I have an unfinished detached two-story garage that is about 20' x 24'. Before I start putting on the make-up and lipstick I want to (if possible) make improvements to the structure beyond the basic building code safety requirements. I believe the current local building code requires 3-second gust at 90 mph.
My goal is to make the structure resistant to an EF-2 tornado (3-second gust 135 mph).
It would seem that by now, "Wind-Resistant Construction" should be more common knowledge and less of a specialty field. New code requirements in Florida and costal communities require and promote more Wind-resilient structures which saves cost to the everyone in the long run.
There is a Simpson Strong-Tie Technical Bulletin titled, "Strengthening Dwellings in Tornado-Prone Areas".
F-C-HWRCAG16 is a 80-page, color application guide discussing the critical elements of high wind-resistant construction and includes information on the effects of wind, corrosion and uplift, and provides detailed product information for construction in high-wind areas.
I did see a Simpson Strong-Tie Strong-Rod uplift Restraint System on page 47 of the catalog. This looks like a doable retrofit if it will meet the EF-2 requirement. Is there a way to determine if these will work for my application?
The Simpson Strong-Tie® Strong-RodTM Uplift Restraint System for roofs (Strong-Rod URS) is a continuous rod tie down solution designed to provide a complete load path to resist suction (uplift) pressure on the roof. After hurricane ties transfer roof uplift forces into the uppermost top plates in a wood-frame structure, a Strong-Rod URS continues to transmit that resistance down to the foundation or final termination point. Visit www.strongtie.com/srs for more information.