Carefully examine the selected

A special hole for the wax is drilled in the beam. It is made more than the length of the backed by 2-4 cm.

To save financial costs, you can use a non -trained beam. This is acceptable. However, you need to carefully examine the selected material for the presence of knots and curvature. The presence of such elements can negatively affect the general properties of the material. Only the minus is that at the end of all the work performed, it will be necessary to carry out a finishing type of work in order to hide the non -driving timber.