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Should We Frame Flooring Joists?

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Old 10-05-2012, 08:26 PM   #1
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Should We Frame Flooring Joists?


I hope somebody can help. I currently have a builder in replacing our old wooden garage with a brick extension on the side of our house. All is well, walls are up, roof on etc. BCO is happy enough.

Now we are at the stage of laying the flooring joists. A 6inch breeze block wall has been constructed around the room (and down the middle) to support the weight of the joists. The builder is suggesting that the flooring joists simply sit on top of this without being bolted down, using the actual floor panels to hold them in place.

From my limited experience, I expected there to be a wooden 'frame' fixed around the walls of the room and the joists to be secured to this.

Can anybody tell me whether the frame is necessary? If not, is it acceptable to simple rely on the weight of the floor to hold joists in place? To me, it sounds like I'd end up with a very creaky floor!

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Old 10-05-2012, 08:58 PM   #2
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Re: Should We Frame Flooring Joists?

I would ask the builder for an explanation.

I gather that this is no longer a garage?

People used to set joists directly on or in masonry, but modern framing doesn't call for this anymore. Today, the joist are set on a pressure treated plate. This simply gives us something to attach the joists to.

In the case of a roof, it keeps the entire roof from blowing away as well.

Regarding the floor of a structure in a non-windy area, I suppose it is not going to blow away. It may still collapse, so we use a 'rim joist' on the outside to keep the perpendicular joists from falling over. Of course the floor sheathing helps with this as well. You can put blocking in between each and every floor joist in place of a rim joist. It is a lot more labor. Or you can just use blocking close to the ends. I would miss something solid to attach the sheathing and siding to.

Good luck and let us know what the BOC is and what your builder comes up with.


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Old 10-05-2012, 10:31 PM   #3
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Re: Should We Frame Flooring Joists?

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