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#1
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Wood Movement in a table
I am building a fairly large table and asked about dealing with the wood
movement a few days ago. After much thought I have decided to securely fasten down the middle of the aprons perpendicular to the grain and fasten the ends of those aprons down with clips. The aprons parallel the grain have to be able to move .8". I will glue fiberglass dowels into them, and have the dowels ride in blocks attached to the table. Does this seem reasonable? Questions: 1) As the wood expands, will the holes in the blocks get smaller or bigger? I am guessing the hole will get larger, but I am not certain about that. 2) What woods have minimal movement. Would nice oily teak be good? I have some scraps of that laying around. (I have some lignum vitae also, but that seems like overkill.) |
#2
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Wood Movement in a table
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#4
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Wood Movement in a table
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#5
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Wood Movement in a table
Wood expands -- hole becomes elongated across the grain. Wood shrinks -- hole contracts across the grain. Diameter of hole along the grain does not change. So I can't maintain a good fit. If I use a fiberglass dowel, the hole will expand and contract on the dowel, in one dimension. If I use a wood dowel, the hole and dowel will expand and contract evenly in one direction, but unevenly in the other. Maybe a fiberglass dowel running through a plywood hole... Yeah, I know I am making this more complicated than it has to be. |
#6
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Wood Movement in a table
(J T) wrote:
Sun, Sep 24, 2006, 7:01pm (EDT+4) (Toller) doth puzzedly queryeth: snip Questions: 1) As the wood expands, will the holes in the blocks get smaller or bigger? I am guessing the hole will get larger, but I am not certain about that. 2) What woods have minimal movement. snip 1. Think about it for a minute. Before you ask next time. Wood expands - smaller holes. Wood shrinks - larger holes. Pretty basic if you think about it. Or, think about it for two minutes and come to the opposite, correct conclusion! -- Alex -- Replace "nospam" with "mail" to reply by email. Checked infrequently. |
#7
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Wood Movement in a table
"Toller" wrote:
I am building a fairly large table and asked about dealing with the wood movement a few days ago. After much thought I have decided to securely fasten down the middle of the aprons perpendicular to the grain and fasten the ends of those aprons down with clips. The aprons parallel the grain have to be able to move .8". I will glue fiberglass dowels into them, and have the dowels ride in blocks attached to the table. Does this seem reasonable? Yes. Make sure to attach those blocks to the table with screws not glue, though. Otherwise it might be a little hard to get the dowels into the holes, or remove the top if you want to at a future date. Questions: 1) As the wood expands, will the holes in the blocks get smaller or bigger? I am guessing the hole will get larger, but I am not certain about that. Pretty sure you are right. 2) What woods have minimal movement. Would nice oily teak be good? I have some scraps of that laying around. (I have some lignum vitae also, but that seems like overkill.) Are you talking about for the block? Why do you want minimal movement? I think you should use the same wood as in the apron, so that as the apron moves (and with it, so does the dowel), the hole will move along with it. -- Alex -- Replace "nospam" with "mail" to reply by email. Checked infrequently. |
#8
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Wood Movement in a table
"Toller" wrote in message ... I am building a fairly large table and asked about dealing with the wood movement a few days ago. After much thought I have decided to securely fasten down the middle of the aprons perpendicular to the grain and fasten the ends of those aprons down with clips. The aprons parallel the grain have to be able to move .8". I will glue fiberglass dowels into them, and have the dowels ride in blocks attached to the table. Does this seem reasonable? Questions: 1) As the wood expands, will the holes in the blocks get smaller or bigger? I am guessing the hole will get larger, but I am not certain about that. 2) What woods have minimal movement. Would nice oily teak be good? I have some scraps of that laying around. (I have some lignum vitae also, but that seems like overkill.) One wood with very little movement is mesquite. todd |
#9
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Wood Movement in a table
"alexy" wrote in message ... Or, think about it for two minutes and come to the opposite, correct conclusion! Classic! |
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