Wind Pressure Calculations
Building Input Data
Building LengthInputL=24.9428m
Building BreadthInputB=9.39799999999876m
Building HeightInputH=6.9m
Short Side Area=9.39799999999876*6.9=64.8461999999914m^2
Long Side Area=24.9428*6.9=172.10532m^2
Roof Area=24.9428*9.39799999999876=234.412434399969m^2
All Openings Gross Area=100m^2
All Walls Area=2 * (24.9428+9.39799999999876) * 6.9=473.903039999983m^2
Ave Column Spacing Long sideInput=2.3622m
Ave Column Spacing Short sideInput=4.318m
Tributory area Long Side=2.3622*6.9=16.29918m^2
Tributory area Short Side=4.318*6.9=29.7942m^2
Tributory area Roof=2.3622*6.9=16.29918m^2
Wind ZoneInput=I
Topographical EffectInput=True
Primary Exposure
Terrain Category Long Side 1Input=2 = Open Terrain with Scattered Obtructions of ht 1.5 to 10 m;5.3.2.2 Table 2 of IS 875(3)
Terrain Category Long Side 2Input=3 = Terrain with Numerous Obtructions of upto 10 m ht well Wooded areas;''
Terrain Category Short Side 1Input=1 = Open Terrain with Obstructions ht < 1.5 m;''
Terrain Category Short Side 2Input=4 = Terrain with highly Numerous Spaced Obtructions of ht above 25 m;''
Is Building Circular?Input=False6.1.1 IS 875(3)
Is Cyclone Affected?Input=True5.3.4 IS 875(3)
Structure NatureInput=35.3.4 IS 875(3)
Multi Terrain ApplicableInput=True5.3.2.4 Table 3 & Appendix B IS 875(3)
Secondary Exposure
Terrain Category Long Side 1Input=1 = Open Terrain with Obstructions ht < 1.5 m;5.3.2.4 Table 3 of IS 875(3)
Terrain Category Long Side 2Input=2 = Open Terrain with Scattered Obtructions of ht 1.5 to 10 m;
Terrain Category Short Side 1Input=1 = Open Terrain with Obstructions ht < 1.5 m;
Terrain Category Short Side 2Input=3 = Terrain with Numerous Obtructions of upto 10 m ht well Wooded areas;
FetchInput=200m1 for m
FetchInput=0.2km7 for Km
Development HeightFor Primary Exposure=20mTable 3 of IS 875(3)
FetchInput=200m1 for m
FetchInput=0.2km7 for Km
Development HeightFor Primary Exposure=20mTable 3 of IS 875(3)
FetchInput=200m1 for m
FetchInput=0.2km7 for Km
Development HeightFor Primary Exposure=20mTable 3 of IS 875(3)
Pressure Coefficients
Permeability of BuildingCalculated=HighRelativeCl: 6.2.2.1 & 2 of IS 875(3) (rev4)
Internal Pressure CoefficientCode provisionCpi=0.7+/-
Height RangeCodal Provisions=1[0 for <= 0.5] OR [1 For <= 1.5] [2 For <= 6.0] AND [3 for >6.0] m
Plan RatioCodal Provisions=1[0 for <= 1.5] OR [1 For <= 4.0] AND [2 For > 4.0]
External Pressure CoefficientWall A0=0.7CpeTable 5 of IS 875(3)
Wall A90=-0.5
Wall B0=-0.3
Wall B90=-0.5
Wall C0=-0.7
Wall C90=0.7
Wall D0=-0.7
Wall D90=-0.1
Wind Pressure Affecting Coefficients
Class Of StrcutureCode Data Table=4Years[1 for 'General'];[2 for 'Temp']; [3 for unImp] And [4 for Imp] Strcutures
Mean Probable LifeCode Data Table=100Years5.3.1 table 1 IS 875(3)
Risk CoefficientCode Data Tablek1=1.050/05.3.1 table 1 IS 875(3)
Topography FactorCalculatedk3=15.3.3.1 IS 875(3)
Cyclonic Importance FactorCodal Requirementk4=15.3.4 IS 875(3)
Wind Directionality FactorCodal ProvisionsKd=15.4.1 IS 875(3)
Area Averaging FactorCodal ProvisionsKa=1.00866125.4.2 IS 875(3)
Area Averaging FactorCodal ProvisionsKa=0.83972565.4.2 IS 875(3)
Area Averaging FactorCodal ProvisionsKa=1.00866125.4.2 IS 875(3)
Design wind Pressure Diff Ht
Long Side 01 of the Structure
Elevation/HeightInputH0=0.6m
Terrain FactorCode Data Tablek2=1.055.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1.05*1*1Vz=36.38m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *36.38^ 2Pz=0.79kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.79Pd=0.8kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.8Fwc=1.12kN/m^2Cpnet*Pd
Elevation/HeightInputH1=3.75m
