rcc design spreadsheet
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Use of BuildingFloor HeightHeight of PlinthDepth of FoundationLive LoadFloor FinishRoofInterior wall thicknessExterior wall thicknessConcrete GradeMain Steel GradeSecondary Steel GradeBearing capacity of soilExposure condition
INFORMATION INPUTS
Insert the type of Panel 1Length of the Shorter Span (c/c distance in mm), Lx 3000Length of the Longer Span (c/c distance in mm), Ly 6000Thickness of the ceiling plaster (mm)Floor Finish (in kN/m^2) 1weight of light weight partition (kN/m^2)Live Load (KN/m2) 4Unit weight of Concrete used (KN/m^3) 25Charactristic Strength of Concrete used (MPa) 20Charactristic Strength of Steel used (MPA) 415Enter the min clear cover you want to provide (in mm) 20
Thickness of External Walls (in mm) 230Thickness of Internal Wall (in mm) 150Bearing Capacity of Soil (in kN/m^2) 200
Ly/Lx 2Floor Height (in mm) 3350
Unit weight of Masonry used (KN/m^3) 20
IT IS A ONE WAY SLAB
Effective DepthData Value
Assuming percentage of steel (in %) 0.4Assumed diameter of bars (in mm) 10
Fs(in N/mm2) 240.7Modification Factor (M.F.) 1.33
Type of Span One Way Continuous SlabCoeffient for type of slab (IS 456: 2000) 26
86.755349913244790
115
Effective Spanc/c span 3000
Width of support (in mm) 230Clear Span (in mm) 2770
1/12 th of Clear Span (in mm) 230.833333333333
Check for effective span (IS 456:2000, Pg 35, cl.22.2)
Effective Span (in mm) 2860
Required Effective Depth, dreq
Provided Effective Depth, dprov
Overall Depth, Dprov
Use lesser value of c/c distance & clear span+d
Load Calculations
Dead LoadSelf Wt. of Slab (in kN/m) 2.875
Floor finish for 1 mt. length (in kN/m) 1Dead Load (in kN/m) 3.875
Factored Dead Load (in kN/m) 5.8125Live Load
Live Load (in kN/m) 4Factored Live load (in kN/m) 6
Bending Moment Calculations
At SupportsSupport Condition Interior Supports
Dead Load Coefficent (IS 456:2000) - 1/12Live Load Coefficient (IS 456:2000) - 1/9
-3.96-5.45
Total Moment at Support (in kN/m) -9.42At Span
Span Type Near Middle of End SpanDead Load Coefficent (IS 456:2000) 1/12Live Load Coefficient (IS 456:2000) 1/10
3.964.75
Total Moment at Span (in kN/m) 8.72
Main Reinforcement
At Selected SupportPt (in %) 0.347096644159568
312.386979743611
295.679308573157
16.7076711704541
8
Provided c/c Spacing of extratop reinforcement 100050.2654824574367
At Selected Span
Pt (in %) 0.319358462216096287.422615994486
Diameter of steel bars to be provided (in mm) 8Provided c/c Spacing of reinforcement 170
295.679308573157
MDL (in kN/m)MLL (in kN/m)
MDL (in kN/m)MLL (in kN/m)
Total Ast req ( in mm^2)
Ast already available at the support from selected span( in mm^2)
Ast req after deduction ( in mm^2)
Diameter of extratop reinforcement bars to be provided (in mm)
Ast prov as extratop reinforcement ( in mm^2)
Ast req ( in mm^2)
Ast prov ( in mm^2)
Distribution Steel
Provide minimum % of steel of bD 0.12138
Diameter of steel bars to be provided (in mm) 8Provided c/c Spacing of reinforcement 360
139.626340159546
Ast req ( in mm^2)
Ast prov ( in mm^2)
No Type of Panel1 Interior Panel
2 One Short Edge Discontinuous
3 One Long Edge Discontinuous
4 Two Adjacent Edges Discontinuous
5 Two Short Edges Discontinuous
6 Two Long Edges Discontinuous
