Answer the following statements true (T) or false (F)
1. The greater is the thickness of a given material, the greater is its perm rating.
2. In warm climates, such as Climate zones 1 to 3, the vapor retarder may be omitted in wood or cold-formed steel (CFS) framed assemblies if the interior wall finish is a latex painted gypsum board.
3. Soffit vents alone are not adequate to provide attic ventilation.
4. In most materials, the safety margin for compressive stress and bending stress is the same.
1. False
2. True
3. True
4. False
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Problem 1.10 Link BD consists of a single bar 1 in. wide and 12 in. thick. Knowing that each pin has a 38 -in. diameter, determine the maximum value of the average normal stress in link BD if (a) ? = 0, (b) ? = 90°.
