Expansion clamp design and construction

Taiga Bonzai

Introduction

In the article ‘Wiring practices part 2B’ it was mentioned that the twin trunks of my mountain ash/rowan, Sorbus aucuparia were trying to fuse together, which would have spoilt the overall design. (image a) Hence a 3cm block of wood was wedged in place to keep them apart, purely as a temporary measure. (image b)

Rowan red wires & wood

Having given some thought to the problem 2 options came to mind, (1) to use 4 heavy guy wires (red lines) to keep the trunks apart, but where to attach them – they cannot be attached to the plastic container, because (a) the amount of tension and force required would distort it. (b) The present angle is too acute and the wires would slip down as soon as tension is applied damaging the bark.

Alternatively build a large box around the container and attach the wires to that, this was also rejected, because to…

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