HomeMy WebLinkAboutENGINEERING LETTERPAUL 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
May 10, 2019
SCANNED
Re: Fugazzoto Re -Roof BY
10701 S Ocean Dr. #728 St. Lucie County
Jensen Beach, FL 34957
RECEIVED
MAY 2 0 1019
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SCOPE OF WORK:
Install new Metal Roof (Extreme Metal Fabricators, LLC "5-V Crimp" FL #17022.1) at the
above referenced address over new underlayment, and existing plywood sheathing.
DESIGN CRITERIA:
FBC 2017
ASCE7-10
PROJECT DATA:
BUILDING HIEGHT = I V-0"
A= 3'
MEAN ROOF HIEGHT = <15'
ROOF ANGLE = 3:12
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 (Comers) = -99.8 Paul Welch Inc.
Paul Welch P.E. Reg. No. 29945
May 10, 2019
AAl
10701 S Ocean Dr. #728 Jensen Beach, FL ✓ 1 of 3
Metal roofing to be attached with corrosion resistant Hex -Head wood screws #10 x 1 %z"
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.
Paul Welch Inc.
Paul Welch P.E. Reg. No. 29945
May 10, 2019
10701 S Ocean Dr. #728 Jensen Beach, FL / 2 of 3
Ll
ROOF ZONE PLAN
A=3 ,
1QQ2 , 3Q= ZONE DESIGNA770N (MICAL)
NOTE: PROVIDE LAP SEALANT FOR ALL ROOF PANEL LAPS FOR ROOF
SLOPES UNDER 3 VERT.:12 HOR7,
Paul Welch Inc.
P ul Welch P.E. Reg. No. 29945
May 10, 2019
10701 S Ocean Dr. #728 Jensen Beach, FL 3 of 3