As I believe, the Qatar Govt.has already announced the ban in working hours from 15/06/2009 to 31/08/2009 between 11.30am and 3.00pm under the sun.And this was published in news papers already.

As everybody knows the temperature now itself goes morethan 50 degree celcius,it is the individual construction companies or the concerned management who have to decide to prepone the timings nowitself based on the welfare of construction workers at site.