Use of process saw for load relief and crack control in log

Do not be surprised to see a cut on the upper surfaces of a round log or carriage (semi-oval log). This is a special technological saw that allows to control the process of cracking in the log.

What is the essence of the methodology? If it is impossible to avoid the formation of cracks in drying logs, and they are really not avoided even for winter forest, the task of controlling the occurrence of these cracks arises. It is better if the cracks (or the deepest of them) are directed upwards, there they will be covered by the slot of the upper log. At the same time moisture will not get into cracks, cold bridges will not form, other negative processes for wood and home will not occur.

To set the direction of cracks formation and discharge saw is performed in the upper part of log, depth is about one third of diameter. Propil allows to remove load (internal and external stresses) from the log and to indicate the required direction of concentration of internal forces, which inevitably arise in the log as a result of shrinkage and pressure of upper crowns.

Propyl is made along the entire surface of the log except for visible areas (near the ends, cuts, etc.).

The photographs in Figures 1 and 2 show logs in the bowl areas. Notice the props applied to the upper surfaces of the lower logs.

On a fig.2 the result of use of unloading cuts is shown, allowing to operate occurrence of vertical cracks.

Fig. 1.		Fig. 2.

As mentioned, unfortunately, there are still construction firms where surprised to shrug your question about unloading props, although this technology has become widespread.

Fig. 3.

The resulted information is the intellectual property of " "Log House Rus"".
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