Porosity of shade cloth
Porosity of shade cloth
(OP)
I am looking at shaded car ports. The structure comprises a rigid metal frame with a fabric roof. the fabric roof is considered a tensile structure and connected to the steel frame at discrete points.
The designer claims the wind force coefficient can be reduced due to the openings in the weave of the fabric. The proposed reduction is 50 %.
We cannot accept this large reduction and consider the factors should remain as stated in the code, especially when one considers the fabric when wet
Has anyone come across any literature or research dealing specifically with wind action on fabric
The designer claims the wind force coefficient can be reduced due to the openings in the weave of the fabric. The proposed reduction is 50 %.
We cannot accept this large reduction and consider the factors should remain as stated in the code, especially when one considers the fabric when wet
Has anyone come across any literature or research dealing specifically with wind action on fabric






RE: Porosity of shade cloth
RE: Porosity of shade cloth
I had an Aerospace Engineer once state that a single wire cable on an old biplane produces as much drag as a full wing.
RE: Porosity of shade cloth
I've done some designs where I was able to justify reducing the calculated wind load by 50% for mesh type fabric shade. You have to find out what the actual fabric shade will be to make an engineering decision if a reduction is appropriate or not.
RE: Porosity of shade cloth
It would seem that the prudent approach would be to reject the reduction in load unless it can be substantiated with reviewed published research
RE: Porosity of shade cloth