4.2.3.

(1) Wood used in foundations or in support of soil or rock shall conform to the appropriate requirements of Subsection 4.3.1.

(1) Wood exposed to soil or air above the lowest anticipated groundwater table shall be treated with preservative in conformance with CSA O80 Series, “Wood Preservation”, and the requirements of the appropriate commodity standard as follows:

(a) CSA-O80.2, “Preservative Treatment of Lumber, Timber, Bridge Ties and Mine Ties by Pressure Processes”,

(b) CSA-O80.3, “Preservative Treatment of Piles by Pressure Processes”, or

(c) CSA-O80.15, “Preservative Treatment of Wood for Building Foundation Systems, Basements and Crawl Spaces by Pressure Processes”.

(2) Where timber has been treated as required in Sentence (1), it shall be cared for as provided in AWPA-M4, “Care of Preservative-Treated Wood Products”, as revised by Clause 6 of CSA O80 Series, “Wood Preservation”.

(1) Plain or reinforced masonry used in foundations or in support of soil or rock shall conform to the requirements of Subsection 4.3.2.

(1) Where plain or reinforced masonry in foundations or in structures supporting soil or rock may be subject to conditions conducive to deterioration, protection shall be provided to prevent such deterioration.

(1) Plain, reinforced or prestressed concrete used in foundations or in support of soil or rock shall conform to the requirements of Subsection 4.3.3.

(1) Where concrete in foundations may be subject to chemical attack, it shall be treated in conformance with the requirements in CAN/CSA-A23.1, “Concrete Materials and Methods of Concrete Construction”.

(1) Steel used in foundations or in support of soil or rock shall conform with the appropriate requirements of Subsections 4.3.3. or 4.3.4., unless otherwise specified in this Section.

(1) Where steel piles are used in deep foundations and act as permanent load-carrying members, the steel shall conform with one of the following standards:

(a) ASTM A252, “Welded and Seamless Steel Pipe Piles”,

(b) ASTM A283 / A283M, “Low and Intermediate Tensile Strength Carbon Steel Plates”,

(c) ASTM A1008 / A1008M , “Steel, Sheet, Cold Rolled, Carbon, Structural,High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability”,

(d) ASTM A1011 / A1011M, “Steel, Sheet and Strip, Hot Rolled, Carbon, Structural, High Strength Low Alloy and High Strength Low Alloy with Improved Formability”, or

(e) CAN/CSA-G40.21, “Structural Quality Steel”.

(1) Where high strength steel is used for tendons in anchor systems used for the permanent support of a foundation or in the erection of temporary support of soil or rock adjacent to an excavation, it shall conform with the requirements of CAN/CSA-A23.1, “Concrete Materials and Methods of Concrete Construction”.

(1) Where conditions are corrosive to steel, adequate protection of exposed steel shall be provided.