> join the two together with logs each side of the stone using motise and tenon joints with an extended tenon. (like the legs of a refectory table) When the wedges are driven home it will grip the stone like a vice.
Extended tenons with wedges have all the strain on the wedge holes and they can easily shear away under strain unless the tenons are left fairly long. Tapered mortices and wedged tenons (like a hammer head) would make a stronger job and then further wedges could be driven between the stone and the logs to tighten the whole thing up, but in general I like the principle. It would be stronger than using a rope lashing and may well solve the problem of slippage.
|