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RE: Fixed base timber column

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Not sure of your location (soil or climate) but what about just casting the
columns into the concrete?  If the concrete sticks up above your snow/soil
level and is sloped away from the columns, the columns will stay reasonably

Paul Meyer

> -----Original Message-----
> From:	Thomas Long [SMTP:tomlong(--nospam--at)]
> Sent:	Wednesday, January 20, 1999 08:00 am
> Subject:	Fixed base timber column
> Importance:	High
> I am designing a free standing trellis.  The footprint is about 100ft x
> 20ft.  The owner wants to use 10x10 timber columns, 10x12 beams with 4x8
> lattice at 36" o/c.  The columns are founded on 18" diameter caissons.
> The
> timber columns are spaced at 14'-0".
> The owner would not like to see the typical knee braces to support the
> timber frame from lateral movement, and no exposed connections.  I have
> been
> tossing ideas around in my head about how to approach this fixed base
> timber
> column condition.
> The ideas I have come up with are:
> 1. Use a vertical steel plate in the center of the column and bolt through
> and plug the holes.  I do not feel to good about this.
> 2. Embed threaded rods into the concrete either when they pour the
> caissons
> or then drill into the column and install with epoxy adhesive.  Not a bad
> solution, but how do I design it.
> 3. Embed a 2" +- pipe column into the concrete and drill the column and
> then
> bolt through and plug.  Hard to drill into the timber and to construct.
> Has any body designed a structure like this and if there is, how did you
> do
> it, what is the best solution.
> Thank you in advance.
> Thomas Long
> Thomas Long Engineering