Tempered Glass Thermal Stress?

[courtnvm]

I have a canopy which has tempered glass panels and I am required to calculate the thermal stress of the panels based on an ambient temp of 120F and a surface temp of 180F. They are going to fabricate the panels using an outer lite of 1/4" tempered glass and an inner lite of 1/4" tempered glass with an inner layer consisting of 0.060 clear PVB. I was wondering if anyone could point me in the right direction for calculating these thermal stresses.

Thank you.

Val

Val Courtney, PE
Optimal Engineering, Inc.