Design Of Hot Rolled Rectangular Hollow Section {RHS}
As Per IS : 800 - 2007
 (This is a front End, Actual program is available with the software.)
Factored Direct Load In KN
Select Nature Of Load Tension        Compression
Factored BM In KN-M {M_ZZ} Along Longer Dim.
Factored BM In KN-M {M_YY} Along Shorter Dim.
Factored Shear Force In KN
Choose Limiting Slenderness ratio (SR = L/R)
Enter Effective Length LXX in MM {or Span}
Enter Effective Length  LYY in MM
Choose Rectangular Hollow Section
Permissible Deflection Ratio
Yield Stress in N/MM2 {Fy}
                                        

 
When Design Button is clicked, following Design Results will be displayed.
  

Hot Rolled RHS Design Under Axial Force & Bending
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Factored Direct Load (KN) = 30
Nature Of Load = compression
Factored Bending Moment_MZZ (KN-M) = 1
Factored Bending Moment_MYY (KN-M) = 0
Factored Shear Force (KN) = 10
Permissible L/R ratio = 180
Critical L/R ratio = 170.54
Eff. LXX (MM) = 2200
Eff. LYY (MM) = 2200
Permissible Deflection in MM = 22
Rectangular Hollow Selection = 66X33X3.6
Total Weight (kg) = 10.84
R_ZZ (MM) = 22.5
R_YY (MM) = 12.9
AREA (MM2) = 628
Actual Deflection in MM = 5.27
ep = 1
d / t Ratio = 15.33
b / t Ratio = 6.16
Section Class is : Plastic Under Bending
ym0 = 1.1
SR_ZZ = 97.77
SR_YY = 170.54
SR_Critical = 170.54
Euler Buckling Stress_ZZ {fcc} in N/MM2 = 206.51
Effective SR_ZZ {Lambda} = 1.1
Alpha for Buckling Class a for Hot Rolled RHS = 0.21
Value of Phi = 1.19
Design Compressive Stress_ZZ in N/MM2 = 135.41
Compressive Strength_ZZ of RHS in KN = 85.04
Euler Buckling Stress_YY {fcc} in N/MM2 = 67.88
Effective SR_YY {Lambda} = 1.91
Alpha for Buckling Class a for Hot Rolled RHS = 0.21
Value of Phi = 2.52
Design Compressive Stress_YY in N/MM2 = 54.65
Compressive Strength_YY of RHS in KN = 34.32
Z_Plastic in cm3 = 12.56
Z_Elastic in cm3 = 9.66
Shape Factor_ZZ = 1.3
Buckling Resistance of RHS_ZZ in KN-M = 2.63
Z_Plastic_YY in cm3 = 7.66
Z_Elastic_YY in cm3 = 6.37
Beta = 1
Shape Factor_YY = 1.2
Buckling Resistance of RHS_YY in KN-M = 1.73
Tensile Cap. of RHS in KN = 142.72
60 % Shear Cap. of RHS in KN = 16.48

N / Nd = 0.87
MZ / Mdz = 0.37
MY / Mdy = 0
RHS Unsafe, Ratio > 1 :: Ratio = 1.25
Refer Section Strength : Clause 9.3.1.1

Mcr in KN-M = 1.6
lamda_lt = 0.04
Ky = 1.69
KLT = 0.99
ny = 0.87
Lambda_Y = 170.54
Lambda_LT = 0.04
Cmy = 1
Cmlt = 1
Sec. Unsafe, Ratio > 1 :: Ratio = 1.25
:: Refer Member Strength : Clause 9.3.2.2
Ky = 1.69
ny = 0.87
Kz = 1.28
ny = 0.87
Cmy, Cmz = 1
Sec. Safe, Ratio <= 1 :: Ratio = 0.83
:: Refer Member Strength : Clause 9.3.2.2

%%%%% Section is Unsafe %%%%%