HomeMy WebLinkAboutEngineering 9
5tr 9 "t�15 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
September 24,2015
Re:RESIDENTIAL RE-ROOF
226 NE JARDAIN RD.
PORT ST.LUCIE,FL
SCOPE OF WORK:
-Remove existing roofing on existing residence.
-Re-nail existing wood deck(sheathing).
-Install new roofing Johns Manville APP Modified Bitumen Roofing.
DESIGN CRITERIA:
FBC 2014
ASCE?-10
PROJECT DATA:
Building Height(ft)= 8
A(ft)= 3
Mean Roof Height(ft)= 10
Roof Pitch= 1 /12
Shape= FLAT/MONO c
Adjustment Factor= 1.00
Improtance Factor= 1.00
Wind Velocity= 160 mph(Volt)
Exposure= B
Enclosure Class= ENCLOSED
Inter. Press. Coef = - 0.18
APPLIED UPLIFT DESIGN PRESSURES ON ROOF (ASCE 6-3) :
Zone 1 (Field)= 27.60 (-PSF)
Zone 2(Perimeter/Ridge)= 46.40 (-PSF)
Zone 3 (Comers)= 69.80 (-PSF)
Paul Welch,P.E.
Reg.No 29945
226 NE JARDAIN RD. PORT ST.LUCIE,FL 1 of 4
S4 4 ?Oa5
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ROOF DATA:
Manufacturer: Johns Manville
Type: APP Modified Bitumen
NOA#: 13-0529.02
System Type : D(1)Loose Laid Insulation,Membrane and Anchor Mechanically Fasteded
Through Insulation into Roof Deck(Pg. 13 of 18)
Design Pressure: 45 (-PSF)
Membrane Type: One Ply Tricor M FR CR(heat welded)
Deck: 19/32 "Plywood
Insulation: Fesco Board 1" Thick
Base Sheet: GlasBase Plus
Fasteners: U1traFast Fasteners and Metal Plates fasteners shall be sufficient
length to achieve 1/4"penetration through plywood.
(spacing per base sheet attachment requirements)
MEMBRANE ATTACHMENT
Heat Weld Membrane while maintaining 4" side laps and 6" side laps.
BASE SHEET ATTACHMENT REQUIREMENTS:
ZONE 1 : Base sheet attached to deck with Fasteners as specified above
(Field) at 18 " O.C. in( 3 )rows. One row is in the side lap. The,other rows
are equally spaced approximately 12 "O.C.in the field of the sheet.
(METHOD PER NOA) Design Pressure(-PSF): 45
ZONE 2 : Base sheet attached to deck with Fasteners as specified above
(Perimeter/Ridge) at 13 " O.C. in( 3 )rows. One row is in the side lap. The other rows
are equally spaced approximately 12 "O.C. in the field of the sheet.
(ENHANCED FASTENERS) Design Pressure(-PSF): 47.47
ZONE 3 : Base sheet attached to deck with Fasteners as specified above
(Corners) at 8 " O.C. in( 3 )rows. One row is in the side lap. The other rows
are equally spaced approximately 12 "O.C.in the field of the sheet.
(ENHANCED FASTENERS) Design Pressure(-PSF): 77.14
Paul Welch,P.E.
Reg.No 29945
226 NE JARDAIN RD. PORT ST.LUCIE,FL 2 of 4
EP 2 44 2015
ATTACHMENT CALCULATIONS FOR ENHANCED FASTENERS FOR ZONE 2:
PER RAS 117
FS= )JX(114)
(°)X X)
FS =fastener spacing(in)
fy =DPX(sq.ft. /fastener) = 51.43 (lb/fastener)
P =(design pressure req'd for zone 2) = 46.4 (lb/ft2)
RS=row spacing = 12 (in)
51.43 X 144
FS= ------------------- = 13.3005 (in/fastener)-->fasteners @ 13 " O.C.
