HomeMy WebLinkAboutEngineering Scope Of WorkPAiTf.WELCH INC. F ILL (:(OPY
Mechanical Electrical Civil Engineering
1984 S.W. Biltmore St. Suite#114
Port Saint Lucie, FL 34984
Phone (772) 785 - 9888
Email pwelchinc@aol.com
,December 14, 2017
Re: Residential Re -Roof
3191 Daniels St.
Fort Pierce, FL
SCOPE OF WORK:
- Remove existing roofing on low slope residence existing roof (right side section).
- Renail existing roof deck.
- Install new roofing CertainTeed APP Modified
DESIGN CRITERIA:
FBC 2014
ASCE7-10
PROJECT DATA:
Building Height (ft) _
A(ft)=
Mean Roof Height (ft)=
Roof Pitch =
Shape =
Adjustment Factor =
Improtance Factor =
Wind Velocity =
Exposure =
Enclosure Class =
Inter. Press. Coef = -
8'
3
15
0.25 /12
FLAT / MONO SL
1.00
1.00
170 mph (3 sec gust)
C
ENCLOSED
0.18
APPLIED UPLIFT DESIGN PRESSURES ON ROOF (ASCE) :
Zone 1 (Field) = 38.00 (- PSF)
Zone 2 (Perimeter/ Ridge) = 63.80 (- PSF)
Zone 3 (Comers) = 96.00 (- PSF)
DEC 1 4 BCD D
PAUL WELCH INC.
MECH-ELECT-CIVIL ENG.
1984 81Lfi+-rf"IE ST. #114
PORT SAINT LOCIE, FL 34984
PAUL WELCH P.E.
FLA REG NO.29945
DEC 14 2011
ROOF ATTACHMENT REQUIREMENTS
ROOF DATA:
Manufacturer:
CERTAINTEED
Type:
MODIFIED BITUMEN
NOA#:
14-0529.02
System Type :
E(3) Base sheet Mechanically fastened page 23 of 42
Design Pressure:
52.5 (-PSF) PER NOA
Membrane Type:
APP MODIFIED
Deck:
19/32 " Plywood
Base Sheet:
Weather / Empire Base Sheet
Fasteners:
11 ga. annular ring shank nails and approved tin caps
(spacing per base sheet attachment requirements)
BASE SHEET ATTACHMENT REQUIREMENTS:.
ZONE I: Base sheet attached to deck with Fasteners as specified above
(Field) at , 8 " O.C. in ( 4 ) rows. One row is in the side lap. The other rows
are equally spaced approximately 9.8 " O.C. in the field of the sheet.
(METHOD PER NOA) Design Pressure (-PSF): , 52.5
ZONE 2 : Base sheet attached to deck with Fasteners as specified above
(Perimeter/ Ridge) at 5. " O.C. in ( 4 ) rows. One row is in the side lap. The other rows
are equally spaced approximately 9.8 " O.C. in the field of the sheet.
(ENHANCED FASTENERS) Design Pressure (-PSF): 75.5
ZONE 3 : Base sheet attached to deck with Fasteners as specified above
(Corners) at 3 " O.C. in ( 4 ) rows. One row is in the side lap. The other rows
are equally spaced approximately 9.8 " O.C. in the field of.the sheet.
(ENHANCED FASTENERS) Design Pressure (-PSF): 125.8
MEMBRANE REQUEREMENTS:
One ply of Flintlast FR Cap 30 TCoolStar torch adhered to base sheet.
SURFACING
Any of the approved surfacing options as per Table 4 of the Product Approval
DECK INSTALLATION: .
Nail all plywood sheathing (19/32" thick minimum) with 8D ring -shank nails at 4" O.C.
perimeter and 6" O.C. field for all zones.
NOTE: REFER TO MANUFACTURER'S SPECIFICATIONS AND INSTALLATION
INSTRUCTIONS FOR ADDITIONAL INFORMATION AND QUIREMENTS.
PAUL WELCH INC.
MECH-ELECT-CIVIL ENG.
1984 BILi IvIl OR, E ST. #114
PORT SAIN-I' LUCIE, FL 34984
PAUL WELCH R.E.
DEC 14 2011 FLA REG NO.29945
ATTACHMENT CALCULATIONS FOR ENHANCED FASTENERS FOR ZONE 2:
PER RAS 117
FS = _6y X 114
(P) X (R9)
FS = fastener spacing (in)
fy =DPX (sq. ft. /fastener) = 25.79 (lb / fastener)
P =(design pressure req'd for zone 2) = 63.8 (lb / ft2)
RS = row spacing = 9.843 75 (in)
25.79 X 144
• FS =------------------ = 5.9143156 (in / fastener) --> fasteners @
63.8 X 9.84375
ATTACHIIIENT CALCULATIONS FOR ENHANCED FASTENERS FOR ZONE 3:
PER RAS 117
FS = — X 614
(P) X (RS)
FS = fastener spacing (in)
fy =DPX (sq. ft. /fastener) = 25.79 (1b / fastener)
P =(design pressure req'd for zone 3) 96 (lb / ft2)
RS = row spacing = 1 9.84375 (in)
25.79 .X 144
FS =---_____ = 3.9305556 (in / fastener) fasteners @
96 X 9.84375 _
All work to be in compliance with product approval, manufacturer's specifications, and the
Florida Building Code 2014.
5 " O.C.
3 " O.C.
f .
/PAUL WELCH INC.
MECH-ELr::` r—CIVIL ENG.
1984 BIl.' i.%!Gr's= ST. #114
PORT SAINT L!:CIE, FL 34984
PAUL WELCH R.E.
DEC 4 2017 FLA REG NO.29945
ROOF ZONE PLAN
A=3'
Q, Q, Q = ZONE DESIGNATION (TYPICAL)
PAUL WELCH INC.
IVIECH-ELECT-CIVIL ENG.
1984 ST. #114
PORT SP,fP•!T ;_iiE, FL 34984
DEC 14 201 FLA REG NO.299 5