Steel Grating - Oddball Cantilevers and Pipe Penetrations 1

[JoelTXCive]

Is anyone aware of design documents or literature addressing holes and pipe penetrations in steel bar grating?

Or the oddball small cantilevers that you can get around penetrations or due to geometric layout of the grating?

I have checked two NAAMM Bar Grating Design manuals (2014 & 2017) and I did not see it mentioned.

I'm trying to decide when a pipe penetration is small enough that I don't need to worry about and when a penetration will require beams underneath to support.

Thank you!

 

[SlideRuleEra]

...design documents or literature addressing holes and pipe penetrations in steel bar grating?
Or the oddball small cantilevers that you can get around penetrations or due to geometric layout of the grating?

Don't think so, just basic calculations based on geometry and grating structural properties. The single biggest thing that can be done is to band grating ends and larger openings to distribute load among nearby grating bars.

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[WARose]

Is anyone aware of design documents or literature addressing holes and pipe penetrations in steel bar grating?

Not that I've seen.

I'm trying to decide when a pipe penetration is small enough that I don't need to worry about and when a penetration will require beams underneath to support.

I've looked at this before and it varies based on grating type, span and so forth......but typically on drawing notes I would say all grating openings 12" or larger should be banded. I also typically limited the number of openings per span and size of said openings. (Or they could put a million holes in there.)

 

[CANPRO]

I think it also depends on how much reserve you have when comparing the load requirement to the unaltered grating. If you’re already at 100% capacity then technically you’d need additional support for every opening or you would overload the bars adjacent to the opening.