Battens needed or not? Reclaimed fir table top - Woodworking Talk - Woodworkers Forum
 
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post #1 of 6 Old 03-23-2020, 09:41 PM Thread Starter
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Battens needed or not? Reclaimed fir table top

Hi, finishing up glue up on a 40x80 table top made from reclaimed, 100+ yr old douglas fir. Thickness will 1 and 1/2"


This will go on a trestle style table base, still being built, which will have 3 supports for the top. On the ends, about 14" off each end, and another in the middle. I could also do 4: spaced roughly 15" apart, I suppose. Top will be mounted with counter top style fasteners.



Question is, does a top this size and species need battens to help keep it flat? Not doing bread board ends. If so, how many and where?


Any advice appreciated. I've just never done a top this large, nor of OG fir and not sure how much potential to move/cup it will have.


Thanks!
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post #2 of 6 Old 03-24-2020, 10:08 AM
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With that wood and thickness, I wouldn't expect an issue. It will be well supported even by two trestles.

How are you planning on flattening it?

Robert
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post #3 of 6 Old 03-24-2020, 11:29 AM Thread Starter
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Quote:
Originally Posted by DrRobert View Post
With that wood and thickness, I wouldn't expect an issue. It will be well supported even by two trestles.

How are you planning on flattening it?

Thanks for the confidence. And you do think just two trestle's would do it? They'd be roughly 14-15 off each end, leaving around 48-56" in the center without support (depending how I construct the base). Span that long in the center unsupported still fine, you think? What if it had a center spine (lengthwise between the two end), that's another possibility. That wouldn't obviously support the width, but would support some of the general load. Just wondering.



As for flattening it, I'm not set up to do anything this large myself, so I will be doing some hand planing, and then there's a millwork shop not far from here that does customer projects in their off hours, and they have a belt sander that's large enough to accommodate this. I used them for a full kitchen's worth of butcherblock counters a few years back.
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post #4 of 6 Old 06-04-2020, 09:14 PM Thread Starter
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Quote:
Originally Posted by DrRobert View Post
With that wood and thickness, I wouldn't expect an issue. It will be well supported even by two trestles.

How are you planning on flattening it?



Hey there, long time since my last post. Not sure if anyone is curious, but just in case.... here's how the table turned out.



Top is reclaimed fir, finished with Rubio Monocoat.


Base is a reclaimed sawhorse made 50+ years ago buy a local carpenter to build ships. I cannibalized parts of an additional sawhorse to build out support for the top. Pretty psyched with how it turned out.
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post #5 of 6 Old 06-05-2020, 06:32 AM
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That came out really nice
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post #6 of 6 Old 06-05-2020, 12:46 PM
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sweet! i was just going to comment on posting a finished pic when i saw this
nice leg set too
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