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Project 132/11kV Laboucity s/s Date Page
Client DUBAI ELECTRICITY & WATER AUTHORITY Made ASV Checked MMN
Contractor EEE Rev. No. Approved VRP
Structure Main building Rev.Date
Calculation of reinforcement in screed : (From BS8007 : 1987 )
IF h > 500
250
h
100
IF h <500
h/2
hh/2
Surface Zones on ground floor slabs
Ch t i ti t th f t F 40 N/ ²
DEWA
Characteristic strength of concrete F cu = 40 N/mm²Characteristic strength of steel F y = 460 N/mm²ℓcrit For 460 grade concrete = fct/fy Clause :A2
Direct tensile strength on immature concrete fct = 1.5 For Fc 40ℓcrit For 460 grade concrete = 0.00326
Minimum reinforcement = Table A:1
Screed thickness = 1000 mmHence Depth d = 250 mmMinimum reinforcement 0.6*250*0.0032 = 489.13 mm2
Number of bars in 1 m length = 5 No'sProvided area of reinforcement in one direction = 251 mm2
Provided area of reinforcement in two direction = 502 mm2 safe
0.6*d*ℓcrit