Greetings all. One one of our LEED projects, we're using the prescriptive approach of VLT*WFR falling within the range of 0.15 and 0.18. When the actual VLT of the glazing, 0.64 is used, VLT*WFR amounts to 0.32. However, the windows have a really large overhang. Is there a scientifically accepted method for adjusting the VLT to account for such an overhang (just like the ASHRAE projection factor method to adjust the SHGC for an overhang)?