They wouldn't approve of attaching a 2x2 to the side of the post, because butt joints like that can't be effectively sealed against the weather. Or, even without force applied by the infill timbers, the groove cut into the post still makes the post weaker and more prone to splitting. The main reason they will tell you is, if you cut a groove down the length of the post you create a line of stress, and when you put timbers into it if they twist they act as a lever against the post, and can potentially split it down the middle. Or you can do the opposite, and cut a nut on the side of the upright and grooves into the ends of the timbers. One of course is to cut a groove in the upright and tenons on the end of the infill timbers, and this is what might be the most obvious. Regarding how the timbers join the uprights, there are 2 methods historically. But the Central Europeans also do not use chinking of any sort, rather rely on precise planing and fitting along with splines between the horizontal courses. However, the Swiss also frame with well-seasoned timbers, and particularly the infill timbers will be thoroughly dried and precisely manufactured so that movement is limited to the general seasonal variation, rather than settling due to the drying of timbers set up green.
To account for this, there is typically some sort of expansion joint at the top of the wall. So as the timbers settle and dry out the whole wall shrinks and contracts vertically.
Functionally it is a timber frame, although without oblique bracing since the carefully fitted and interlocked infill also braces the structure.Īs far as settling, here's how the Swiss do it (because I know this tradition, I reference it) The infill is set into grooves in the posts (or otherwise interlocked with the posts-we'll get to that in a bit), but NOT fastened to them in any way. Usually it isn't thought of as log building, instead it's thought of as timber framing with a heavy wood infill. In German we'd call it, "Blockständerbau" where "Blockbau" refers to true log construction, and "Ständerbau" refers to any sort of timber building where loads are carried by upright posts (Ständer) (modern stick framing is, in fact, classified under the term "ständerbau" as are older timber framing methods) You can find some quite old houses in this region using this technique (We're talking the oldest wooden houses in all of Europe as old as the 11th and 12th centuries) This general technique is quite common in parts of Europe, particularly in the Western Alps including regions in Southeastern France, Switzerland, and Italy. TMEN's article, I kind of wonder about trying to tip logs down between posts like he shows, one of the posts has to move quite a bit for that to work unless the shoulder's fit is quite loose. I had never contemplated individual mortise and tenons, interesting. Part of it is just what is considered acceptable tolerance, it isn't structural just aesthetics. I think it would be easier to timberlok 2x2's to the post and groove the ends of square cut logs. I found it time consuming to make the grooves and difficult to get the shoulders of the tenons to line up from face to face.
I've only done this on 2 log homes and I pinned the logs to the posts in the grooves. I'd count on touching up the chinking if its green. It took about a week and some serious persuading on one of them. The log corner notches in the cribs settled but the tenons in the grooves hung up. When we jacked and adjusted everything this year I had to wrap strapping and come-along that part to get the logs to slide down in the grooves. On the log barn I've posted pics of, the crib corners were notched but on the gable ends the logs continued on out 10 more feet and were tenoned into 12x12 white oak posts to form the shed. Įven with a continuous groove think about what spiral grain is going to do to tenons on either end of that log, movement will not be free. Usually when the "shrinks to fit" stuff starts make sure you have a good tin foil lining inside your ball cap. You're quite right, I smiled when I saw that too.
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