Piping Offsets require a specialized application of trigonometry. The application in piping is simplified by the fact that we mostly use only a few angles, 22-1/2, 30, 45, and 60 with 45 being the most common angle of fittings. In the case of 45 it is easy to remember the necessary constants, 1.414 and .707.
But if you remember 1.414 solve most of the offset related calculations.
Continue with the WHMIS GHS assignment and watch for the labels on all products you use. What type of information should you expect on a label.
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