GB2505215A - Joining of wooden log cabin timber wall logs - Google Patents

Abstract

The joining comprises two wooden or timber logs 1, 2 interconnected together, preferably at right angles to each other, and placing at least one rod 3, but may be up to four rods, downwardly through aligned notches in the interconnected logs. Rods are slotted down between all logs in each log cabin corner to make a waterproofed interlocking joint. The rod interlocks any shape profiled logs together making them stronger. The rod eliminates any gaps that could cause water to penetrate through the joint between two logs in a timber log cabin wall.

Description

Joint of differeñtrwall logs in wooden log cabin This design/invention relates to the construction of ajoint in different shaped profiles of the wall logs on a log cabin.

Log cabin wall logs can be joined in many different ways, but good timber joints need to be strong and waterproof.

Timber changes in size due to moisture content and when it does this, it does so across the grain to a much larger extent than it does along the grain. This means that a long length of timber lying on its side, like the walls in a log cabin, will expand and contract much more across the height of the timber (as it is lying on its side), than across the length of the timber.

The Log Cabin movement sideways across the grain does not greatly affect the structure of the cabin.

Due to this timber movement, there is always a small tolerance for settling which may cause problems with waterproofing. For example, in rectangular logs there are additional small wind notches next to the internal main notch which help to make the joint more resistant to water, but it is still not totally waterproof. This simple solution can't be used if the logs are shaped e.g., fUlly rounded, half rounded or any other different shape, because of the curved sides creating large gaps in the corners of the cabins By cutting standard internal notches in logs we can't achieve a perfect joint and this situation might cause water leaking.

In order to make a strong waterproofjoint, we've come up with an invention to use * additional rod! rods which can easily be slotted down between all logs in each log cabin corner to make a perfect interlocking joint. This rod easily interlocks any shaped profiled logs together making them strong and also making the joint waterproof This invention will now be described solely by way of example and with reference to the accompanying drawings in which: Figure 1 shows the left notched log (1), right notched log (2) and the interlocking rod (3) Figure 2 shows the rod (3) positioned internally on a straight profiled log.

Figure 3 shows 2 rods (3) positioned internally and externally.

Figure 4 shows 2 rods (3) positioned diagonally opposite the rods in figure 1 Figure 5 shows 3 rods (3) positioned externally in 3 locations.

Figure 6 shows 4 rods (3) positioned in 4 places, both internally and externally.

Figure 7 shows that this system can interlock any shaped profiles together, very easily. Some examples of different shaped log profiles (4) have been included on this page for examples.

The diagrams of different shapes is not exhaustive. Also the rod can be made into various shapes and some examples of those are also shown on the same page (5).

This notching method gives us the freedom to interlock any shaped profiles together very easily compared to existing notch methods. The rod not only enables us to do this, it also eliminates any gaps that couM cause water to penetrate through the joints.