46.4 X 12
ATTACHMENT CALCULATIONS FOR ENHANCED FASTENERS FOR ZONE 3:
PER RAS 117
FS jj X 114
(P)X(RS)
FS=fastener spacing(in)
f y =DP X(sq.ft.I fastener) = 51.43 (lb/fastener)
P =(design pressure req'd for zone 3) = 69.8 (lb/ft2)
RS=row spacing = 12 (in)
51.43 X 144
FS= ---------- - = 8.84159 (in/fastener)—>fasteners @ 8 " O.C.
69.8 X 12
INSULATION ATTACHMENT REQUIREMENTS:
Insulation shall be Fesco Board,preliminarily attach insulation to deck with(4)fasteners per board and then
permanetly attached insulation durring base sheet attachment.
DECK INSTALLATION:
Re-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.
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
226 NE JARDAIN RD. PORT ST.LUCIE,FL 3 of 4
SEP 2 420,15
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ROOF ZONE PLAN nts...
A= 3 feet
iO, 20,03 =ZONE DESIGNATION(TYPICAL)
Paul Welch,P.E.
Reg.No 29945
226 NE JARDAIN RD. PORT ST.LUCIE,FL 4 of 4
SE 3- 2 4 2,015
Membrane Type: APP
Deck Type 1I: Wood,Insulated
Deck Description: 19/32'or greater plywood or wood plank
System Type D(1): All insulation is loose laid with preliminary attachment to roof deck. Membrane
and/or anchor sheet is subsequently mechanically fastened through insulation to
the roo deck.
All General and System limitations apply.
One or more layers of any of the following insulations:
Base Insulation Layer Insulation Fasteners Fastener
(Table 3) Density/W
ENRGY 3,ENRGY 3 25 PSI,ValuTherm,ValuTherm 25 PSI,R Panel,R Panel 25 PSI,ENRGY 3
AGF, ENRGY 3 AGF 25 PSI,ValuTherm AGF,ValuTherm AGF 25 PSI,ENRGY 3 AGF,
ENRGY 3 AGF 25 PSI,ValuTherm AGF,ValuTherm AGF 25 PSI„Fesco Foam,DuraFoam
Minimum 1.5"thick N/A N/A
Fesco Board
Minimum 3/"thick N/A N/A
Retro-Fit Board,DuraBoard
Minimum 1/2"thick N/A N/A
Note: Top layer shall have preliminary attachment,prior to the installation of the base/anchor
sheet,at a minimum application rate of two fasteners per board for insulation boards having no
dimension greater than 4 ft.,and four fasteners for any insulation board having no dimension
greater than 8 ft. All layers of insulation and base sheet shall be simultaneously fastened. See
base anch hero hsro�t below for fasteners and density.
Base Sheet: (Option#1) One ply of JM APP Base,PermaPly 28,G1asBase Plus or
Ventsulation mechanically fastened through the insulation to the deck with
U1traFast Fasteners and Metal Plates at a 4"side lap 12"o.c. and two rows
staggered R— a center o e sheet 18" o.c.
(Maximum Design Pressure:—15 psf.,See General Limitation#9.)
(Option#2)Minimum two plies of PermaPly 28 or Ventsulation simultaneously
fastened through the insulation to the deck with Ultrafast Fasteners and Metal
Plates spaced 9"o.c.in a 4"lap and 12"o.c.in two staggered rows in the center of
the sheet.
(Maximum Design Pressure.—52.5 ps,f:,See General Limitation#7.)
Ply Sheet: (Optional)One or more plies of JM APP Base or APPeX 4S heat welded to base
N 14 sheet while maintaining 4"side laps and 6"end laps.
Membrane: One or more plies of APPeX 4.5M or APPeX 4.5M FR heat welded wbile
r maintaining 4"side laps and 6"end laps.
NOA No.: 13-0529.02
rxArtwK►DeCOUtrrir Expiration Date: 06/14/16
APPROVED Approval Date: 02/20/14
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