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f <br /> WIND LOADING ANALYSIS - Roof Components and Cladding <br /> Per ASCE 7-10 Code for Rldgs. of Any Height with Gable Roof 0 <=450 or Monoslope Roof 8 <=30 <br /> Using Part 1 &3: Analytical Procedure(Section 30.4& 30.6 <br /> Job Name: IMobley, Bradley I Subject: <br /> Job Number: I Originator: I Checker: <br /> Input Data: <br /> Wind Speed, V= 138 mph (Wind Map, Figure 26.5-1A-C) <br /> 31dg. Classification = II (Table 1-1 Occupancy Category) <br /> xposure Category= C (Sect. 26.7) B <br /> Ridge Height, hr= 12.30 ft. (hr>= he) <br /> Eave Height, he= 8.00 ft. (he<= hr) <br /> Building Width = 30.00 ft. (Normal to Building Ridge) <br /> Building Length = 50.00 ft. (Parallel to Building Ridge) L <br /> Roof Type= Gable (Gable or Monoslope) <br /> Topo. Factor, Kzt= 1.00 (Sect. 26.8& Figure 26.8-1) Plan <br /> Direct. Factor, Kd = 0.85 (Table 26.6) <br /> Enclosed? (Y/N) Y (Sect. 28.6-1 & Figure 26.11-1) <br /> Hurricane Region? Y 0 <br /> Component Name= Fastener (Purlin, Joist, Decking, or Fastener) hr <br /> h <br /> Effective Area,Ae= 687 ft.^2 (Area Tributary to C&C) The <br /> Overhangs? (Y/N) N (if used, overhangs on all sides) * [ <br /> L <br /> Resulting Parameters and Coefficients: Elevation <br /> Roof Angle, 0 = 16:00 Ideg. <br /> Mean Roof Ht., h = 15.00 ft. (h= (hr+he)/2, for roof angle>10 deg.) <br /> Roof External Pressure Coefficients, GCp: <br /> 3Cp Zone 1-3 Pos. = 0.30 (Fig. 30.4-2A, 30.4-213, and 30.4-2C) <br /> GCp Zone 1 Neg. _ -0.80 (Fig. 30.4-2A, 30.4-213, and 30.4-2C) <br /> GCp Zone 2 Neg. = 1.20 (Fig. 30.4-2A, 30.4-213, and 30.4-2C) <br /> GCp Zone 3 Neg. = -2.00 (Fig. 30.4-2A, 30.4-213, and 30.4-2C) <br /> Positive& Negative Internal Pressure Coefficients, GCpi (Figure 26.11-1): <br /> +GCpi Coef. =1 0.18 (positive internal pressure) <br /> -GCpi Coef. = 0.18 (negative internal pressure) <br /> If z <= 15 then: Kz=2.01*(15/zg)^(2/(x) , If z> 15 then: Kz=2.01*(z/zg)^(2/a) (Table 30.3-1) <br /> a= 9.50 (Table 26.9-1) <br /> zg = 900 (Table 26.9-1) <br /> Kh = 0.85 (Kh = Kz evaluated at z= h) <br /> Velocity Pressure: qz= 0.00256*Kz*Kzt*Kd*VA 2 (Sect. 30.3.2, Eq. 30.3-1) <br /> qh = 35.18 psf qh = 0.00256*Kh*Kzt*Kd*V"2 (qz evaluated at z= h) <br /> Design Net External Wind Pressures(Sect. 30.4&30.6): <br /> For h <=60 ft.: p= qh*((GCp)-(+/-GCpi)) (psf) <br /> For h > 60 ft.: p= q*(GCp) -qi*(+/-GCpi) (psf) <br /> where: q =qh for roof <br /> qi =qh for roof(conservatively assumed per Sect. 30.6) <br />