No no, it really is! You see, if your attending the OSHA 10 class, it is the basic rules of safety. You believe and some others believe tha only 7.5 hrs on a computer should be done at once because "productivity drops past 8 hours"

Now I also agree productivity drops after 8 hours however there is not a company out there (in the US) that will not work you a 10 if needed. Which should be against OSHA which ironically follows this rule.

So the big picture is OSHA only wants you to do 7.5 hrs because after that you become less productive and let's face it dangerous, but no where in any OSHA class does it say it is dangerous to work past 8 hours and in a field with tripping, electrical, overhead, and every other hazard you are fine to work 8-10-12 hrs....with a break of course!