HomeMy WebLinkAboutEngineering FILEcc)py -.a NOV 12 2015
PAUL WELCH INC.
Mechanical Electrical Civil Engineering
1984 S.W. Biltmore St. Suite#114
Port Saint Lucie,FL 34984
Phone(772)785 -9888
Email pwelchinc@aol.com
November 9, 2015
Re: Crawford Re-Roof
2808 Nine Iron Dr.
Port St. Lucie,FL 34952
SCOPE OF WORK:
Remove existing roofing and install new Standing Seam Metal Roof(Metal Sales Manufacturing
Corporation FL# 11560.4) at above referenced residence address over new underlayment and
existing plywood sheathing. (Flat Roof Not Included)
DESIGN CRITERIA:
FBC 2014
ASCE?-10
PROJECT DATA:
BUILDING HIEGHT=8'-0"
A=3'
MEAN ROOF HIEGHT=<12'
ROOF ANGLE=3:12
SHAPE=PITCHED GABLE
ROPROTANCE FACTOR= 1.00
WIND VELOCITY V ult= 160 MPH
WIND VELOCITY V asd= 124 MPH
EXPOSURE=C
ENCLOSURE CLASS=ENCLOSED BUILDING
INTERNAL PRESSURE COEFFICIENT=-0.18
APPLIED UPLIFT DESIGN PRESSURES ON SLOPED ROOF (usfl:
ZONE 1 (Field)=-31.9
ZONE 2 (Perimeter/Ridge)_-53.9
ZONE 3 (Comers)_-79.2
f
Paul Welch Inc.
Paul`Welch°P.E. Reg. No. 29945
_ November-9,2015
2808 Nine Iron Dr.Port St.Lucie,FL 34952 `-_ ,°� 1 of 3
ROOFING ATTACHMENT REOUHtEMENTS:
Metal roofing to be attached with#10- 12 x 1 1/z" long(minimum 1/4"penetration through
plywood sheathing)pancake head screws along the panel seam.
ALL ZONES :
Screws spaced at 24" on center along the seam of the panel.
Product Design Uplift Pressure: -84.25psf
79.2 < 84.25 Therefore O.K.
UNDERLAYMENT•
Underlayment shall be TRI-BUILT Roofing Products(Tri-Built S/A HT TU Underlayment)
FL# 16048.1 Priming deck is optional although recommended. Apply sheet parallel to the roof
edge. Adhere the exposed part to the substrate,firmly roll the membrane into place to acheve a
bond. Horizontal seams shall have minimum 3"lap,vertical seams shall have minimum 6"lap
and staggered not less than 24"from vertical laps below. All over-granule end laps shall be
sealed using heat-weld or hot air welding techniques. Tri-Built S/A HT TU Underlayment shall
be installed in compliance with the requirements for ASTM D1970 underlayment in FBC
Section 1507.
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# 11560.4), (FL# 16048.1),
manufacturer's specifications, and the Florida Building Code 2014.
Paul Welch Inc.
Paul=Welch-P;E. Reg:-,N6.,29945
Noveriiber;_9,-2015.
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2808 Nine Iron Dr.Port St.Lucie,FL 34952 Q 2 of 3
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ROOF ZONE PLAN
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ZONEDESIGNA770N(TYPICAL)
Paul Welch Inc.s
c Paul Welch P.E::Rcg.No 29945
November'9 -2015
2808 Nine Iron Dr.Port St.Lucie,FL 349520° -�3 of 3