These are from Ontario building code Division B part 9:
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9.23.9.9. Cantilevered Floor Joists
(1) Floor joists supporting roof loads shall not be cantilevered more than 400 mm beyond their supports where 38 mm
by 184 mm joists are used and not more than 600 mm beyond their supports where 38 mm by 235 mm or larger joists are
used.
(2) The cantilevered portions referred to in Sentence (1) shall not support floor loads from other storeys unless
calculations are provided to show that the design resistances of the cantilevered joists are not exceeded
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9.17.3. Steel Columns
9.17.3.1. Size and Thickness
(1) Except as permitted by Sentence (2), steel pipe columns shall have an outside diameter of not less than 73 mm and a
wall thickness of not less than 4.76 mm.
(2) Columns of sizes other than as specified in Sentence (1) are permitted to be used where the loadbearing capacities
are shown to be adequate.
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Question:
Is engineer's involvement required to meet 9.23.9.9.(2) or 9.17.3.1.(2), or a designer who is qualified to design part 9 building is permitted to do the calculation?
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9.23.9.9. Cantilevered Floor Joists
(1) Floor joists supporting roof loads shall not be cantilevered more than 400 mm beyond their supports where 38 mm
by 184 mm joists are used and not more than 600 mm beyond their supports where 38 mm by 235 mm or larger joists are
used.
(2) The cantilevered portions referred to in Sentence (1) shall not support floor loads from other storeys unless
calculations are provided to show that the design resistances of the cantilevered joists are not exceeded
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9.17.3. Steel Columns
9.17.3.1. Size and Thickness
(1) Except as permitted by Sentence (2), steel pipe columns shall have an outside diameter of not less than 73 mm and a
wall thickness of not less than 4.76 mm.
(2) Columns of sizes other than as specified in Sentence (1) are permitted to be used where the loadbearing capacities
are shown to be adequate.
--------------------------------------------------------------------------------------------------------------------------------------
Question:
Is engineer's involvement required to meet 9.23.9.9.(2) or 9.17.3.1.(2), or a designer who is qualified to design part 9 building is permitted to do the calculation?