I work in what we call a construction support industry. I either supervise, or perform various inspection services to builders, or contractors. I respond to calls from about 6 am to 6PM, 5 days a week, with the occasional saturday if the job/ client requires it, very rare to work Sunday. Sometimes, a concrete contractor will do a floor slab starting at 1 or 2 am, to beat the sun and heat, but thats unusual.
Availible for work--typically 24/ 6 1/2
Actually time charged averages 50 hr, but has been twice that.