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RE: 3X Plates and Washers on Intermediate Anchors

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Eli,

You are correct.  And I agree that it is not too terribly likely, which is
why I said "if there is net uplift" (a big IF in most cases, but not
impossible in hurricane areas with ranch style homes).

Regards,

Scott
Adrian, MI


On Thu, 2 Mar 2006, Eli Grassley wrote:

> I think what Scott is saying, is that between the ends of the shear wall you
> might have some wind uplift that is being transferred down from the roof in
> the wall studs.
>
> Unless your building is 1-story, and exceptionally light, I doubt this is
> really an issue though after you add up all the dead weight of most normal
> structures.  If any engineer out there has actually checked sill plate
> anchor bolts for Oz uplift of the entire structure, please raise your hand.
>
> ~~ Eli ~~
>
> -----Original Message-----
> From: Bill Allen [mailto:T.W.Allen(--nospam--at)cox.net]
> Sent: Thursday, March 02, 2006 3:42 PM
> To: seaint(--nospam--at)seaint.org
> Subject: RE: 3X Plates and Washers on Intermediate Anchors
>
> Scott -
>
> I was referring to the intermediate anchor bolts. I'm not suggesting that
> one should omit the nuts on the hold down anchors (if any) at the ends of
> the shear walls.
>
> So, in theory, the uplift mechanism would be "cleaner" (i.e., no dispute
> what anchors are resisting uplift) without nuts on the intermediate anchors.
>
> T. William (Bill) Allen, S.E.
> ALLEN DESIGNS
> Consulting Structural Engineers
>
> -----Original Message-----
> From: Scott Maxwell [mailto:smaxwell(--nospam--at)engin.umich.edu]
> Sent: Thursday, March 02, 2006 2:28 PM
> To: seaint(--nospam--at)seaint.org
> Subject: RE: 3X Plates and Washers on Intermediate Anchors
>
> <snip>
>
> As a side note, I would believe the big issue with regards to not placing
> the nuts and plate washers would be overall uplift on the wall.  If there
> is net uplift, then those anchor bolts would be all that in theory
> prevents the house from flying off to Oz.
>
> Regards,
>
> Scott
> Adrian, MI
>
>
>
>
>
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