The Ontario Building Code | Grade
9.26.10.8. Grade
(1) Shakes shall be not less than No. 1 or Handsplit grade.
9.26.11. Built-Up Roofs
9.26.10.8. Grade
(1) Shakes shall be not less than No. 1 or Handsplit grade.
9.26.11. Built-Up Roofs
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