Blockbau (also called Blockwerk, Gewättbau and Strickbau, Swiss German Fleck(en)) is considered one of the oldest construction methods in Western culture. In log construction, walls are created by layering lying timbers on top of each other, which are used as round timbers, flattened timbers or square timbers.
In stud plank construction, block or plank work is framed in stud frames. The constructive corner formation is carried out with the help of combing or foliation. -- ☛ see also Rope construction
walls are usually laid on strip foundations. Alternatively, depending on the situation, a hardwood frame (so-called foot trees) is also possible as a foundation. The length of the walls is determined by the size of the logs available.
In the case of round wood, the thick end of the logs is alternately placed over the thin end. In this way, the full wood is used. The spaces between the layered trees are provided with sealing fillings (e.g. moss or tow in barns).
In buildings with several rooms, the interior walls, if they are also built in log construction, can be combed with the outer walls. From the outside, they are then visible as a vertical row of beam heads.
In modern log constructions, sealed blockwork or spun blockwork with tongue-and-groove connections is increasingly used.
The strength of modern knitted or log house construction lies in prefabrication. Today, automated production processes are increasingly being used. The work is carried out on industrial CNC milling machines.
This leads to new possibilities of joining and to enormous cost savings.
The log walls are made by layers of horizontally laid block or shroth wood (more or less processed tree trunks). They rest either on a stone base or on individual supports to avoid direct contact with the ground. The shape of the cross-section varies depending on the type of post-processing.
Cross-section variants - baukobox
When two block walls collide, they are usually formed with a so-called "forehead" that protrudes about 250mm over the corner. The elements are laid crosswise on top of each other, notching them out at the top and bottom.
The forehead fulfils several tasks at once:
Since log construction has not yet been sufficiently defined in the relevant standards and regulations, the German Solid Wood Log House Association has drawn up the "Block Construction Directive". This guideline applies to walls built from machine-profiled and technically dried squared timber, planks or logs and describes and defines the most common construction types and manufacturing processes as well as the wood products used.
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