Trellis Wind Load

Structural Engineering general discussion Constructed Items
#1

I have a 30 ft. x 30 ft. trellis with perimeter HSS beams and two intermediate HSS or I-beams to break the 2x10 rafters into 10 ft. spans. For wind perp. to the rafters, does anyone have any info on the wind shading from rafter to rafter? I found an old post from 2006 in Eng Tips that states anything within 4d spacing is considered shaded. Not references were cited, however.

Thanks.

(This is cross posted to Eng Tips)

#2

@XR250…generally, shading is not considered. Some codes specifically precluded use of shading.

#3

Always tricky when designing the top floor of a parking garage…

Dik