Terrain FactorCode Data Tablek2=1.055.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1.05*1*1Vz=36.38m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *36.38^ 2Pz=0.79kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.79Pd=0.8kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.8Fwc=1.12kN/m^2Cpnet*Pd
Elevation/HeightInputH2=6.9m
Terrain FactorCode Data Tablek2=1.055.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1.05*1*1Vz=36.38m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *36.38^ 2Pz=0.79kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.79Pd=0.8kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.8Fwc=1.12kN/m^2Cpnet*Pd
Long Side 11 of the Structure
Elevation/HeightInputH0=0.6m
Terrain FactorCode Data Tablek2=15.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1*1*1Vz=34.65m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *34.65^ 2Pz=0.72kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.72Pd=0.73kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.73Fwc=1.022kN/m^2Cpnet*Pd
Elevation/HeightInputH1=3.75m
Terrain FactorCode Data Tablek2=15.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1*1*1Vz=34.65m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *34.65^ 2Pz=0.72kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.72Pd=0.73kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.73Fwc=1.022kN/m^2Cpnet*Pd
Elevation/HeightInputH2=6.9m
Terrain FactorCode Data Tablek2=15.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1*1*1Vz=34.65m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *34.65^ 2Pz=0.72kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.72Pd=0.73kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.73Fwc=1.022kN/m^2Cpnet*Pd
Short Side 01 of the structure
Elevation/HeightInputH0=0.6m
Terrain FactorCode Data Tablek2=1.055.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1.05*1*1Vz=36.38m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *36.38^ 2Pz=0.79kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.79Pd=0.8kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.8Fwc=1.12kN/m^2Cpnet*Pd
Elevation/HeightInputH1=3.75m
Terrain FactorCode Data Tablek2=1.055.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1.05*1*1Vz=36.38m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *36.38^ 2Pz=0.79kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.79Pd=0.8kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.8Fwc=1.12kN/m^2Cpnet*Pd
Elevation/HeightInputH2=6.9m
Terrain FactorCode Data Tablek2=1.055.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*1.05*1*1Vz=36.38m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *36.38^ 2Pz=0.79kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.79Pd=0.8kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.8Fwc=1.12kN/m^2Cpnet*Pd
Short Side 11 of the structure
Elevation/HeightInputH0=0.6m
Terrain FactorCode Data Tablek2=0.915.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*0.91*1*1Vz=31.53m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *31.53^ 2Pz=0.6kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.6Pd=0.61kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.61Fwc=0.854kN/m^2Cpnet*Pd
Elevation/HeightInputH1=3.75m
Terrain FactorCode Data Tablek2=0.915.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*0.91*1*1Vz=31.53m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *31.53^ 2Pz=0.6kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.6Pd=0.61kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.61Fwc=0.854kN/m^2Cpnet*Pd
Elevation/HeightInputH2=6.9m
Terrain FactorCode Data Tablek2=0.915.3.2.2 Table 2 of IS 875(part 3)
Design Wind Speed=33*1.05*0.91*1*1Vz=31.53m/eSecondVb.value * k1 * k2 * k3 * k4 >> 5.3 IS 875(3)
Wind Pressure=0.6 *31.53^ 2Pz=0.6kN/m^20.6 * Vz^2 >> 5.4 IS 875(3)
Design Wind Pressure=1.0086612*1*0.6Pd=0.61kN/m^2Pz * Ka*Kd
Pressure on Cladding=-1.2*0.61Fwc=0.854kN/m^2Cpnet*Pd