TABLE OF CONTENTS Why is purlin bracing required?
Select a preliminary size of continuous purlins spanning 25 ft and supporting the roof live load of 20 psf and the collateral load of 5 psf. Assume the dead load of purlins and roofing is 2 psf. The maximum vertical deflection should not exceed L/240. Use LGSI Z sections.
Name two methods of bracing the interior flange of cold-formed girts.
What are the three roles of the eave member?
Explain the concept of effective design width in cold-formed sections.
List three methods of increasing flexural capacity of purlins in the end spans. Why might it be needed?
What does the base test measure?
What is the function of antiroll clips? What is purlin roll?
Can the standing-seam roofing with concealed clips be considered lateral bracing for open-web joists? If yes, why? If not, what can be?
Explain the difference between a wind column and a wind post.
