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Metal Connectors for Wooden Posts Wayne Whitney 08-06-2007
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Posted by Wayne Whitney on August 6, 2007, 12:08 pm
Hello,

I have a couple questions about metal connectors (e.g. Simpon Strong
Tie connectors) that are used with wooden posts.

First, I often see post bases set in concrete which have two straps
extending upward to connect to opposite sides of a post (e.g.
Simpson's CB series). About what axises, if any, does
such a connection have the ability to resist moment? How about
lateral loads at the base?

Second, I also see caps for a post-beam connection which have a square
plate sitting between the beam and post, with a pair of legs folded up
around the beam and an orthogonal pair of legs folded down around the
post (e.g. Simpson's BC series). These resist lateral forces parallel
to the beam; how about lateral forces perpendicular to the beam? And
what about moments?

Lastly, is it possible to use these or other metal connectors to
design a wooden moment resisting frame?

Thanks, Wayne


Posted by on August 6, 2007, 12:18 pm
> Hello,
>
> I have a couple questions about metal connectors (e.g. Simpon Strong
> Tie connectors) that are used with wooden posts.
>
> First, I often see post bases set in concrete which have two straps
> extending upward to connect to opposite sides of a post (e.g.
> Simpson's CB series). About what axises, if any, does
> such a connection have the ability to resist moment? How about
> lateral loads at the base?
>
> Second, I also see caps for a post-beam connection which have a square
> plate sitting between the beam and post, with a pair of legs folded up
> around the beam and an orthogonal pair of legs folded down around the
> post (e.g. Simpson's BC series). These resist lateral forces parallel
> to the beam; how about lateral forces perpendicular to the beam? And
> what about moments?
>
> Lastly, is it possible to use these or other metal connectors to
> design a wooden moment resisting frame?
>
> Thanks, Wayne

do u have a pic of building ?


Posted by Wayne Whitney on August 6, 2007, 12:22 pm

> do u have a pic of building ?

My questions are mostly theoretical, but if you like consider a small
gazebo without any diagonal bracing.

Cheers, Wayne


Posted by RicodJour on August 6, 2007, 12:31 pm
> Hello,
>
> I have a couple questions about metal connectors (e.g. Simpon Strong
> Tie connectors) that are used with wooden posts.
>
> First, I often see post bases set in concrete which have two straps
> extending upward to connect to opposite sides of a post (e.g.
> Simpson's CB series). About what axises, if any, does
> such a connection have the ability to resist moment? How about
> lateral loads at the base?
>
> Second, I also see caps for a post-beam connection which have a square
> plate sitting between the beam and post, with a pair of legs folded up
> around the beam and an orthogonal pair of legs folded down around the
> post (e.g. Simpson's BC series). These resist lateral forces parallel
> to the beam; how about lateral forces perpendicular to the beam? And
> what about moments?
>
> Lastly, is it possible to use these or other metal connectors to
> design a wooden moment resisting frame?

Most of the metal connectors have little if any rated ability to
handle moments. The connectors that do have such a capability are
special order and far heavier construction than the typical connectors
found at the Borg.

Simpson's tech support is quite helpful - give them a call if you have
questions about a specific connector and its load capacities.

R


Posted by Robert Allison on August 6, 2007, 1:00 pm
RicodJour wrote:

>
>>Hello,
>>
>>I have a couple questions about metal connectors (e.g. Simpon Strong
>>Tie connectors) that are used with wooden posts.
>>
>>First, I often see post bases set in concrete which have two straps
>>extending upward to connect to opposite sides of a post (e.g.
>>Simpson's CB series). About what axises, if any, does
>>such a connection have the ability to resist moment? How about
>>lateral loads at the base?
>>
>>Second, I also see caps for a post-beam connection which have a square
>>plate sitting between the beam and post, with a pair of legs folded up
>>around the beam and an orthogonal pair of legs folded down around the
>>post (e.g. Simpson's BC series). These resist lateral forces parallel
>>to the beam; how about lateral forces perpendicular to the beam? And
>>what about moments?
>>
>>Lastly, is it possible to use these or other metal connectors to
>>design a wooden moment resisting frame?
>
>
> Most of the metal connectors have little if any rated ability to
> handle moments. The connectors that do have such a capability are
> special order and far heavier construction than the typical connectors
> found at the Borg.
>
> Simpson's tech support is quite helpful - give them a call if you have
> questions about a specific connector and its load capacities.
>
> R
>

I am trying... to ... resist....aaaaahhhhh! Failed!

A beam walks into a bar. Bartender says; What'll ya have, buddy?

Beam says; Just give me a moment.

--
Robert Allison        
Rimshot, Inc.
Georgetown, TX

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