HomeMy WebLinkAboutEngineering 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
May 12, 2016
TO: Port St Lucie County/ Building Department
FROM: Riza N. ALTAN, P.E.
SUBJECT: Installation of New Snap-Lock Metal Panels
ADDRESS: ANDREWS Residence /461 Naranja Av., Port c'e 49
CONTRACTOR: Larry Neese LLC, Roofing &Waterproofing ),Q' ,_-V7
JUN 0 12016
PER"AITri NG
Dear Sir: St. Lucie county, FL
The roof of subject residence is proposed to be covered with Metal Sales "Image II"
V-high rib Snap-on Standing Seam panels.
The existing roof has gable configuration, 3/12 slope and 15 ft roof mean height. The
property is located in Exposure C area. As per 2014 Florida Building Code, ASCE 7-10,
160 MPH ultimate wind velocity for Risk Category II in Exposure C area, using Wind
Load Factor of 0.6 for ASD; the wind pressures are determined as follows:
Field: Pi = - 32 psf/ Perimeter (4'wide): P2 = - 54 psf / Corner (5'x5'): P3 = -80 psf
According to 16"wide, Image II 26 Ga., Snap-On (#FL14645.11-R2) 1"-High Rib Standing
Seam Metal Roof Panels over the existing plywood deck, the design uplift pressure of-63.5
psf is achieved by fastening the panel seams, for field (Pi)and perimeter (P2) at 6" o.c.
row spacing.
In the corner (P3) zones the -86.55 psf uplift resistance will be achieved by using
continuous 3/8% wide bead of Permathane Schnee-Morehead SM7108 Sidelap
adhesive, in addition to #10 pancake head screws spaced at 6" o.c. row spacing.
Fasteners shall be of sufficient length to penetrate through the deck a minimum of 1/4".
The metal panels will be installed over InterWrap Titanium SA (FL11602) underlayment
applied direct to deck.
Therefore, this letter is to certify that the installation of Metal Sales, Image II
(#FL14645.11-R2) 1"-High Rib metal roof panels conform to requirements of 2014 FL
Bldg Code which specifies 160 MPH ultimate wind speed for Risk Category II in
Exposure C area.
If you have any questions regarding this matter or I may be of further assistance, please
do not hesitate to call me.
Sincerely, �.. >: ��,�� N. Air le
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Riza N. ALTAN, P.E. 852.1
Consulting Engineer ineer srAr�of e
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