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# Re: Masonry Fence

• To: seaint(--nospam--at)seaint.org
• Subject: Re: Masonry Fence
• From: Rick.Drake(--nospam--at)Fluor.com
• Date: Thu, 21 Dec 2000 16:05:19 -0800

```Treating it as a nonstructural component should work best.  Supported at
grade,  hx/hr will equal zero and Equation 32-2 should be beneficial.

(32-2) Fp =  ap * Ca * Ip * Wp / Rp say = 1.0 * 0.40 * 1.0 * Wp / 3 =
0.13Wp

Treating it as a nonbuilding structure, you must meet 30-4, 30-5 (max) ,
34-2 (min), and 34-3 (min) with R= 2.2 or 2.9 from Table 16-P.

(34-2) V = 0.56 * Ca * I * W say = 0.56 * 0.40 * 1.0 * W = 0.22W minimum

Rick Drake, SE
Fluor Daniel, Aliso Viejo

**********************************

"Larry Hauer" <lrhauer(--nospam--at)earthlink.net> on 12/21/2000 03:32:42 PM

To:   "seaint" <seaint(--nospam--at)seaint.org>
cc:

Subject:  Masonry Fence

Can anyone enlighten me on what formula,(s), to use  in the '97 UBC for
free standing masonry screen walls, (I've got one that is  over 19' high! -
obviously pilasters will be necessary). Table 16-O calls for ap  and Rp
values, (item H), but using these with formula 32-1 thru 32-3 will give
excessively high seismic forces. Formulas 34-2 and 34-3 seem more
appropriate,  except that they don't have the ap and Rp values included.

Larry Hauer, SE

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