Cantilever or post, beam and pad a bumpout

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Posted by: from Nanaimo
6/4/2011 at 4:02:00 AM


We are in the process of planning a renovation to a house we just bought. We plan to kick out a portion of our back wall 19' x 3'.

The joists go in the direction of the new kickout. Originally we had planned to tie into the current joists and cantilever the addition.

Upon further discussion the thought of pouring 3 pads with posts and beams to take the new renovation loads and tie it into the current foundation wall.

Does anyone have some insight (pro's/con's) to either method? The cantilever method requires a little more electrical work to pull wire from the panel so we can tie the joists in.

Thanks in advance.

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Date/Time6/16/2011 at 12:41:22 PM


Save yourself a lot of trouble.

Get some engineering done and submit for a building permit.

It would not be ideal if the local authorities ordered you to tear down all the new work, because you didn't get a permit.



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Date/Time8/17/2011 at 6:30:04 PM

Hi Shawn,

I agree completely about the engineering and permits. Cantilevering floor joists require a lot of work to tie back into the existing floor structure in order to make it safe. Concrete pads, posts and beams are the same. With moisture concerns on the Island, protecting from water penetration is vital to say nothing of the requirements for fastening the new structure to the existing framing.

With that said, I have just moved away from Nanaimo and can recommend some reputable contractors that are more than capable of assisting you with your project if you're interested.

Send me an email at and I'll be happy to send you their names.

Kelly Dickinson

Dickinson Contracting

Penticton, B.C.

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