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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
Email pwelchinc@aol.com
January 24,2017
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Re: Humphreys Re-Roof
10725 S. Ocean Drive Lot 145
Jensen Beach,FL 34957
SCOPE OF WORK:
Remove existing roofing and install new 5-V Crimp Metal Roof(Gulf CoastiSupply&
Manufacturing FL# 11651.13) at above referenced residence address over new underlayment
and existing plywood sheathing.
DESIGN CRITERIA:
FBC 2014
ASCE?-10
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PROJECT DATA:
BUILDING HIEGHT= 10'
A=3'
MEAN ROOF HIEGHT=<15' j
ROOF ANGLE=3:12
SHAPE=PITCHED GABLE
INTROTANCE FACTOR= 1.00
WIND VELOCITY V uit= 165 MPH
WIND VELOCITY V asd= 124 MPH
EXPOSURE=D
ENCLOSURE CLASS=ENCLOSED BUILDING
INTERNAL PRESSURE COEFFICIENT=-0.18
APPLIED UPLIFT DESIGN PRESSURES ON SLOPED ROOF (nsfl:'
ZONE 1 (Field)=-44.7
ZONE 2(Perimeter/Ridge) _-75.5
ZONE 3 (Corners) _-110.8
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Paul Welch Inc.
Paul Welch P:E. Reg.No.29945
January 24,2017
10725 S.Ocean Drive Lot 145 Jensen Beach,FL 34957 1 of 4
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METAL ROOFING ATTACHMENT REOUIREMENTS:
Metal roofing to be attached with#9- 15 x 1 Y2"long(minimum V4"penetration through
plywood sheathing)Woodgrip screws with weather sealing washers spacing as follows:
ALL FASTENERS IN THE FLAT OF THE PANEL
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ZONE 1 (Field):
Fasteners adjacent to ribs one side(Type 1 per product approval) at 16",O.C.
ZONE 2:(Perimeter/Ridge):
Fasteners adjacent to ribs one side(Type 1 per product approval) at 16" O.C.
ZONE 3 (Corners):
Fasteners adjacent to ribs both side (Type 2 per product approval),at 16" O.C.
Zones 1 &2 Design uplift Pressure: -94.25 psf
Zone 3 Design uplift Pressure: - 131.0 psf
Zones 1 &2: 94.25>75.5 >44.7 Therefore O.K.
Zone 3: 131.0> 110.8 Therefore O.K.
NOTE: CONTINUOUS APPROVED LAP SEALANT MUST BE,USED AT ALL PANEL
SIDELAPS FOR SLOPES LESS THAN 3:12.
UNDERLAYMENT: I
Underlayment shall be Tri-Built Roofing Products FL# 16048.1 "Tri-Built S/A HT TU".
While priming is optional,TRI-BUILT recommends priming the deck if the final roof cover is
not slated for installation within 24 hours.
Apply sheet parallel to the roof edge. Roll out approximately 10 ft of membrane and peel back .
the first 3 ft of release film.
Adhere the exposed part to the substrate and unroll the remaining membrane as far as possible.
Once the entire length of membrane is in place,peel-off the release film diagonally while
holding the membrane tight. Firmly roll the membrane into place to achieve.a bond. Horizontal
seams should be minimum 3-inches, configured to shed water.Vertical seams should be 6inches
and staggered not less than 2-ft from vertical seams in the course below. All,over-granule end-
laps shall be sealed using either heat-welding or hot air welding techniques.For Valleys and
Ridges: Cut underlayment into 4 to 6 foot lengths.Peel the release paper and center sheet over
valley or ridge. Drape and press sheet into place,working from the center of the valley or ridge
in each direction. For valleys, apply the sheet starting at the lowest point and work upward.
Paul Welch Inc.
Paul Welch R.E. Reg.No. 29945
;January 24,2017
10725 S.Ocean Drive Lot 145 Jensen Beach,FL 34957 I 2 of 4
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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# 11651.13), (FL# 10648.1),
manufacturer's specifications, and the Florida Building Code 2014.
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Paul Welch Inc.
Paul Welch P.E. Reg.No. 29945
January 24,2017
10725 S.Ocean Drive Lot 145 Jensen Beach,FL 34957 3 of 4
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ROOF ZONE PLAN
A=3'
ZONE DESIGNATION(TYPICAL)
NOTE: CONTINUOUS APPROVED LAP SEALANT MUST BE USED AT ALL PANEL
SIDELAPS FOR SLOPES LESS THAN 3:12.
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Paul Welch Inc.
Paul Welch PE.Reg.No.29945
3anuary 24,2017
4 of 4
10725 S.Ocean Drive Lot 145 Jensen Beach,FL 34957 , /