# Log Construction - Layout

If a wall is assigned to log construction, the entire wall is always filled with timbers. The division of the wall into timbers is always performed from bottom to top. The timbers of individual walls are always offset in height by half the pitch relative to one another.

For the components that belong to the log construction, the timber types 650/LogConstruction, 652/LogConstructionSill and 651/LogPlank are automatically used. The sill generated by the log construction assignment therefore receives timber type 652/LogConstructionSill. The generated log planks receive timber type 651/LogPlank.

For MOS buildings, the MOS of the wall in which the component is located is used.

The MOS layer is equal to the layer in which the component is created.

**Block construction specification**: In the drop list, select the log construction variant with which the wall should be assigned. The first line always contains the option '(from wall)'. This option uses the log construction variant from the wall configuration.

**Replace members**: Here you configure whether components should be deleted before assigning the wall.

> **None**: If the option 'None' is selected, all components that already belong to the wall are preserved.
>
> **All**: If the option 'All' is selected, all components that belong to the wall are deleted.
>
> **Log construction only**: If the option 'log construction only' is selected, only those components of the wall that were generated by a log construction assignment are deleted.

## Wall selection

After exiting the dialog box with 'Assign', you must first select the walls that start with a whole timber. After the first wall has been selected, only walls parallel to that wall can be selected.

To simplify the selection of walls, after choosing the first wall all parallel walls are offered. These walls are displayed blinking. If you answer the prompt in the dialog box with left mouse click, all blinking walls are selected automatically. With right mouse click you can manually select the desired walls.

Subsequently, the walls are selected whose timbers are vertically offset by half the pitch. To simplify the selection here as well, first all walls perpendicular to the first wall of the first group are offered. If you now answer the prompt in the dialog box with left mouse click, all blinking walls are selected. Right mouse click again provides manual selection.

The selected walls are highlighted. If an already selected wall is selected again, it is removed from the selection. It is therefore no longer highlighted.

**Generating the timbers**

Once the selection of walls is complete, the timbers are generated. The length of these timbers is determined by the contour of the layer.

When generating the timbers of a wall, the timbers from other walls are initially disregarded. The timbers of different walls can therefore intersect. The timbers are only connected with the modifications in a second step.

If a sill is generated, it is not connected with a modification. Sills are always cut with bisecting angles.

In the first group of walls, the division begins at the point of the wall with the lowest global Z value. The height of the sill ('Sill rise', dialog box: Settings for wall construction) is then added to this point. The next timbers are then each offset upwards (global Z) by the value 'pitch'.

In the second group of walls, the starting point for the division is offset downwards (minus Z) by half the value of the 'pitch'.

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## Layers and levels

In general, components are generated in the assigned layers. Positioning in the 'depth' is determined by the setting in the field 'Depth position' of the dialog box 'Wall construction'.

If the thickness of the layer in the wall does not match the width of the component, the component is nevertheless created. The thickness of the layer is not adjusted to the width of the component.

If the thickness of the layer in which the component is to be created is zero, no components are generated if this leads to problems when creating the components. In this case, after generating the remaining components, an informational message appears. If no problems occur with a layer thickness of zero, components in that layer are also generated.

The components receive the same level number as the layer in which they are generated.

## Modifications

Each component initially receives at least one segment at the beginning and at the end. The segment is perpendicular to the visible side of the wall. This means the base angle is always 90°. If a component, at the timber start or timber end, meets only one line of the layer contour, it receives a segment there. If the component, at the timber start or timber end, meets two lines of the layer contour and these two lines form a convex shape, the component receives two segments.

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If the two lines of the layer contour form a concave shape, the component receives a V-cut.

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Depending on the modification with which the timbers are connected, the timbers can also be extended.

Lines of the layer contour that are parallel to the axis of the log planks (horizontal) and lie within a log plank are not considered. The log plank is nevertheless created with the full cross section.

Each timber additionally receives the modification 'batt side' with side C as the batt side.

The remaining modifications, such as drillings and grooves, are explained above in the description of the respective dialog boxes.
