SC Glass And Glazing Practice Questions - South Carolina Glass And Glazing Contractor Examination Exam

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Why do insulating-glass manufacturers often size the secondary silicone seal of an IGU used in structural glazing for only about half of the design wind load?

Because the inboard and outboard lites are assumed to share wind load about equally, so each edge seal sees about half the pressure Because structural silicone is only rated at 10 psi in every specification Because the metal pressure plate carries the other 90 percent Because IG secondary seals are never allowed in SSG

Correct Answer:

Because the inboard and outboard lites are assumed to share wind load about equally, so each edge seal sees about half the pressure

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