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Re: Threaded couplers for rods

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Scott,

If all else fails you can have a machine shop fabricate one from, say, a 1.5 or 1.75 diameter rod with holes drilled and tapped into the ends. The length of threads is easy (from first principals; I don't know about your codes); it's just the threaded area of contact times the shear strength times a reduction factor (say 40%) to account for the reduced area through the threads. You could double it if you wand to ensure that the rod fails before the coupling fails.

Regards,

H. Daryl Richardson

----- Original Message ----- From: "Scott Maxwell" <smaxwell(--nospam--at)engin.umich.edu>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, August 10, 2005 9:56 PM
Subject: Re: Threaded couplers for rods


Yep, but at least according to their literature they only have up to 7/8"
coupler (and it is not clear from their literature if that 7/8" is the
dimension of the coupler or the rod that it can handle).  I need one that
can deal with a 1" diameter rod.

Thanks,

Scott
Adrian, MI


On Wed, 10 Aug 2005, chuck utzman wrote:

I'm fond of Simpson's CN Wbecause of the stops & "witness holes" in the
middle--the only way to know if it's properly installed.
Chuck Utzman, P.E.

Scott Maxwell wrote:

>Can any one tell me what capacity that I should use for a threaded rod
>coupler for a 1" diameter rod?  I cannot seem to find capacities in
>various companies catalogs. I am assuming that it may not really >matter,
>that as long as proper material is spec'd and the coupler is long enough
>that it will have more capacity than the rod (much like a proper nut). >If
>so, what should the ASTM material spec be for a threaded coupler?  And
>what about length? I have found "standard" length ones (about 3" for a >1"
>diameter rod) and "long" couplers (about 7" for a 1" diameter rod).
>
>Thanks,
>
>Scott
>Adrian, MI
>
>
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