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HomeMy WebLinkAboutENGINEERINGLe� n B BY ®��, 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 01