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Re: wood frame bldg deformation and windows

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Are the windows the full story height?   If they are not, would it be
appropriate to use (window height/story height)*Delta M to obtain the drift
differential between the bottom and top of the window?  Would this reduce
the value to something you could handle?  Do you have drift calculations on
the wood shear walls?

It sure seems like this is a non-issue.

That's my two cents worth.

Conrad
----- Original Message -----
From: "regis king" <steelfishez(--nospam--at)hotmail.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, January 08, 2002 4:42 PM
Subject: wood frame bldg deformation and windows


> Have any of the list members had to address the effect of seismic drift on
> the windows of a wood frame apartment building? I am not referring to a
> large retail window wall system, but rather typical residential windows.
UBC
> 1633.2.4.2 includes "elements that are attached to or enclose the
exterior".
> Most vinyl windows are attached with vinyl flanges on the outside. I
believe
> that the vinyl itself has some inherent flexibility, but this is obviously
> difficult to quantify. I know that slotted holes can be used. However, the
> slotted holes are not likely long enough to meet the code requirements if
a
> residential window is included in UBC 1633.2.4.2. Note that this same
> section requires the greater of Delta M or 0.5 inches. The slot would have
> to be 1" + the width of the screw to qualify. I have never addressed this
> issue and it has been brought up on one of my jobs.
>
> Thanks in advance for any help.
>
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