Several years ago, I purchased 20 acres with a 20’x25′ cabin, with loft, that is sort of Timber/Beam construction, and it rests on 2 courses of aspen logs as a “foundation”. The property is located in NE Washington state with annual rainfall of 15-18″/yr, and seasonal range of temperatures from -10°F to 110°F. We are concerned about the longevity of the foundation logs and wish to replace them with a concrete foundation.
The structure consists of the log foundations supporting log floor beams with 8″x8″ timber posts at the corners and midwalls, bridged with 8″x8″ beams.
Since the structural load is transmitted to the posts and thus directly onto the foundation logs, I haven’t been able to come up with a fool-proof way to support the structure while removing the foundation logs to permit placing a concrete foundation wall.
Does anyone have any suggestions? thanks in advance.
Michael