Chimney Design [PDF]

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Chimney Design Calculations Mean diameter at top Mean diameter at bottom Height of straight segment Height of bottom (tapered) segment Wind Load for the part at a height between Wind load for the part at a height below 100 ft



Dt Db Hs Hb



3048 4572 36576 12192 30480 mm and 112.3 kg/m2



Distance of trial section taken from top of chimney Assumed thickness of steel plate Density of steel plate Weight per unit cross-section of steel plate Thickness of lining Density of Lining Weight per unit cross-section of Lining Total weight per unit cross-section of chimney Weight per meter of height Moment due to wind load M Corrosion Allowance t/R A S f Equivalent Height He L Radius of gyration r L/r Y Fy Yield Stress at mean shell temperature Modulus of elasticity at mean shell temperature E 8FP/E 20 Fy/E X F



mm mm mm mm 48768 mm 161.12 kg/m2



18288 mm 6.35 mm 7842.64 kg/m3 49.800764 kg/m2 50.8 mm 1762.03 kg/m3 89.511124 kg/m2 139.311888 kg/m2 1333.99135 kg/m 82123.3858 kg-m 1.6 mm 0.0031168 45483.9784 mm2 34658791.6 mm3 2905847.52 kg/m2 44799.4001 mm 89598.8002 mm 1077.468 mm 83.1568085 0.86694571 248.211 MPa 193.053 GPa 0.0072 0.02571429 3833506.53 kg/m2 3323442.06 kg/m2 Design is OK



Length Conversion Table



Chimney Design Calculations Mean diameter at top Mean diameter at bottom Height of straight segment Height of bottom (tapered) segment Wind Load for the part at a height between Wind load for the part at a height below 100 ft



Dt Db Hs Hb



3048 4572 36576 12192 30480 mm and 112.3 kg/m2



Distance of trial section taken from top of chimney Assumed thickness of steel plate Density of steel plate Weight per unit cross-section of steel plate Thickness of lining Density of Lining Weight per unit cross-section of Lining Total weight per unit cross-section of chimney Weight per meter of height Moment due to wind load M Corrosion Allowance t/R A S f Equivalent Height He L Radius of gyration r L/r Y Fy Yield Stress at mean shell temperature Modulus of elasticity at mean shell temperature E 8FP/E 20 Fy/E X F



Wind moment at the base of chimney



Mb



mm mm mm mm 48768 mm 161.12 kg/m2



27432 mm 8 mm 7842.64 kg/m3 62.74112 kg/m2 50.8 mm 1762.03 kg/m3 89.511124 kg/m2 152.252244 kg/m2 1457.90269 kg/m 178556.69 kg-m 1.6 mm 0.00419948 61283.6762 mm2 46698161.3 mm3 4476225.46 kg/m2 44799.4001 mm 89598.8002 mm 1077.468 mm 83.1568085 0.86694571 248.211 MPa 193.053 GPa 0.0072 0.02571429 5165145.64 kg/m2 4477900.88 kg/m2 Design is OK 519107.075 kg-m



Length Conversion Table



164246.8 3823634 355868 133559.2 489427.2 29679.83



Chimney Design Calculations Mean diameter at top Mean diameter at bottom Height of straight segment Height of bottom (tapered) segment Wind Load for the part at a height between Wind load for the part at a height below 100 ft



Dt Db Hs Hb



3048 4572 36576 12192 30480 mm and 112.3 kg/m2



Distance of trial section taken from top of chimney Assumed thickness of steel plate Density of steel plate Weight per unit cross-section of steel plate Thickness of lining Density of Lining Weight per unit cross-section of Lining Total weight per unit cross-section of chimney Weight per meter of height Moment due to wind load M Corrosion Allowance t/R A S f Equivalent Height He L Radius of gyration r L/r Y Fy Yield Stress at mean shell temperature Modulus of elasticity at mean shell temperature E 8FP/E 20 Fy/E X F



Wind moment at the base of chimney



Mb



mm mm mm mm 48768 mm 161.12 kg/m2



48768 mm 14 mm 7842.64 kg/m3 109.79696 kg/m2 50.8 mm 1762.03 kg/m3 89.511124 kg/m2 199.308084 kg/m2 1908.48939 kg/m 519107.075 kg-m 1.6 mm 0.00813648 118737.123 mm2 90477687.5 mm3 6521263.72 kg/m2 44799.4001 mm 89598.8002 mm 1077.468 mm 83.1568085 0.86694571 248.211 MPa 193.053 GPa 0.0072 0.02571429 10007469.7 kg/m2 8675932.96 kg/m2 Design is OK 519107.075 kg-m



Length Conversion Table



355868 5737404 355868 133559.2 489427.2 29679.83