HomeMy WebLinkAboutEngineering RECEIVED NOV 10 2016
PAUL WELCH INC.
Mechanical Electrical Civil Engineering
0 1984 S.W. Biltmore St. Suite#114
Port Saint Lucie,FL 34984
Phone(772) 785 - 9888
p� E-mail pwelchinc@aol.com
November 10, 2016
'Re: Rollins Re-Roof
10851 S Ocean Dr. #27
Jensen Beach, FL 34957
SCOPE OF WORK:
Install new Metal Roof(Extreme Metal Fabricators, LLC "5-V Crimp"FL#17022.1)at above
referenced address over new underlayment, and existing plywood sheathing.
DESIGN CRITERIA:
FBC 2014
ASCE7-10
PROJECT DATA:
BUILDING HIEGHT= 10'-0"
A=3'
MEAN ROOF HIEGHT=<20'
'ROOF ANGLE=2:12
SHAPE=PITCHED GABLE
ADJUSTMENT FACTOR= 1.00
IMPROTANCE FACTOR= 1.00
WIND VELOCITY V ult= 165MPH
WIND VELOCITY V asd= 128 MPH
EXPOSURE=D
ENCLOSURE CLASS =ENCLOSED BUILDING
INTERNAL PRESSURE COEFFICIENT=-0.18
APPLIED UPLIFT DESIGN PRESSURES PER ASCE(PSF):
ZONE 1 (Field)=-40.3
ZONE 2 (Perimeter/Ridge)_-68.0
ZONE 3 (Corners)_-99.8 Paul Welch Inc.
Paul Wel&P-E Reg:-N- 29945
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`2016'
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10851 Ocean Dr.#27 Jensen Beach,FL �' 1 O,o3
METAL ROOFING ATTACHMENT REOUIREMENTS:
Metal roofing to be attached with corrosion resistant Hex-Head wood screws#10 x 1
minimum with weather sealing washers(minimum 3/16"penetration through deck). Fasteners
shall be placed through the panel ribs at 12"on center across panel width and spacing along the
ribs as follows:
.ZONE 1 (Field):FASTENER SPACING= 16" O.C.
ZONE 2 (Perimeter/Ridge): FASTENER SPACING= 16"O.C.
ZONE 3 (Comers): FASTENER SPACING=8" O.C.
NOTE: PROVIDE LAP SEALANT FOR ALL ROOF PANEL LAPS FOR ROOF
SLOPES UNDER 3 VERT. :12 HORZ.
Design uplift Pressure for attachment as per above:
Product Design Pressure:Zones 1 &2: -93.5PSF/Zone 3: -101PSF
Therefore O.K.
UNDERLAYMENT•
Underlayment shall be in accordance with manufacturer's guidelines, FBC 1507.4.5.1,and FBC
15074.5.2. Underlayment shall be Approved 30#Roofing Felt or UDL 25 plus NOA# 13-
0730.01.
DECK INSTALLATION:
Re-nail all plywood sheathing(15/32"thick minimum)with 8D ring-shank nails at 4"O.C.
perimeter and 6" O.C. field for all zones.
All work to be in compliance with product approval (FL# 17022.1), (NOA# 13-0730.01.),
manufacturer's specifications,and the Florida Building Code 2014.
Paul Welch Inc.
Paul-Welch P.E.-'Reg.No.29945
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10851 Ocean Dr.#27 Jensen Beach,FL
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ROOF ZONE PLAN
A=3'
ZONE DESIGNATION(TYPICAL)
NOTE: PROVIDE LAP SEALANT FOR ALL ROOF PANEL LAPS FOR ROOF
SLOPES UNDER 3 VERT. :12 HORZ.
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Paul W�lch,�F'E"Reg�o;29945
10851 Ocean Dr.#27 Jensen Beach,FL