Design of RCC Combined...
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Prepared by : Date : Job No. : Sheet :
Cont'd :
Verified by : Date : Revision Notes :
Project :
Subject : Description :
CALCULATION
P1 m P2
S
R kn
x e m
L m
Column Information
Column b (mm) h (mm) P d (Kn) P l (Kn) Eccentricity of Ext. Column
External Spacing(m) x m
Internal e m
* N.B : Loads above are service.
Soil Information Pu = 1.4 * Pd + 1.7 * Pl
q all (Kg/cm2) D f (m)
Reaction for footing
Design Strength Values External Internal
F y ( MPa) F c' ( MPa) P 1 1237 Kn P 2 2900 Kn
P1u 2002 Kn P2u 4480 Kn
Footing Proportions Checking for Shear
Area req. 20.685 m2 One-Way Action Punching Shear
Length(L) 5.767 m External Internal External Internal
Width req. 3.5868 m Vc= 1815.7 Vc= 1815.7 Vc= 3480.1 Vc= 4640.1
Width pro. 3.60 m Vu = 23.653 Vu = 1212.7 Vu= 2001.8 Vu= 4480
Area pro. 20.761 m2
THICKNESS 700 mm
Shear & Moment Calculation
V1 910.4 Kn M1 368.7 Kn.m.
V2 -1091 Kn M2 -161.2 Kn.m.
V3 2280 Kn M3 2152 Kn.m.
V4 -2200 Kn
DESIGN OF FOOTING(LONG REINF.) DESIGN OF FOOTING(SHORT REINF.)
Mu ρρρρ As rq Reinforcement As pr Mu ρρρρ As rq Reinforcement As pr Distance
Kn.m (%) (cm2) (cm2) Kn.m (%) (cm2) (bottom) (cm2) (m)
368.7 0.07 82 27 ΦΦΦΦ 20 84.82 668 0.287 39.9 13 ΦΦΦΦ 20 40.84
-161 0.03 81.9 27 ΦΦΦΦ 20 84.82 1495 0.56 63.79 21 ΦΦΦΦ 20 65.97
2152 0.42 98.33 32 ΦΦΦΦ 20 100.5 Shrinkage bars 4 ΦΦΦΦ 20 10.8 per meter
SUMMARY DESIGN OF FOOTING
L B T SHORT REINF. LONG REINF. LONG REINF. REMARKS
m m m (under columns) ( bottom) ( top)
5.767 3.6 0.7 13 ΦΦΦΦ 20 27 ΦΦΦΦ 20 32 ΦΦΦΦ 20
21 ΦΦΦΦ 20
SHRINKAGE
( top & bottom / m)
4 ΦΦΦΦ 20
1.9
1.9
Prep By : A B Quadri- Abq Consultants - 9959010210 - [email protected]/2 Royal Residency, Besides Amba talkies, Mehdipatnam , Hyderabad-India. 500028-w.abqconsultants.com
Vc > V u Vc > V u
O.K. O.K. O.K. O.K.
Vc > V u
2.00 2.00
410 30
Vc > V u
2.073
0.81 m
700
2.073 y (1.96 m )
5.767
500 500 337 900 0.810
500 500 1500 1400 3.00
4137
3.00
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This program Designs and
Optimises RCC Combined
Footings.
Written and programmed by
:-
A B Quadri
www.abqconsultants.com
9959010210
9959010211
Prepared by : Date : Job No. : Sheet :
Cont'd :
Verified by : Date : Revision Notes :
Project :
Subject : Description :
CALCULATION
Shear & Moment DiagramShear & Moment DiagramShear & Moment DiagramShear & Moment Diagram
Kn Kn
&
Longitudunal ReinforcementLongitudunal ReinforcementLongitudunal ReinforcementLongitudunal Reinforcement
27272727 Ø 20202020
27272727 Ø 20202020 1124112411241124 Kn/m 32323232 Ø 20202020
V3V3V3V3 2280 kn
V1V1V1V1 910 kn
cg
Shear DiagramShear DiagramShear DiagramShear Diagram
V2V2V2V2 kn V4V4V4V4 kn
M2M2M2M2 kn.m
M1M1M1M1 kn.m Moment DiagramMoment DiagramMoment DiagramMoment Diagram M3M3M3M3 kn.m
13131313 Ø 20202020 21212121 Ø 20202020
4444 Ø 20202020 / met length
Footing Plan ( Short Reinforcement)
Prep By : A B Quadri- Abq Consultants - 9959010210 - [email protected]/2 Royal Residency, Besides Amba talkies, Mehdipatnam , Hyderabad-India. 500028-w.abqconsultants.com
Shrinkage r/f @ top & bot
500 in areas not indicated. 500
3600
500
500
950 950 950 950
5767
1900 1900
0.97 m 1.96 m
0.81 m 2.03 m
-1091 -2200
-161.19
368.71 2152.27
@ bottom @ bottom
0 0
2002200220022002 4480448044804480