7Three Edges Discontinuous(one long edge continuous)
8Three Edges Discontinuous(one short edge continuous)
9 Four Edges Discontinuous
10 Cantilever
Type of PanelInterior Panel
One Short Edge DiscontinuousOne Long Edge Discontinuous
Two Adjacent Edges DiscontinuousTwo Short Edges DiscontinuousTwo Long Edges Discontinuous
Three Edges Discontinuous(one long edge continuous)Three Edges Discontinuous(one short edge continuous)
Four Edges Discontinuous
Cantilever
INFORMATION INPUTS
Assumed width of beam (in mm) 230Assumed depth of beam (in mm) 300
Assumed width of column (in mm) 300Assumed breadth of column (in mm) 300No. of Slabs trasferring load on beam 2
Please Enter Overall Depth of Slab (in mm)Type of Beam Main BeamType of Slab 1 One Way SlabType of Slab 2 One Way Slab
Floor Finish (in kN/m^2)Live Load (in kN/m^2)
Orientation of Beam to be Designed Parallel to Ly
Load Calculation
Self Wt. of Slab (in kN/m^2) 2.875Floor Finish (in kN/m^2) 1Dead Load (in kN/m^2) 3.875Live Load (in kN/m^2) 4
Dead Load CalculationDead Load from Slab(s) (in kN/m^2) 11.625
Masonry wall (in kN/m) 9.15Self Wt. of beam rib (in kN/m) 1.06375
Total Dead Load (in kN/m) 21.83875Factored Dead Load (in kN/m) 32.758125
0.75*DL 24.56859375Live Load Calculation
Live Load (in kN/m) 12Factored Live Load (in kN/m) 18
Total Load on BeamTotal Load on Beam (in kN/m) 50.758125
Is L.L. < 0.75*D.L. ? TRUE
Length of the Shorter Span of Slab 1 (c/c distance in mm), Lx1
Length of the Longer Span of Slab 1 (c/c distance in mm), Ly1
Length of the Shorter Span of Slab 2 (c/c distance in mm), Lx2
Length of the Longer Span of Slab 2 (c/c distance in mm), Ly2
INFORMATION
Load Calculations
Type of ColumnEnter No. of Floors of Building
Roof (Terrace Slab)
Live load (in kN/m^2)Overall Depth of Slab Provided (in mm)
Self Weight of slab (in kN/m^2)Roof finish (in kN/m^2)Total load (in kN/m^2)
Factored load (in kN/m^2)
Typical floorLive load (in kN/m^2)
Overall Depth of Slab Provided (in mm)Self Weight of slab (in kN/m^2)
Floor finish (in kN/m^2)Total load (in kN/m^2)
Factored load (in kN/m^2)
Walls
Weight of internal wall (kN/m)Factored weight of internal wall (in kN/m)
Weight of Exterior wall (kN/m)Factored weight of Exterior wall (in kN/m)
Total Weight of Walls (in kN/m)
Main Beam
Breadth of Beam (in mm)Depth of Beam (in mm)
Rib of Beam (in mm)Weight of Main Beam (in kN/m)
Factored weight of Main Beam (in kN/m)
Secondary Beam
Breadth of Beam (in mm)Depth of Beam (in mm)
Rib of Beam (in mm)Weight of Secondary Beam (in kN/m)
Factored weight of Secondary Beam (in kN/m)
Length of Walls, Main Beam & Secondary Beam
No. of Slabs tranferring Weight on the Column to be designedEnter Slab details in Clockwise Direction of Slabs (Start from Top Left Slab)
Length of Slab 1 on X - Axis (in m)Length of Slab 1 on Y - Axis (in m)Length of Slab 2 on X - Axis (in m)Length of Slab 2 on Y - Axis (in m)Length of Slab 3 on X - Axis (in m)Length of Slab 3 on Y - Axis (in m)Length of Slab 4 on X - Axis (in m)Length of Slab 4 on Y - Axis (in m)
Floor Area transferring Load on Column (in m^2)Length of Walls (in m)
Length of Main Beam (in m)Length of Secondary Beam (in m)
Load on Column
Roof and (n-1)th floorRoof slab (in kN)
Walls (in kN)Main Beams (in kN)
Secondary Beams (in kN)Total (in kN)
