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RE: Masonry, equivalent solid thickness

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NCMA Tek 141 gives the An =net cross sectional area, Sx, Sy, Ix and Iy
for various thicknesses and spacings or grouted cells (i.e., 8" wall
with cells grouted at 24" o.c.).  E-mail me directly, and I will fax you
the pertinent tables.

Charles F. Espenlaub, III, P.E.
Martin-Espenlaub Engineering

-----Original Message-----
From: sharonb(--nospam--at) [mailto:sharonb(--nospam--at)]
Sent: Sunday, January 14, 2001 3:10 PM
To: seaint(--nospam--at)
Subject: Masonry, equivalent solid thickness

I am looking for commentary and/or charts discussing the equivalent
thickness of masonry.  

Specifically for example:
In-plane 8" wall design, Calculating Vm = Cd*Amv*(f'm)1/2
For a solid grouted wall, t for calculating Amv = 7.625"
For a wall with grouted cells at 24" o.c., t = ?

By using a table for the "average weight of completed wall, and
solid thickness"
The tabulated value for 8" solid grouted = 75psf, with t = 7.625"
The tabulated value for 8" grouted at 24" o.c. = 55psf, therefore
algebraically t = 5.592"


Sharon Robertson Bonds, PE
Salerno/Livingston Architects
363 Fifth Avenue, Third Floor
San Diego, California  92101
(619) 234-7471