Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.
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The Ontario Building Code | Design of Adjustable Steel Columns

9.17.3.4. design of Adjustable Steel columns

(1) Where the imposed load does not exceed 36 kN, adjustable steel columns shall conform to CAN/cgsb-7.2, "Adjustable Steel columns".

(2) Adjustable steel columns other than those described in Sentence (1) shall be designed in accordance with Part 4.

9.17.4. wood columns

In Plain Language

Adjustable steel columns (often called steel jack posts) must be designed as set out in this article, addressing this common adjustable support product.

This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.