Automatic bar width

Automatic bar width

Occasionally one may want to create a slab above a window or door that should extend from the lintel to the top of wall. Such slabs are entered via the lintel-bar input but use an identification number for a slab. In this case it is not necessary to calculate the slab width; instead the width can be specified as 99m. For this value, the HRB interpreter calculates the slab width from the start point to the layer contour at the top of wall. The start point in this case is the lintel of the window. For example, this could look like the following:

Thus the slab extends from the outer edge of the left window mullion to the outer edge of the right window mullion and in height from the underside of the lintel bar to the top of wall.

Module slabs

On some framework stations entire window and door replacements or the corner post combination can be installed into the wall as a finished construction. These so-called modules are prefabricated and installed as a single piece at the framework station into the wall. To enable this, the construction must be marked as a module when it is passed to the machine. The wall postprocessor can do this automatically if there is a slab in the wall to which the wall postprocessor assigns the material-dependent function 'define module'. This slab must be wide and tall enough that its outline in the wall view encloses all bars that are to be part of the module.

In the image below the slab is wide enough that it extends from the left edge of the left window mullion to the right edge of the right window mullion and from top of threshold to bottom of rail. It does not matter if the slab also overlaps threshold and rail, since only the bars that are completely within the outline of the module slab are considered.

So that the module slab is generated automatically and appropriately by the HRB module we make the following setting on the lintel bar:

• Identification number: Any identification number that is configured in the Wall postprocessor for the generation of modules.

• Cross-section width: 99m for an automatic calculation of the width up to the top layer contour at the top of wall.

• Cross-section thickness: any thickness

• Organizational group: any group that is not already used for other components.

• Layer: any layer. The recommendation is a layer that is not used for other components so that the layer contours can be adjusted as required for the module slab.

• X-Offset: Set the left and right projections using fixed values or variables. Here the variable for the window mullion width was used.

• Y-Offset: any depth position. Here the slab was positioned centered into layer 0.

• Reference edge: opening edge. Since we define the slab via the lintel bar, this is the layer edge at the top of the opening.

• Offset: OSTHUkW. This is the system variable for the lintel height measured from the underside of wall. This shifts the start position of the slab from the top of the window to the underside of the wall.

The slab now starts at the underside of the wall and in height (cross-section width) is automatically limited at the next layer edge. As this would, especially for windows, be the layer edge at the underside of the opening measured from the underside of the wall, the slab would otherwise extend only from the underside of the wall to the underside of the window. To prevent the layer edge at the underside of the window from interfering, we shift that layer edge with an offset of -1.0 m below the wall. See image below: