When I was an apprentice in a BMC car garage in the early sixties,(remember BMC ?),everyone used the same torque wrench for everything and it was never checked for calibration, and we never sheared any bolts off that I can remember.Bolt torques are within 10% either way anyway as the conditions of the fasteners can vary so much, as in dry,rusty,oily,greased threads etc.I still have my torque wrenches collected over the years, there are 5 in total ranging from1/4” drive up to 3/4” drive.We used to recondition R.R. Diesels that were in shunting locomotives, on one particular engine the main bearing bolts were tightened to1000ft.lbs.and I had to use a double barrelled 1” drive torque wrench and as I wasn't strong enough to go to 1000 ft.lbs.,I used to turn the engine on its side using the roll over assembly stand and use the overhead crane instead as the torque wrench had a welded on loop just for this purpose.