They can take pictures all they want when they sneak out of their air conditioned trailers to make an appearance. We were hanging sheet gerts on a roof about 3 weeks ago, the panels on the steel would get so hot you could not kneel on it. They shot the underside with a temp gun on a cool day(low 90's) and the roof was 140 degrees. We were up there and the temp was 99 with a heat index of 108-111. We'd climb into the shade and tie off and sit on some cross braces with a 60ft drop or better right below us. For some reason there was a breeze there. We'd take a break, drink some gatorade, smoke and watch the action below. Luckily the GC on the job was aware of the heat and would tell us each week at the safety meetings, don't kill your guys or yourselves, we need to get done but it ain't worth dying over.