HomeMy WebLinkAboutEngineering PAUL WELCH INC.
Mechanical Electrical Civil Engineering
1984 S.W.Biltmore St. Suite#114
Port Saint Lucie,FL 34984
Phone(772) 785 -9888 E C,,EF "
Fax(772) 785-9933 �,'
April 28,2016 APIA 26 9 2016
PERMITTING
St. Lucie county, EL
Re:Hanner Re-Roof
1301 Juanita Av.
Fort Pierce,FL
SCOPE OF"WORK•
-Remove existing roofing on low sloped roof at the North side of the existing residence roof
-Renail existing wood deck(sheathing).
-Install new roofing Certainteed Modified Bitumen NOA# 14-0529.02
DESIGN CRITERIA:
FBC 2014
ASCE?-10
PROJECT DATA:
Building Height(ft)= 8
A(ft)= 3
Mean Roof Height(ft)= 10
Roof Pitch= 0.5 /12
Shape= FLAT/MONO SLOPE
Adjustment Factor= 1.00
Improtance Factor= 1.00
Wind Velocity= 160 mph(Volt)
Exposure= C
Enclosure Class= ENCLOSED
Inter.Press. Coef = - 0.18
APPLIED UPLIFT DESIGN PRESSURES ON ROOF (ASCE 6-3) :
Zone 1 (Field)= 38.70 (-PSF) :;,;`
Zone 2 (Perimeter/Ridge)= 64.90 (-PSF)
Zone 3 (Comers)= 97.70 (-PSF) t~ 1 F
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Paul'+V. lch,P.E.
Rei Nb 29945
�inrz:;28,2016
1301 Juanita Av. Fort Pierce,F1 Iof 4
ROOFDATA:
Manufacturer: Certainteed
Type: APP Modified
NOA#: 14-0529.02
System Type: E(3)Base sheet mechanically fastened Sheet 23 of 42
Design Pressure: 52.5 (-PSF)
Membrane Type: Flintlastic GTA-FR(Torch Applied)
Deck: 15/32 "Plywood
Base Sheet: All Weather/Empire Base Sheet
Fasteners:
11 ga.Annular ring shank nails and approved tin caps
(spacing per base sheet attachment requirements)
BASE SHEET ATTACEMNT 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 "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 "O.C. in the field of the sheet.
(ENHANCED FASTENERS) Design Pressure(-PSF): 74.67
ZONE 3 : Bas'e sheet attached to deck with Fasteners as specified above
(Comers) at 3 "O.C. in( 4 )rows. One row is in the side lap. The other rows
are equally spaced approximately 9 O.C.in the field of the sheet.
(ENHANCED FASTENERS) Design Pressure(-PSF): 124.44
Paul Welch,P.E.
Reg.No 29945
April 28,2016
1301 Juanita Av. Fort Pierce,FL 2 of 4
ATTACHMENT CALCULATIONS FOR ENHANCED FASTENERS FOR ZONE 2:
PER RAS 117
FS ff.)XdID
0x X)
FS=faslener spacing(in)
fy =DP X(sq.ft./fastener) = 23.33 (Ib/fastener)
P =(design pressure reqdfor zone 2) = 64.9 (Ib/ffl)
RS=row spacing= 9 (in)
23.33 X 144
FS= . - 5.75244 (in/fastener) fasteners @ 5 O.C.
64.9 X 9
ATTACEMNT CALCULATIONS FOR ENHANCED FASTENERS FOR ZONE 3:
PER RAS 117
FS= (n)X(114)
0-x(R)
FS=faslener spacing(in)
fy =DP X(sq.ft.!fastener) = 23.33 (lb/fastener)
P =(design pressure reqdfor zone 3) = 97.7 (Ib/ft2)
RS=row spacing = 9 (in)
23.33 X 144
FS= --------------- 3.82122 (in/fastener) fasteners @ 3 O.C.
97.7 X 9
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, manufacturer's specifications,and the
Florida Building Code 2014.
Paul Welch,P.E.
Reg.No 29945
April 28,2416
1301 Juanita Av. Fort Pierce,FL 3 of 4
E
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2
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ROOF ZONE PLAN nts...
A= 3 feet
ZONE DESIGNATION(TYPICAL)
Paul Welch,P.E.
Reg.No 29945
April 28,2016 :-
1301 Juanita Av. Fort Pierce,FL 4 of 4