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g��u�°aC "o�Engineering & Testing Co.
7450 Griffin Roadl Suite 140, Davie, FL 33314
Phone: (954)5811I7115, Fax: (954)581.2415
www.cebb.net
May 21, 2018
Project: Quintana Residence -Low slope Reroof FILE COPY
Address:
631 Beach Avenue, Port t. Lucie, FL 34952
Roofing Contractor:
Storm Team C-tion
RAS NO:
117 Calculation
NOA:
15-0622.21 Flintlastic Self dhered Roofing Systems Over Wood Decks
Deck System Type:
E(2) Page 13 of 19 of NOA: Base sheet mechanically fastened
Mean Roof Height =
below: 20 feet
RAS 128 Wind Uplift Pressures:
p1= 42.8 p2= 71.7 p3= 108
as per RAS 128 (Tabel 1-Exposure Category "C" ), FBC 2017
NOA Design Pressure:
pd noa= 52.5
NOA-Side lap row:
c slr= 1 NOA-Center lap row: c clr=
NOA-Side lap spacing:
a slr= 6 NOA-Center lap spacing: a clr=
nw=net width (ft)
sh=sheet width (in)
sw= 39 375
slw=side lap width (in)
51w= 3
nw=(sw-slw)/12 nw= 3..031
nl=net length(ft)
nl=100/nw nl= 32.
fn= number of fasteners per spacing
b=nl (net lentgth per row)
a=fastener spacing (in)
-sir=side lap row
-clr=center lap row
c= number of rows @spacing "a"
-slr=side lap row
-clr=center lap row
d=number of fastener per square
side lap row
d slr=(fn/a slr)*(12/1)*(b/1)*(c slr/ 1*1)
d slr= 65.98
1 b= nl
center lap row
tl clr=(fn/a clr)*(12/1)*(b/1)*(c clr/ 1*1)
I .
Id clr= 263.92
i
I
4
6
Page 1
Area per fastener
as= area per square (sf/square) as= 100
fa= fastener area (sf)
fa=as/(d sir+d cir) fa= 0.303
Fastener Value Calculation
pd noa=maximum NOA design pressure (psf)
fy=fastener value (lb)
p=design pressure
p1 field : p2 perimeter : p3 corner
fs=required fastener spacing
rs=row spacing
fy= pd noa*fa fy= 15.914
rs=nw*12/(c slr+c clr) rs= 7.275
rsp=proposed row spacing for perimeter (4)
rsp2=(nw*12)/(1+5) rsp2= 6.063 4 rows in the field spaced at 6.063
rsp=proposed row spacing for corner areas (5)
rsp3=(nw*12)/(1+6) rsp3= 5.196 5 rows in the field spaced at 5.196
Field Zone Spacing Requirement
6 Inches; 6" o/c lap and 4 rows @ 6" o/c
fs= (fy*144)/(p1*rs) fs= 7.360 required fora total of five (5) rows;
Perimeter Zone Spacing Requirement
5 Inches; 5" o/c lap and 5 rows @ 5" o/c
fsp=(fy*144)/(p2*rsp2) fsp= 5.272 required fora total of six (6) rows;
Corner Zone Spacing Requirement
4 Inches; 4" o/c lap and 6 rows @ 4" o/c
fsc=(fy*144)/(p3*rsp3) fsc= 4.083 required fora total of seven (7) rows;
Prepared by:
CeBB Engineering & Testing Co. (CA#9807)
05/21/18
Eduard adiu, P.E.
459997
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