HomeMy WebLinkAboutMISC LETTERSENGINEERING
123 Wildcat Alley
Crawfordville, FL 32327
Phone: (561) 625-6455
Fax: (888) 788-2515
e-mail: terry®telunnpe.com
July 10, 2018
SCANNED
BY
St. Lucie County
St. Lucie County Building and Code Regulation Division
2300 Virginia Avenue
Fort Pierce, FL 34982
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RECEIVED
JUL 19 -'018
ST. Lucie County, Permitting
Re: McGraw Townhouses at 10175 S. Ocean Drive, Jenson Beach, FL.
To Whom It May Concern:
This letter is to state that the proposed tile roofing system is adequate for design wind loads on
the roof. The Santafe clay S the will be installed in accordance with Miami -Dade product
approval NOA 15-0915.09. The polyset adhesive being used is ICP Adhesives & Sealants
product approval FL6332-R8. The large 10" paddy is rated at 134 ft-lbs.
Based on the FBC 6w edition and ASCE 7-10 for wind speed of 170 mph with an exposure
category D, I calculated the design wind pressures on the components and cladding of the
roofing system, to be +29.8 psf for the entire roof and -45.1 psf for the field, -75.7 psf for the
perimeter and -112.9 psf for comers. The perimeter and comer pressures apply to a 5-foot wide
strip in from the building's exterior walls. The aerodynamic uplift moment on the file based on
the design pressures is 9.3 ft-lbs in the field,12.9 ft-lbs around the perimeter and 17.2 ft-lbs in
the corners. The design moments are well under the capacity of the system.
I certify to the best of my knowledge, belief and professional judgment that the described
roofing system is in accordance with the Florida Building Code 6th edition, 2017.
If I can be of further service, please advise.
Sincerely,
4
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