total length needed for the offset as it involves not just the straight sections, but also the curvature.

Most guidelines suggest adding the width of the duct to twice the radius of the offset to adequately account for the material required for effective bends. The recommended formula for calculating the total length for the ogee offset generally derives from these geometric considerations.

Given that the duct is 12 inches wide, and we effectively need to add a reasonable allowance for the radius of the bends required by creating the offset, which in this case is approximated to equal to the dimension provided. Thus, when you add both the width of the duct and the offset dimensions, the result aligns closely with 17 inches.

This figure appropriately accounts for the necessary