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If installing a support 4x4 column that will be approximately 16' long, can I use available hardware to connect (2) 8' 4x4's rather than use (1) 16' 4x4? The (2) pieces will always be in compression but I don't know if this is an accepted method of doing this or not. Columns will be supporting a cantilevered upper deck on a house. Please advise.
 

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Tileguy
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You had better look into the building codes. It isn't very likely the code will allow even a solid 4X4 to go that length to support an upper level.:no: I'm sure a spliced [anything] would be out of the question also.:yes:
 

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If your local Building Department is using the 2006 (most recent code), a 4x6 will not work. A 6x6 will go to the bottom of the deck joists--- 14' maximum. Anything taller has to be a larger post. Here is the code to date, bottom of page 7: http://www.awc.org/Publications/DCA/DCA6/DCA6.pdf

I suggest you ask your local building department as code acceptance varies locally.

Notice the ledger bolt requirements as well. Don't let this happen: http://www.nadra.org/industry_news/april07_woodbits.pdf

Be safe, G
 
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