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Old 04-25-2018, 01:28 PM   #1
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Rim Joists and column footings, A Series of Questions


Hello forum goers.

This might seems like really obvious questions, but I have been struggling to find an answer.

I have read Canadian Wood-Frame House Construction a few times, but it glosses of these particular areas.


how do you construct a rim-joist when you do not have a single board long enough? Is it the same as header boards, just overlap a second layer? And when, if ever, do you use hangers to connect the floor joists?

When using a standard basement style foundation, the joist it held in position firmly by the sill plate. How how does it work with column footings? Does the beam (supported by the column footers) travel along the very edge of the floor, completely supporting the rim joist in all cases?

Thank you for any and all help and clarification.
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Old 04-25-2018, 04:39 PM   #2
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Re: Rim Joists and column footings, A Series of Questions


Rim Boards are butted up together and a splice can be added on the inside to help join them. That works when there are no joists landing at the seam. When they have a joist at the joint location, simply nail each piece of the rim to the joist.

Joist hangers are not required where the joists and rim boards are resting on the Sill Plate.

Hangers are required when the joists and Beam are at the same elevation, ie: there is not a Beam for the joists to land on. Nails alone will not carry the weight of the joist load, so a hanger is used. This is called a Flush Beam where I work.

Sorry, but I do not understand the last question, so can't answer that one.
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Old 04-25-2018, 04:53 PM   #3
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Re: Rim Joists and column footings, A Series of Questions


Thank you jlhaslip,
That is everything I need to know.
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Old 04-25-2018, 06:11 PM   #4
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Re: Rim Joists and column footings, A Series of Questions


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How how does it work with column footings? Does the beam (supported by the column footers) travel along the very edge of the floor, completely supporting the rim joist in all cases?
Ayuh,..... If I'm readin' this right,.....

With a post or column foundation, there's horizontal beams on top of the columns,.....

The floor/ platform/ deck is built on top of the horizontal beams,.....

Then of course, the walls on top of the platform,.....
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Old 04-25-2018, 06:56 PM   #5
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Re: Rim Joists and column footings, A Series of Questions


Or you can use the beam as the rim and then you would use hangers.
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