HomeMy WebLinkAboutEngineering PAUL WELCH INC.
Mechanical Electrical Civil Engineering
1984 S.W.Biltmore St. Suite#114
Port Saint Lucie,FL 34984
Phone(772)785 -9888
E-mail pwelchinc@aol.com
October 16,2015
Re: Residential Re-Roof
29 Los Lagos Rd.
Port St. Lucie,FL 34952
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
ASCE?-10
PROJECT DATA:
BUILDING HIEGHT=8'-0"
A 3'
MEAN ROOF HIEGHT=<20'
ROOF ANGLE=5:12
SHAPE=PITCHED GABLE
ADJUSTMENT FACTOR= 1.00
IMPROTANCE FACTOR= 1.00 ®@
WIND VELOCITY V uit= 160MPH
WIND VELOCITY V asd= 124 MPH �� � lk
EXPOSURE=C
ENCLOSURE CLASS=ENCLOSED BUILDING
INTERNAL PRESSURE COEFFICIENT=-0.18
APPLIED UPLIFT DESIGN PRESSURES PER ASCE(PSF):
ZONE 1 (Field)=-32.5
ZONE 2(Perimeter/Ridge)_-54.9
ZONE 3 (Comers)_-80.7 Paul Welch Inc.
Paul Welch RE. Reg. No. 29945
October 16,2015
29 Los Lagos Rd.Port St.Lucie,FL 1 of 3
METAL ROOFING ATTACHIIMNT REOUIREMENTS:
Metal roofing to be attached with corrosion resistant Hex-Head wood screws#9 z 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= 16"O.C.
Design uplift Pressure for attachment as per above:
Product Design Pressure: -86 PSF
Worst Case Applied Design Uplift Pressure : -80.7PSF
Therefore O.K.
UNDERLAYIVIENT:
Underlayment shall be in accordance with manufacturer's guidelines,FBC 1507.4.5.1, and FBC
15074.5.2.
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),manufacturer's
specifications, and the Florida Building Code 2014.
Paul Welch Inc.
Paul Welch P.E. Reg. No. 29945
October 16,2015
29 Los Lagos Rd.Port St.Lucie,FL 2 of 3
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Paul Welch inc.
Paul Welch P.E. Reg.No. 29945
October 16,2015
29 Los Lagos Rd.Port St.Lucie,FL 3 of 3