HomeMy WebLinkAboutEngineering RECEIVED N 0V 01 2016
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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 25,2016
Re: Desautels Re-Roof
380 Nettles Blvd
Jensen Beach,FL
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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.
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DESIGN CRITERIA:
FBC 2014
ASCE?-10
PROJECT DATA:
BUILDING HIEGHIT=20'
A=3'
MEAN ROOF HIEGHT=<25'
ROOF ANGLE=4:12
SHAPE=PITCHED HIP
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) =-43.1
ZONE 2 (Perimeter/Ridge) _-75.1
ZONE 3 (Corners) _-111.0 ,, - = Paul Welch Inc.
..'P94ff�Nelch P.E.Reg.No. 29945
;`October 25,2016
380 Nettles Blvd Jensen Beach,FL _ 1 of 3
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METAL ROOFING ATTACHMENT REQUIREMENTS:
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=6" O.C.
Design uplift Pressure for attachment as per above:
Product Design Pressure:Zones 1 &2 : -93.5PSF/Zone 3: -228PSF
Therefore O.K.
UNDERLAYMENT:
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 25,2016
380 Nettles Blvd Jensen Beach,FL '{. 2 of 3
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- Paul Welch Inc.
WeTcY�P.E.Reg.No. 29945
October 25,2016
380 Nettles Blvd Jensen Beach,FL f'`�, �`J t i,, �� \ 3 of 3