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Need clarification on Ontario building code for guardrails

Discussion in 'Canada' started by mhorton, Dec 16, 2019.

  1. mhorton

    mhorton Registered User

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    I'm trying to understand what is meant by section 3.3.1.17 'Guards' of the Ontario Building Code.

    link to building code: http://www.buildingcode.online/328.html

    Where it states:
    "openings through any guard that is required by Sentence (1) shall be of a size that will prevent the passage of a sphere having a diameter more than 100 mm unless it can be shown that the location and size of openings that exceed this limit do not represent a hazard."

    Can someone clarify if this is referring to just the vertical member spacing of the guardrail or does this also apply to the triangular spacing from the top of the thread to the bottom of the rail?

    Thank you!
     
  2. steveray

    steveray Sawhorse

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    Hunh...Thought I replied to this earlier....IBC allows a 6" sphere at the triangle, 4" elsewhere....Not sure about ontario....Are you related to Tim?
     
  3. mhorton

    mhorton Registered User

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    Oh! thank you, I just realized your reply. Also sorry I don't know Tim.
     
  4. tmurray

    tmurray Registered User

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    It also applies to the triangular spacing created by the bottom rail of the guard, the stair riser and the stair tread. There is no similar allowance for a 6" sphere in the OBC.
     
  5. steveray

    steveray Sawhorse

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    You Canadians are tough!
     
  6. tbz

    tbz Silver Member

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    I have to do some digging, been sometime since I worked on the Canadian Code, but there is a research paper floating around up north that specifies the different configurations that are allowed. I believe the supplier is George Bezdan and the website link is https://www.geobezdan.com/national-building-code
    They could get you to the correct information faster than anyone here I believe.
     
  7. mhorton

    mhorton Registered User

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    Okay, thank you all for your comments. I'm currently trying to edit a stair detail for precast concrete. I'm now curious about what some solutions are to meeting this code and what that would look like in the form of a detail. It sounds like I have no choice but to extend all of the vertical members into the concrete, but it sounds quite laborious.
     
  8. tmurray

    tmurray Registered User

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    Typically that is what we see. For the cable rail assemblies, like the Geobezdan, most people plow out the stringer so the tread in impeded in the full 2-by (usually 2x12).
     
  9. tmurray

    tmurray Registered User

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    The approval from Quispamsis on this website is me!
     
  10. JPohling

    JPohling Sawhorse

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    Looks like you have some difficult to pronounce names up your way!
     
  11. tmurray

    tmurray Registered User

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    Quis * pam * sis

    Most people mistakenly place the emphasis on the "pam" syllable, but there is only a very slight emphasis on the "Quis" syllable.
     
    JPohling likes this.

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