(n-1)th and (n-2)th floorFloor slab (in kN)
Walls (in kN)Main Beams (in kN)
Secondary Beams (in kN)Total from (n-1)th to (n-2)th floor (in kN)
Loads from Upper Floor (in kN)Total load (in kN)
1st Floor and PlinthTotal Load from Upper Floors to Plinth (in kN)
Column between Plinth and FootingFloor Slab at Plinth? (By default no Floor Slab)
Considering only Plinth Beams, no WallsWeight of Main Plinth Beams (in kN)
Weight of Secondary Plinth Beams (in kN)Weight of Column (in kN)
Floor slab (in kN)
Total Load on Footing (in kN)
INPUTS
Load Calculations
Interior Column4
Roof (Terrace Slab)
1.5135
3.3751.5
6.3759.5625
Typical floor4
1353.375
18.375
12.5625
Walls
8.713.05
Not RequiredNot Required
13.05
Main Beam
230450315
1.811252.716875
Secondary Beam
230300165
0.948751.423125
Length of Walls, Main Beam & Secondary Beam
4Enter Slab details in Clockwise Direction of Slabs (Start from Top Left Slab)
64646666
30 To be done14 To be done11 To be done
3 To be done
Load on Column
Roof and (n-1)th floor286.875
182.729.885625
4.269375503.73
(n-1)th and (n-2)th floor376.875
182.729.885625
4.269375593.73503.73
1097.46
1st Floor and Plinth2284.92
Column between Plinth and FootingNo
29.8856254.269375
6.75Not Required
2325.825
INFORMATION INPUTS
Total Factored Load on Footing (in kN)Breadth of Column (in mm), b 300Width of Column (in mm), D 600
Bearing Capacity of soil (in kN/m^2) 200Charactristic Strength of Concrete used (MPa) 20Charactristic Strength of Steel used (MPA) 415
Size of Footing
Design working Load (in kN) 1550.55Assume Dead Load of Footing as 10% of Column Load (in kN) 155.055
Total Working Load (in kN) 1705.605Area of Footing Required (in m^2) 8.528025
Difference between dimensions of column (in m) 0.3Breadth of footing required (in m) 2.77412807517044Width of footing required (in m) 3.07412807517044
2.83.1
Area of Footing Provided (in m^2) 8.68
Net Upward Pressure (p)
Net Upward Pressure, p (in kN/m^2) 267.952188940092
Bending Moment
U.D.L. along X - direction (in kN/m) 750.266129032258U.D.L. along Y - direction (in kN/m) 830.651785714285
Length for Critical Section of Footing (in m) 1.25586.145413306451648.946707589286
Depth of Footing
Assume offset provide (in mm) 75Width of Resisting Section for X - direction (in mm) 750Width of Resisting Section for Y - direction (in mm) 450
559.911443821575686.976510289525
Try Overall Depth (in mm) 800
Provided Breadth of footing (in m), bprov
Provided Width of footing (in m), dprov
Muy
Mux
dx req(in mm)dy req(in mm)
Assumed diameter of reinforcement bars provided (12mmф by default)
744732
Average Depth (in mm) 738Assumed edge depth (by default 230mm) (in mm)
Reinforcement along X - Axis
Pt required (in %) 0.777512603.11357231209
No. of Bars Required of Assumed Diameter 242714.33605270158
Check for Cracking
Reinforcement along Y - Axis
Pt required (in %) 0.4991885312835422740.54503674664
No. of Bars Required of Assumed Diameter 252827.43338823081
dx prov(in mm)dy prov(in mm)
Ast required (in mm^2)
Ast provided (in mm^2)
Ast required (in mm^2)
Ast provided (in mm^2)
fy xumax/d Dia of bar No. of bar250 0.53 10 1415 0.48 12 2500 0.46 16 3
18 420 522 624 728 832 9
101214
Modification Factor
FsPt & Mf
120Pt 0 0.2 0.4 0.6 0.8 1 1.2 1.4Mf 2 2 2 2 1.8 1.6 1.5 1.4
