The performance grade (PG) of a window gives the permissible design wind load on the window. For instance, PG30 means that the design wind load on the window is 30 psf. What is the safety factor required in the window's resistance to wind load? Explain.

What will be an ideal response?


Safety factor of 1.5 is built into the window's resistance to wind load, i.e., a window rated as PG30 must be able to
resist a wind load = 30(1.5) = 45 psf.

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