S-2.1, r. 4 - Safety Code for the construction industry

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3.24.14. Stacks of shims: Each column that stands on concrete foundations must rest on at least 2 stacks of shims of at least 9 in2 and located near the anchor rods, unless another levelling device offering equivalent safety is provided for in the erection plan.
O.C. 391-2011, s. 2.