Panel 5 (PDF)

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Design Calculations
ONE-WAY SPANNING SLAB (PANEL 5)
12.92 N/mm2

BS 8110

2225

Output

mm

Depth of slab
Span of Slab

150 mm
2225 mm
2
25 N/mm
2
410 N/mm
25 mm
12 mm
3
2400 kg/m
119 mm

Characteristic strength of concrete
Characteristic strength of steel
Concrete Cover
Diameter of Main bar

3.4.4.4

Concrete Density
Effective Depth
LOADING
Slab Self Weight
Partition allowance
Finishes
Total Dead load
Imposed Load
Ultimate Dead Load
Moment
K=
Lever arm, z,





3.6
1.2
1.0
5.8
3
12.92
8.00







Area of steel required,
Provide

0.0226



Y

12 at



250
452.6



kNm

0.95 d
113.05 mm

M
0.95 f y z



A
s

N/mm2
N/mm2
N/mm2
N/mm2
N/mm22
N/mm

181.57



Minimum reinforcement area
195
Distribution Reinforcement
100
0.13%
ℎ As(req)
195

a
t
Provide
12
250
Y
452.57
Deflection Check
Basic
26





Table 3.9





Moment redistribution factor
Tension reinforcement area provided
Tension reinforcement area required
fs

Design service stress



Table 3.10

3.12.11.2.7



Modification factor
Permissible
Actual
Crack Check
Allowable crack width









2 f y Asreq

0.56
0.55

3Asprov

*

1
b

(477  fs )
 2.0
M
)
bd2

120(0.9 



109.66 N/mm2
2.00

52.00
18.70





1.0
452.57
181.57

3d

OK
357

OK