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Author Topic: Balcony supports and attachment to frame  (Read 348 times)

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Offline rfndzc

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Balcony supports and attachment to frame
« on: June 16, 2022, 01:37:42 PM »
Haven't been able to find much info on building a second-floor balcony onto a timber frame.  The picture below seems to be a pretty close approximation to what I'm thinking for balcony supports (although here affixed to a masonry structure in the image).  Would I just use splines to join the back of the support bracket posts flush to the posts in the frame?  

Else, has anyone devised a clean way to join the joists and braces of the balcony directly from the frame rather than appending these support brackets?  Meaning, is it possible to extend the floor joists (or tie beam) of the second story across the plate, so as to become the balcony joists and remain on level?  Otherwise, joining the balcony beam at the post would likely interfere with the tie beam joint at the same location.  Perhaps again a spline joint would be the obvious choice.

Any resources you could point me towards would be appreciated.  

-Robert






Offline rusticretreater

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Re: Balcony supports and attachment to frame
« Reply #1 on: June 16, 2022, 04:13:31 PM »
Is this new construction or existing?  Do you have to tear out the exterior wall?   Are the floor joists mortised into the frame?  Pictures if you got them.

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Offline rfndzc

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Re: Balcony supports and attachment to frame
« Reply #2 on: June 16, 2022, 08:45:12 PM »
It's a yet unbuilt, new construction.  Currently under design, and kicking around implementation details such as this.  I don't have a sketchup drawing for the frame yet, though I'll certainly be putting that together; perhaps I should start there as it should help clarify the issue.  

Really I'm looking for a sense of what the options are for supporting a balcony to be on level with a second-story, particularly as in my case, where the balcony could be built from the outset rather than appended afterwards to an existing construction. 

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Re: Balcony supports and attachment to frame
« Reply #3 on: June 17, 2022, 10:37:30 AM »
Just found this in Jack Sobon's Timber Frame Construction book.  Here the balcony is slightly below floor level which makes sense.  I like this approach, and as he says it "helped solve a problem many timber framers have-- bringing too many timbers together in one place".  It could possibly be adapted to be on-level, though the third mortise shown for the sill (or girt) at floor level would still present a challenge.  





Offline rusticretreater

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Re: Balcony supports and attachment to frame
« Reply #4 on: June 17, 2022, 11:09:03 AM »
Interesting design.  I am not sure about it however as the pegs are not supposed to be primary load bearing.  It will still be pretty strong however.  Make bigger pegs!  You could also notch the post and shape the bottom of the bracket to fit in it for extra support.

My quick design thinking is that if the floor joists are mortised into the frame, you can offset space them from the ones on the other side of the beam. Left, right, left, right. This will allow you to skip around the post and beam joint too.  You will be able to install support braces for the platform with the bottom end supported by the posts.  

For a wider span on the balcony, you install another post(s) between the main posts.  These support posts can be smaller in thickness as they are just used to support balcony braces.  Hopefully you can picture all of this.

Also, just google timber frame balcony and click on images for plenty of design ideas.  There are also a couple of vids on it too.
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Offline rfndzc

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Re: Balcony supports and attachment to frame
« Reply #5 on: June 17, 2022, 02:44:37 PM »
Quote
Interesting design.  I am not sure about it however as the pegs are not supposed to be primary load bearing.  It will still be pretty strong however.  Make bigger pegs!  You could also notch the post and shape the bottom of the bracket to fit in it for extra support.
Hard to see in the pics but the tie beam is shouldered into the post as well.

Found a vid or two, will check those out.  Thanks


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