Beam and posts size/specs

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Posted by: from Whitby
3/20/2017 at 7:04:46 PM


I'm planning on knocking down a load bearing wall on a first floor that supports a second floor and a roof. The wall is supported in the basement with a four 2 X 8s that rests on a foundation wall in one end and on an I-beam in the other end. The length of the basement beam is longer than the 10-foot span of the load bearing I plan to knock down.

What size of beam and posts do I need to replace the load bearing wall?

Thank you

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Guillaume from LEFGA in North Vancouver
Date/Time3/20/2017 at 8:18:45 PM

Hi there,

I highly suggest that you hire an engineer for this project.

Thank you,


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Date/Time3/20/2017 at 8:56:47 PM

Any structural work; such as removing a load bearing wall will require a building permit which will not be granted without an engineering plan (cost is approx. $1500 - $2000). One caution, if the work is completed without a building permit, any damage to your house will not be covered by your insurance.

We have completed many such projects and I am familiar with the Ontario Building Code, typically given what you are describing would require a steel beam which must be sized by an engineer.

In conclusion, my recommendation is to hire a reputable contractor who can lead you through the process of obtaining a engineering plan and then a building permit etc.

Good luck with your project.

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Date/Time3/20/2017 at 9:41:43 PM

Some calculations should be done by a professional engineer to be able to provide the right sizes of the beams and posts as well as some details on how you will support these posts to be safe without taking any risks.

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Date/Time3/20/2017 at 9:47:34 PM

From the sound of your span of ten feet I would assume two laminated beams 11 and 3/4 tall what should be more than sufficient. 2.0 laminated beams are the strongest and do not cost that much money. However I recommend you get the correct engineering requirements for them from the supplier of the beams or an engineer.

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Date/Time3/20/2017 at 9:54:37 PM

You will need to address this question to your municipal Township. Each town may have different bylaws and code restrictions that must be adhered to. They will need to check your home and ideally have full view of the beam you want to have removed. For example, we needed to remove a load baring wall in Aurora and their code was tripped up 2x6 posts holding a quadrupled up 2x8x14 beam with each joist that ran into the beam needing to have a steel hangar with 8 nails. Worst case scenario they will require you to use a LVL beam (s) which are quite expensive on their own and quite costly to install.

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Matt from MRC in Regina
Date/Time3/20/2017 at 11:00:55 PM

That's tough to say. Anything structural tied to the foundation is extremely important to do right. Without seeing it first hand, I wouldn't give any real advice other than to take this to a pro in your area. A journeyman or engineer obviously.

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Steve from BDR Construction in Kanata
Date/Time3/21/2017 at 8:19:33 AM

You are best served to get an engineer to look at your house. Should cost 300-400 bucks for them to assess. I'm assuming you are pulling a permit.

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