From: Christopher Wright <chrisw(--nospam--at)skypoint.com>
Date: Wed, 1 Mar 00 13:08:10 -0600
>Water collects in 1" space between underside of base plate and concrete
>foundation and freezes.
You can pretty much asume that the ice wlil expand as much as it wants.
Frozen pipes can develop several thousand psi, about what it takes to
rupture fittings, when the freezing is confined. It just expands enough
to make up the difference in density between liquid and ice. Handle it
pretty much the same as a thermal expansion problem. The only real
difference is that with ice, the difference in density comes from a phase
change, not a temperature change.
Christopher Wright P.E. |"They couldn't hit an elephant from
chrisw(--nospam--at)skypoint.com | this distance" (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)