Datum Marker for finished floor level (FFL) and axes

Datum Marker for finished floor level (FFL) and axes

A "metre mark" is a marking used on construction sites to ensure a uniform height measurement for different construction phases. It serves as a reference point for the entire structure and is usually attached to walls, pillars or other fixed components. The function of a metre mark can be explained as follows:

1. defining the height: the metre mark is usually marked 1 metre above the finished floor (OKFFB - upper edge finished floor). This height serves as the starting point for the measurements during the entire construction process.

2. reference line: The metre plan can be used to check the height of various components and installations. For example, the exact height of ceilings, windows, doors or other building elements can be checked by measuring the planned dimensions from the metre mark.

3. easy to use**: The metre mark is usually marked by a horizontal line applied using measuring equipment such as levelling devices or lasers. This line is applied at various points in the structure so that it is easily accessible and visible.

4. control during the construction process**: As heights can change during construction, e.g. due to the application of screed or other work, the metre mark remains as a fixed reference mark and enables constant control of the construction height. The metre marker is therefore a key aid for precise and consistent work on the construction site.

We supply the metre marker in 2 versions:

Without brush (Rothbucher RS10):
The stickers are used to mark the metre mark on construction sites without plastering work in door or window reveals. In order to permanently secure the axes until the building is completed, the plaques are already measured and fixed to the slab formwork or the edge formwork of the slab. The clearly visible negative imprints serve as a reference for the dry lining and other interior installations. The foreman uses the imprints on the edge of the ceiling to transfer the axes to the freshly concreted ceiling using a chalk line or laser. If necessary, these can be used later for the façade installation.

With brush (Rothbucher RS 21, self-adhesive):
The self-adhesive RS21 plaques are applied to unplastered walls and serve as clear reference points for all tradesmen. To prevent dimensional deviations when transferring, the stickers have a projection on which the metre rule can be securely placed. The flexible "plastering brushes" ensure that the metre mark remains clearly visible even after the plastering work. This means that both heights and axes remain secure during and after the plastering work. Once the construction work is complete, the brushes are cut off, requiring only minor reworking, and the plaques remain under the plaster as evidence.

Tip: To prevent tampering, the corners of the plaques should be marked in colour. In this way, any deliberate displacement will be noticed immediately.