file:///tt/file_convert/5695d0bf1a28ab9b0293b80a/document.xls

InfoMile SolutionsClient: S.V.POWER PVT LTD Date: 15.09.2008

Project: 500 TPH CFBC BOILER Done by: AKVJob Title: Design of Footing Checked by:Building: COMPRESSOR BUILDING Rev: 0

Reference Description of Problem Values UnitsGrade of Concrete M25 25.00 MPaGrade of Steel Fe500 500.00 MPaUnit Weight of Soil 18.00 kN

X Safe Bearing Capacity of soil, SBC 600.00Depth of Pedestal 0.60 m

Z Width of Pedestal 0.30 mLength of Pedestal above footing 2.70 mLength of Footing 1.50 mWidth of Footing 1.20 mArea of Footing A 1.80Depth of Footing D 0.40 mEffective Cover to Steel cc 0.06 mEffective depth d 0.34 mMoment of inertia about x, 0.45Moment of inertia about z, 0.36Weight of soil above footing 78.73 kNWeight of Footing 18.00 kNGOVERNING LOAD CASESNORMAL LOADS(DL+IL)Pi 369.82 kNMxi 8.53 kNmMzi 5.88 kNmDL+IL+EQXPii 392.16 kNMxii 7.94 kNmMzii 36.04 kNmDL+IL+EQZPiii 388.82 kNMxiii 8.02 kNmMziii 30.50 kNm

NORMAL LOADS(DL+IL)Pi/A 259.20 kN/m2Mxi/Zxx 18.96 kN/m2Mzi/Zzz 16.33 kN/m2

Pmaxi 294.49 kN/m2Pmini 223.91 kN/m2SINCE Pmaxi<SBC, SIZE PROVIDED IS SAFEDL+IL+EQXPii/A 271.61 kN/m2Mxii/Zxx 17.64 kN/m2Mzii/Zzz 100.10 kN/m2

Pmaxii 389.35 kN/m2 Pminii 153.86 kN/m2SINCE Pmaxii<1.25SBC, SIZE PROVIDED IS SAFE

DL+IL+EQZPiii/A 269.75 kN/m2Mxiii/Zxx 17.82 kN/m2Mziii/Zzz 84.73 kN/m2

Pmaxiii 372.30 kN/m2Pminiii 167.20 kN/m2SINCE Pmaxiii<1.25SBC, SIZE PROVIDED IS SAFE

fck

fy

kN/m2

lpz

bpx

hp

Lz

Bx

m2

Zxx m3

Zzz m3

Ws

Wf

file:///tt/file_convert/5695d0bf1a28ab9b0293b80a/document.xls

InfoMile SolutionsClient: S.V.POWER PVT LTD Date: 15.09.2008

Project: 500 TPH CFBC BOILER Done by: AKVJob Title: Design of Footing Checked by:Building: COMPRESSOR BUILDING Rev: 0

Reference Description of Problem Values Units

371.71Mx

X

Mz

Z 311.651.50 0.6

0.30

1.20171.50

251.93 287.57

274.21

Moments at the face of Pedestal:Moment about X-direction 35.61 kNm

(Mxu = 1.5*Mx) 0.46 MPaSP16, Design aids to Percent of Steel required pt 0.12 % IS:456-2000 Area of steel required/m 408.00

Provided Diameter of bar # 12 4.00Spacing required 250.00 mm

cl. 26.3.3.b.1 & 2 of Check for max. spacing 250.00 mm IS:456-2000 Provide #12mm bars @ 200mm

Moment about Z-direction 28.67 kNm(Mzu = 1.5*Mz) 0.37 MPa

SP16, Design aids to Percent of Steelrequired pt 0.12 % IS:456-2000 Area of steel required/m 408.00

Provided Diameter of bar # 12 4.00Spacing required 250.00 mm

Cl. 26.3.3.b.1 & 2 of Check for max. spacing 250.00 mm IS:456-2000 Provide #12mm bars @ 200mm

Check for Shear:Pr. at d diatance from face 284.30 357.03 kN/m2Shear For both directions 29.49 kN 33.07 kNMaximum Shear Force V 33.07 kNζv = Vu/bd (Vu = 1.5*V) ζv 0.15 MPaAvailable steel Area 565.49Percent of steel provided 0.17 %For the above % of steel

Table 19 of IS:456-2000 Design Shear strength ζc 0.35 MPa Since ζc > ζv, Safe One Way Shear

Mx

Mxu/bd2

Ast mm2

Mz

Mzu/bd2

Ast mm2

kN/m2

mm2

file:///tt/file_convert/5695d0bf1a28ab9b0293b80a/document.xls

InfoMile SolutionsClient: S.V.POWER PVT LTD Date: 15.09.2008

Project: 500 TPH CFBC BOILER Done by: AKVJob Title: Design of Footing Checked by:Building: COMPRESSOR BUILDING Rev: 0

Reference Description of Problem Values UnitsPunching ShearPunching Resistance 895.33 kNPunching resistance is > 392.16 kNHence Safe in Punching ShearShrinkage reinforcement at top:

Cl. 26.5.2.1 of IS:456-2000 Minimum Area of steel 408.00Provided Diameter of bar # 10 78.54

Spacing required 192.50 mm Provide #10mm bars @ 250mm

Final Results:Provide Size of the Footing: 1200 x 1500 x 400mmBottom Main reinforcement about X-Direction: Provide #12mm bars @ 200 c/cBottom Main reinforcementabout Z-Direction: Provide #12mm bars @ 200 c/cShrinkage reinforcement at top: Provide #10mm bars @ 250 c/c

mm2

mm2