HomeMy WebLinkAboutEngineering r
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
January 17,2017
Re: Withers Rel Roof
741 Nettles Blvd.
Jensen Beach, FL 34957
a
j
SCOPE OF WOUK:
Install new Metal Roof(Extreme Metal Fabricators,LLC "5-V Crimp"FL#17022.1)at above
referenced addressl over new underlayment, and existing plywood sheathing.
DESIGN CRITERIA:
FBC 2014 j a
ASCE?-10
PROJECT DATA:
BUILDING HIEGHT= 10'-0"
A=3'
MEAN ROOF HIEGHT=<15'
ROOF ANGLE=4:12
SHAPE=PITCHED GABLE
ADJUSTMENT FACTOR= 1.00
RVIPROTANCE 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)_X40.3
ZONE 2 (Perimeter/Ridge)_-68.0
ZONE 3 (Corners) -99.8Paul Welch Inc.
Plaul Welch P.E. Reg.No. 29945
January 17, 2017
a
741 Nettles Blvd Jensen Beach,FL 1 6f3
i
I
I
I
METAL ROOFING ATTACHMENT REOUIREMENTS:
Metal roofing to be attached with corrosion resistant Hex-Head(wood screws,#10 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=8" O.C.
NOTE:PROVIDE LAP SEALANT FOR ALL ROOF PANEL LAPS FOR ROOF
SLOPES UNDER13 VERT. :12 HORZ.
i
Design uplift Pressure for attachment as per above:
Product Design Pressure: Zones 1 &2: 93.5PSF/Zone 3: -101PSF
Therefore O.K.
I
UNDERLAYMENT:
Underlayment shall be in accordance with manufacturer's guidelines, FBC 1507.4.5.1, and FBC
15074.5.2.Underlayment shall be Tri-Built underlayment NOA# 15-1123.06.
DECK INSTALLATION:
Re-nail all plywood sheathing(15/32"thick minimum)with 8D ring-shank nails at 4"O.C.
perimeter and 6" 6,C. field for all zones.
All work to be in compliance with product approval (FL# 17022.1), (NOA#i 15-1123.06.),
manufacturer s specifications, and the Florida.Building Code 2014.
N
Paul Welch Inc.
Paul Welch P.E. Reg.No.29945
January 17,2017
741 Nettles Blvd Jensen Beach,FL 2.6f 3
i
i
._............. .- ---- - - - - -
I p '
i •
N S LO Pr
i� i �lLd ti I �l i( �y
i
► il Ij
A A •A A
ROOF ZONE PLAN
'A=3'
ZONE DESIGNATION(TYPICAL)
NOTE: PROVIDE LAP SEALANT FOR ALL ROOF PANEL LAPS FOR ROOF
SLOPES UNDER13 VERT. :12 HORZ.
i .
Paul Welch Inc.
Paul Welch P:E. Reg.No. 29945
January.l7, 2017
741 Nettles Blvd Jensen Beach,FL 3 of 3
i