we have constructed an sign 4' x 8'. How can we provide the wind load for a permit?
The sign is 4' x 8'. The sign is made of 2' x 6' treated lumber, for the frame, and 2 sheets of Royal Mouldings Limited PVC Board (4' x 8' ft. sheets), for the substrate. The sign is connected together with 3 inch decking screws and construction adhesive. The sign will be mount between 2 6' x 4' treated post cemented into the ground. Because we constructed the sign ourselves the county is asking for wind load proof of 90 mph for a permit to be issued. How can we show our signs wind load?