From: "Martin W. Johnson" <MWJ(--nospam--at)eqe.com>
Date: Thu, 3 Feb 2000 08:59:26 -0800
Several people mentioned that an overturning ratio of 1.0 would be ok. The code
has no specifiec number, however, from a practical standpoint, 1.0 can never be
used because the soil pressure would equal infinity at a ratio of 1.0. Normal
checks for the maximum soil pressure (including the 1/3 increase commenly taken
for seismic) tend to limit the overturning ratio to the range of around 1.5.