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