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Re: Nail Slip

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Bill, it is dimensionally consistent. There are factors within the constants for
each term that account for the apparent inconsistencies. Same applies to
diaphragm deflection equation.
John Rose/APA

Bill Allen wrote:

> Nels-
>
> As Dennis Wish once pointed out, this equation (along with others) is not
> dimensionally consistent. I worked an example in Mathcad and converted it to
> html. You can view this example at:
>
> http://www.allendesigns.com/sw/shearwalldeflections.htm
>
> I hope this helps in making this equation clearer.
>
> Regards,
>
> Bill Allen, S.E. (CA #2607)
> ALLEN DESIGNS
> Consulting Structural Engineers
> Laguna Niguel, CA
> http://www.AllenDesigns.com
> V (949) 365-5696
> F (949) 249-2297
>
> ||-----Original Message-----
> ||From: Nels Roselund [mailto:n.roselund(--nospam--at)worldnet.att.net]
> ||Sent: Tuesday, August 15, 2000 6:08 PM
> ||To: seaint(--nospam--at)seaint.org
> ||Subject: Re: Nail Slip
> ||
> ||
> ||Mike,
> ||
> ||Thanks for pointing me to the answer.
> ||
> ||Your explanation [in the Archives], that the implied units of
> ||the constant
> ||in the nail-slip term of the equation is 1/ft, seems to make
> ||sense.  It
> ||gives the nail slip term a value of 1/12  of the result I got
> ||by making the
> ||Table value of en unit-less.  It also gives a result that makes the
> ||contribution of nail-slip to the total deflection small
> ||rather than the
> ||major component of shear wall deflection.
> ||
> ||If the implied units of the constant were to be taken as
> ||1/in, the result
> ||would be the same as making en unit-less.
> ||
> ||Is your use of an implied value of 1/ft rather than 1/in based on
> ||documentation, or on what you know of the derivation of the deflection
> ||equation?  Or is your explanation based on what you, too,
> ||found to give the
> ||most sensible results?  I'd like to know that there is
> ||documentation and how
> ||to find it.  I don't like to have to  use magic formulas.
> ||
> ||Nels Roselund
> ||Structural Engineer
> ||
> ||
> ||-----Original Message-----
> ||From: Mike Valley <mtv(--nospam--at)skilling.com>
> ||To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
> ||Cc: n.roselund(--nospam--at)worldnet.att.net <n.roselund(--nospam--at)worldnet.att.net>
> ||Date: Tuesday, August 15, 2000 3:32 PM
> ||Subject: RE: Nail Slip
> ||
> ||
> ||>This was discussed on the list in July of 1999.  I posted on 7/8 and
> ||>7/15.  The archives contain the info.
> ||>
> ||>- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> ||>Michael Valley, P.E., S.E.                   E-mail: mtv(--nospam--at)skilling.com
> ||>Skilling Ward Magnusson Barkshire Inc.              Tel:(206)292-1200
> ||>1301 Fifth Ave, #3200,  Seattle  WA 98101-2699      Fax:        -1201
> ||
> ||
> ||
> ||
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