Unthread

Under splitting up understands Zimmerer applying a profile to a tear ground . A two-dimensional representation of the roof profile is created on a wooden floor, the tearing floor, on a 1: 1 scale. The components are put in place, the markings transferred, torn and worked out.

The term unthreading describes the working method when drawing the lines on the drawing board. Since this is a roof to very long timber is in most components (10 m or more) is used to draw the lines a chalk line used.

In a modern carpentry shop, due to lack of space and time, the drawing floor is only rarely used and mostly for smaller buildings. Here is mainly the so-called computationally Abbund worked, while the required dimensions and angles are determined by calculation and means of Alpha angle touched on wood (to be distinguished). In times of technical progress, increasingly widespread joinery software is used and joinery machines are also used in many places.