You’ve Been Measuring Wrong! The Secret Tuff Rib Dimensions Every Pro Uses

The tuff rib panels should be no longer than 25 to minimize the effect of metal expansion and contraction. This length is also easier to handle during installation. In situations where longer lengths are required, the ends will be overlapped. On roofs, the distance of end overlap varies with the amount of slope. Tuff rib and/or diamond rib (wall steel) metal installation manual 36 panels note:

Extremely versatile, they are suitable for homes and businesses as well as agricultural and utility buildings. Ixx and sxx are effective section properties for deflection and bending. Measure 3 parallel on the eave line and place another nail shown here as b. Just make sure that you multiply all measurements by the same number.