These tapers are commonly seen in ductwork systems. They are simple in that they only reduce in size in one dimension. On a symmetrical taper this means two of the four sides are flat. Unless requested otherwise the length of each taper will be determined by the slope angle; ductwork specification DW144 stipulates a slope angle of no more than 22.5°. We fabricate them with a slope angle between 20° and 22.5°.
Note that rectangular ductwork is made to order. Please therefore take manufacturing time into account when scheduling your project.
Use the drop down menu to select your required width in. 'Depth in', and 'width out' can be selected on the following page.