HomeMy WebLinkAboutLETTER FROM PAUL WELCH"F
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
February 11, 2019
Re: Hansen Re -Roof
10725 S Ocean Dr. 214
Jensen Beach' 34957
SCANNED
BY
St. Lucie County
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 CRPI'ERIA•
FBC 2017
ASCE7-10
PROJECT DATA:
BUILDING HIEGHT=12'-0"
A= 3'
MEAN ROOF HIEGHT = <23'
ROOF ANGLE = 5:12
SHAPE = PITCHED GABLE
ADJUSTMENT FACTOR = 1.00
IMPROTANCE FACTOR = 1.00 I D� • O t7
WIND VELOCITY V ult = 165MPH
WIND VELOCITY V asd =128 MPH
EXPOSURE E D FILE COPY
ENCLOSURE CLASS =ENCLOSED BUILDING
INTERNAL PRESSURE COEFFICIENT = -0.18
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
February 11, 2019
10725 S Ocean Dr. 214 Jensen Beach, FL 1 of 3
Metal roofing to be attached with corrosion resistant Hex -Head wood screws #10 x 1 V?
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 30# Roofing Felt.
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 2017.
10725 S Ocean Dr. 214 Jensen Beach, FL
_ Paul Welch Inc.
Paul Welch P.E. Reg. No. 29945
February 11, 2019
2of3'
0
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ROOF ZONE PLAN
A=3'
01 ,M = ZONE DESIGNAMN (TYPICAL)
NOTE: PROVIDE LAP SEALANT FOR ALL ROOF PANEL LAPS FOR ROOF
SLOPES UNDER 3 VERT.:12 HORZ.
Paul Welch Inc.
Paul Welch P.E. Reg. No. 29945
/ February 11, 2019
10725 S Ocean Dr. 214 Jensen Beach, FL 3 of 3