PERMIT DOCUMENTS /3 -o7q20
TURQUOISE Engineering, LLC
Structural Engineering, Design & Testing, CA #28948, NOA #13-0222.02
6915 Washington Rd,W Palm Beach, FL 33405/Ph. (561)804-9908/Fax(561) 804-9907/e-mail: turginc@aol.com
December 17, 2013
TO: City of Boynton Beach / Building Department
FROM: Riza N. ALTAN, P.E.
SUBJECT: In-Progress & Final Inspection of Flat Re-Roofing
ADDRESS: Boynton Center#5 Condo/401 E Ocean Ave., Boynton Bch, FL 33435
CONTRACTOR:Gustafson Industries / Roofing Division
PERMIT: #132970
Dear Sir:
The priming of existing concrete deck and installation of all hot-mop adhered roof
underlayments and cap sheet of the subject flat roof of the subject condominium
building has been inspected by myself during in-progress and final stages of its
re-roofing. The purpose of this letter is to verify the wind uplift pressures and installation
of all-adhered roof covering system.
The property takes place in Exposure C area and the mean roof height is 22 ft. The
existing (-44'x44') roof consists of structural concrete deck, having a minimum slope. As
per ASCE 7-10; 170 MPH ultimate wind speed for Risk Category II in Exposure C and Wind
Load Factor of 0.6 for ASD; the roof design pressures are determined as follows:
Field Pi: -44 psf / Perimeter (6' wide) P2: -74 psf / Corner (6'x6') P3: -111 psf
It is observed that CertainTeed Modified Bitumen Roofing System over Concrete Deck
(#FL2533-R9, Table 3B, Concrete Deck, Sys Type F, Non-Ins, Sys # C-72, pg. 29/46)
consisted of primed deck w/ Flint Prime SA, followed by all fully hot-mop-adhered
two-layers of Ultra Poly SMS ply sheets and FlintLastic GMS 170 cap sheet.
The max. design pressure of -240 psf exceeded the actual building pressures calculated
for each roof zone, including the corner pressures of -111 psf.
Therefore, this letter is to certify that installation of CertainTeed Modified Bitumen Roofing
System over Concrete Deck (#FL2533-R9) is completed conforming to requirements of
2010 Florida Building Code which specifies 170 MPH ultimate wind velocity for Risk
Category II in Exposure C area.
If you have any questions regarding this matter or I may be of further assistance, please
Ido not hesitate to call me.
wink•Ar
• '` NSincerely, �
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* . No.38821
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Riza N. ALTAN, 'P. . #38521
Consulting Engineer A•; STATE OF ;r
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