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Cantilered Column Embedment Into Masonry Pier

Cantilered Column Embedment Into Masonry Pier

Cantilered Column Embedment Into Masonry Pier

(OP)
I'm designing a monument sign which has a steel column on each side which is embeded into a masonry pier at grade.  The columns obviously cantiliver.  How far do I need to embed my steel column into my masonry pier?  The masonry pier sits on a footing 3'-4" below the surface. I believe the masonry pier will be 24"x24" with reinforcing and the steel column will be around a HSS8x8.  Thanks for the help.

RE: Cantilered Column Embedment Into Masonry Pier

I wouldnt rely on masonry for this, I personally would specify a reinforced concrete pier.

This is both for strength and for health and safety of workers below ground level.

RE: Cantilered Column Embedment Into Masonry Pier

Not sure I understand the question. If the steel columns are adequately connected to and cantilever from the footings, then isn't the masonry just a covering around the column? Control the column deflections to prevent cracking of the masonry.

RE: Cantilered Column Embedment Into Masonry Pier

If the pier is reinforced concrete, there is no reason to embed the tube columns - just use a steel moment connection with 4 anchor bolts into the concrete pier.  This also reduces the cantilever height of the steel columns.  If appearance is an issue, the plate could be set into the top of the pier by 4" to allow for a non-shrink grout cover over the base plate and anchor bolts.

However, if masonry is desired instead of the RC, I would have to agree with jike on the masonry.

Mike McCann
MMC Engineering

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