HomeMy WebLinkAboutLETTER - SCOPE OF WORK�h
PAUL WELCH INC. SCANNED
Mechanical Electrical Civil Engineering BY
1984 S.W. Biltmore St. Suite#114 1t Nde CountY
Port Saint Lucie, FL 34984
Phone (772) 785 - 9888
Email pwelchinc@aol.com
RECEIVED
February 13, 2018 FEB B 0 2018
Re: Eldridge Re -Roof ST. Lucie County, Permitting
10725 S. Ocean Drive Lot 43
Jensen Beach, FL 34957 FILE Cur T
SCOPE OF WORK:
Remove existing roofing and install new 5-V Crimp Metal Roof (Gulf Coast Supply &
Manufacturing FL # 11651.13) at above referenced residence address over new underlayment
and existing plywood sheathing.
DESIGN CRITERIA:
FBC 2017
ASCE7-10
PROJECT DATA:
BUILDING HIEGHT = 10'
A= 3'
MEAN ROOF HIEGHT = <15'
ROOF ANGLE = 3:12
SHAPE = PITCHED GABLE
RVIPROTANCE FACTOR = 1.00
WIND VELOCITY V ult =165 MPH
WIND VELOCITY V asd = 124 MPH
EXPOSURE = D
ENCLOSURE CLASS = ENCLOSED BUILDING
INTERNAL PRESSURE COEFFICIENT = -0.18
ZONE 1 (Field) _ -44.7
ZONE 2 (Perimeter/Ridge) = -75.5
ZONE 3 (Corners) = -110.8
Paul- Welch Inc.
Paul Welch P.E. Reg. No. 29945
February 13, 2018
10725 S. Ocean Drive Lot 437 Jensen Beach, FL 34957 / 1 of 4
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METAL ROOFING ATTACIBRNT REQUIREMENTS: .
Metal roofing to'be attached with #9_-15 x 1 %2" long (minimum '/4". penetration through
plywood sheathing) Woodgrip screws with weather sealing washers spacing as follows:
ZONE 1(Field):
Fasteners through ribs (Type 1 per product approval) .at 16" O.C.
ZONE 2 (Perimeter/ Ridge):
Fasteners through ribs (Type 1 per product approval) at 16" O.C.
ZONE 3 (Corners):
Fasteners adjacent to ribs both sides (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: -
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 rooficover 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 P.E. Reg. No. 29945
- February 13, 2018
10725 S. Ocean Drive Lot 437 Jensen Beach, FL 34957 2 of 4
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# 16048.1),
manufacturer's specifications, and the Florida Building Code 2017. .
10725 S. Ocean Drive Lot 437 Jensen Beach, FL 34957
Paul Welch Inc.
Paul Welch P.E. Reg. No: 29945
February 13, 2018
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. r r
Pa Welch Inc.
Paul Welch E. Reg. No. 29945
Feb r 13, 2018
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10725 S. Ocean Drive Lot 437 Jensen Beach, FL 34957 / 4 of 4