Log Cabin/Home Design
Log Cabin/Home Design
(OP)
Any information or data regarding the design and/or analysis of "Log Cabins/homes" wll be appreciated.
Thank you
Thank you
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RE: Log Cabin/Home Design
RE: Log Cabin/Home Design
As for the lateral design though, I would contact a local structural engineer who has dealt with these structures. They are a very different animal structurally in lateral performance. I have designed many over the years.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Log Cabin/Home Design
The ICC 400-2007 is the code for prescriptive design and gives TPI timber values for whole logs which up until now were hard to get. Most grading societies don't give values for whole round logs. The restrictions on seismic, wind and snow make ICC 400 not valid is about 1/3 of the US where you would normally build a log home or cabin.
Remember you can't use the entire round section for analyzing round beams in bending or compression. NDS 2005 for round piles lets you use the properties of a square with the same crossectional area of the enclosed circle. ASTM D3957 requires you to use the properties of a square that can be fully incribed inside the shape of the log. The ASTM spec is quoted in ICC 400 and 2009 IBC but ends up being very conservative (50% for Moment of Inertia and Section Modulous of round section h=b=0.707*dia). I normally use the NDS which gives about 75% of the section modulous of the full circle (h=d=0.86*dia).
The ILBA in conjunction with other groups use to offer a week long class in Fort Collins and Estes Park Colorado on design and engineering log homes. I haven't seen it advertised for several years.
If you have a specific style log home and specific questions the forum can probably answer them.
ICC 400-2007 2007 Standard on the Design and Construction of Log Structures
http
ILBA Log Building Standards
htt
March 2006 Structures magazine
http
Good luck. Log homes are fun and challenging.