Proper engineering and construction is critical to the integrity of your enclosure. Beam spacing and span must be calculated for the wind zone of the installation. Correct fastener size and spacing as well as diagonal "truss" bracing is critical for an enclosure to withstand high winds, ice and snow. At FunRooms we use computer stress analysis to verify all of our cages will withstand wind gusts of 140 mph; that is a category 4 hurricane!     
Why sceen enclosures fail