Construction codes of Ontario

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Lumber Grades

Lumber Grades (1) Except for joists, rafters, trusses and beams, visually graded lumber shall conform to the grades in Table 9.3.2.1. Article 9.3.2.2 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.

Lumber Grades

Lumber Grades Each piece of construction lumber is examined and assigned a grade depending on its physical characteristics such as the size and location of knots and the slope of the grain. The assigned grade is an estimate of its strength. Softwood lumber species having similar strength properties may be combined into a single-species combination […]

Lumber Subflooring

Lumber Subflooring (1) Lumber subflooring shall be laid at an angle of not less than 45° to the joists. (2) Lumber subflooring shall be fully supported at the ends on solid bearing. (3) Lumber for subflooring shall be of uniform thickness and not more than 184 mm wide Article 3.4.5.9 Ontario Regulation 332/12 Building Code, Information […]

Lumber Wall Sheating

Lumber Wall Sheating (1) Lumber wall sheathing shall be applied so that all ends are supported. (2) Where lumber wall sheathing is required to provide bracing according to Article 9.23.10.2., it shall be applied with end joints staggered. Article 9.23.16.4. Ontario Regulation 332/12 Building Code, O. Reg. 332/12: BUILDING CODE (ontario.ca) © Queen’s Printer for […]

Masonry Support

Masonry Support (1) All masonry shall be supported on masonry, concrete or steel, except that masonry veneer walls are permitted to be supported on foundations of wood frame constructed in conformance with Sentence 9.15.2.4.(1). (2) Every masonry wall shall be at least as thick as the wall it supports, except as otherwise permitted in Article 9.20.12.2. […]

Materials and Thickness Panel-type underlay

Materials and Thickness Panel-type underlay (1) Panel-type underlay shall be not less than 6 mm thick and shall conform to, (a) ANSI A208.1, “Particleboard”, (b) CAN/CGSB-11.3-M, “Hardboard”, (c) ANSI/HPVA HP-1, “Hardwood and Decorative Plywood”, (d) CSA O121, “Douglas Fir Plywood”, (e) CSA O151, “Canadian Softwood Plywood”, (f) CSA O153, “Poplar […]

Materials for Flashing

Materials for Flashing (1) Materials used for flashing shall conform to Table 9.20.13.1. (2) Aluminum flashing in contact with masonry or concrete shall be effectively coated or separated from the masonry or concrete by an impervious membrane. Article 9.20.13.1 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.