The Ontario Building Code | Stud Wall Reinforcement

3.3.4.9. stud wall Reinforcement

(1) If wood wall studs or sheet steel wall studs enclose the main bathroom in a dwelling unit, reinforcement shall be installed to permit the future installation of the following:

(a) for a water closet, a grab bar described in Clauses 3.8.3.8.(3)(a) and a grab bar described in Clause 3.8.3.8.(3)(c),

(b) for a shower, a grab bar described in Clause 3.8.3.13.(2)(f), and

(c) for a bathtub, a grab bar described in Clause 3.8.3.13.(4)(c).