145Pt 0 0.2 0.4 0.6 0.8 1 1.2 1.4Mf 2 2 2 1.8 1.57 1.42 1.34 1.28
190Pt 0 0.2 0.4 0.6 0.8 1 1.2 1.4Mf 2 2 1.7 1.42 1.29 1.2 1.15 1.1
240.7Pt 0 0.1 0.15 0.2 0.4 0.6 0.8 1Mf 2 2 1.84 1.71 1.33 1.15 1.07 1
290Pt 0 0.2 0.4 0.6 0.8 1 1.2 1.4Mf 2 1.4 1.12 0.98 0.9 0.85 0.8 0.78
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Percentage tension reinforcement
Mod
ifica
tion
Fact
or
Type of Span CantileverSimply Supported
Continuous
Table 12 Bending Moment Coefficents (Cl. 22.5.1)
Type of Load Span Moment Suppor MomentNear Middle of End Span At Middle of Interior Span At Support Next to the End Support
1/12 1/16 - 1/10
1/10 1/12 - 1/9
Dead load and imposed load (fixed)
Imposed load (not fixed)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Percentage tension reinforcement
Mod
ifica
tion
Fact
or
Table 13 Shear for Coefficients (Cl. 22.5.1 and 22.5.2)
Type of Load At End SupportAt Support Next to the End Support
Outer Side Inner Side
0.40 0.60 0.55
0.45 0.60 0.60
Dead load and imposed load (fixed)
Imposed load (not fixed)
Modification FactorPt & Mf
1.6 1.8 2 2.2 2.4 2.6 2.8 31.35 1.3 1.25 1.2 1.17 1.15 1.1 1.0951.6 1.8 2 2.2 2.4 2.6 2.8 3
1.21 1.16 1.12 1.1 1.08 1.05 1.02 11.6 1.8 2 2.2 2.4 2.6 2.8 3
1.05 1 0.97 0.93 0.92 0.91 0.9 0.891.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8
0.95 0.91 0.88 0.84 0.83 0.82 0.81 0.8 0.81.6 1.8 2 2.2 2.4 2.6 2.8 3
0.74 0.71 0.7 0.69 0.685 0.68 0.675 0.67
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Percentage tension reinforcement
Mod
ifica
tion
Fact
or
span <=10 mt span >10 mt Note for Two way slabs: Pg 39 7 Not Applicable
20 Not Applicable Not Applicable26 Not Applicable Not Applicable
Table 12 Bending Moment Coefficents (Cl. 22.5.1)
Suppor Moment At Support Next to the End SupportAt Support Next to the End Support At Other Interior Supports Interior Supports
- 1/10 - 1/12
End Support
- 1/9 - 1/9
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Percentage tension reinforcement
Mod
ifica
tion
Fact
or
Table 13 Shear for Coefficients (Cl. 22.5.1 and 22.5.2)At End Support
At Support Next to the End SupportAt All Other Interior Supports Outer Side of Support Next to the End Support
Inner Side Inner Side of Support Next to the End Support
0.55 0.50 At Interior Supports
0.60 0.60
Modification FactorPt & Mf
Fs Mf Pt120 2 0.4145 2 0.4190 1.7 0.4
240.7 1.33 0.4290 1.12 0.4
30.8
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Percentage tension reinforcement
Mod
ifica
tion
Fact
or
At Support Next to the End Support Near Middle of End SpanAt Middle of Interior SpanEnd Support
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Percentage tension reinforcement
Mod
ifica
tion
Fact
or
At End SupportOuter Side of Support Next to the End SupportInner Side of Support Next to the End SupportAt Interior Supports
Charactristic Strength of Concrete used (MPa)
1520253035404550
Characteristic Strength of Steel used (MPA)250415500
dia ast8 8 50.26548
10 8 50.265481216182022
1 Main Beam2 Secondary Beam
One Way SlabTwo Way Slab
Parallel to LxParallel to Ly
Beta 1 #DIV/0!Beta 2 #DIV/0!
0.1480.1380.133
Interior ColumnExterior Column not at CornerExterior Column at CornerColumn at L Shaped Joint
YesNo
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