HomeMy WebLinkAboutLETTER SCOPE OF WORKf a "~
%At4NED , PAUL WELCH INC.
BY Mechanical Electrical Civil Engineering
�$ " 1984 S.W. Biltmore St: Suite#114
I Port Saint Lucie, FL 34984
Phone (772) 785 - 9888
E-mail pwelchinc@aol.com
March 30, 2018
Re: Osborn Re -Roof
_ 10725 S Ocean Dr. 419
Jensen Beach, FL 34957
RECEIVED
MAR 3 0 2018
ST, 6uels County, Permitting
SCOPE -OF WORK:
Install new Metal Roof (Extreme Metal Fabricators, I.LC "5-V Crimp" FL #17022.1) at above
referenced address over new underlayment, and existing plywood sheathing.
i
DESIGN CRITERIA:
FBC 2017
ASCE7-10
PROJECT DATA:
BUILDING HIEGHT = 10'-0"
A= 3'
MEAN ROOF HIEGHT = <20'
ROOF ANGLE = 3:12
SHAPE = PITCHED GABLE
ADJUSTMENT FACTOR =1.00
IMPROTANCE FACTOR =1.00
WIND VELOCITY V ult = 165WH
WIND VELOCITY V asd = 128 MPH
EXPOSURE = D
ENCLOSURE CLASS = ENCLOSED BUILDING
INTERNAL PRESSURE COEFFICIENT = -0.18
FILE CODv
APPLIED UPLIFT DESIGN PRESSURES PER ASCE (PSF):
ZONE 1 (Field)— 40.3
ZONE 2 (Perimeter/ Ridge) = -68.0
ZONE 3 (Comers) = -99.8 Paul Welch Inc.
Paul Welch P.E. Reg. No. 29945
March 30, 2018
0725 S Ocean Dr. 419 Jensen Beach, FL
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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 (Corners): 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 OX.
UNDERLAYMENT:
Underlayment shall be in accordance with manufacturer's guidelines, FBC 1507.4.5.1, and FBC
15074322. Underlayment shall be 30# Roofing Felt.
DECIV tSTALLATION•
Re -nail all plywood sheathing (15/321, 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), manufacturer's
specifications, and the Florida Building Code 2017.
0725 S Ocean Dr. 419 Jensen Beach, FL
Paul Welch Inc.
Paul Welch P.E. Reg. No. . 29945
March 30, 2018
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