Meter crack
The meter mark is a marking at significant points in the building shell (often next to door openings or around the entire room). It is the reference height for installations whose installation height must correspond to a planning specification. Examples of this are electrical installations such as switches and sockets, sanitary facilities such as wall-mounted toilets, fittings and drains, but also door frames and the height of the floor.
A specification “OKFF + 1.00m” is characteristic of a ground floor; the marking is therefore exactly 1 meter above the later upper edge of the finished floor . If “OKRF” is written on, the meter plan refers to the unfinished floor. Are planning heights to be taken into account across all floors, e.g. B. in stairs, elevators, steel or glass structures, meter marks are made on each floor. They are then approximately "+3.50", depending on the number of floors or the height of the building. As a result, industrial plants or high-rise buildings are given meter marks such as “+14.20” corresponding to their height. In lower-lying areas such as basements, underground garages, etc., the values are consequently negative, e.g. B. "−6.00". Meter markings do not always have a relation to the floor as in the example above, but often only mark a round height value.
The meter line is measured with a leveling device or rotating laser , less often with a tachymeter or theodolite . Hose or spirit levels are also traditionally used.
Since the meter mark is binding for all trades and the incorrect position can cause high material damage, the accuracy , clarity and durability of the marking are of great importance. It is therefore up to the site management to initiate the meter mark. It is an important piece of evidence in disputes regarding construction defects and warranties . On large construction sites, for such warranty reasons, a surveyor is often commissioned to create the meter plans.
presentation
In the floor plans and sections that are spot heights characterized by open (for prefabricated construction) or closed (for Rohkonstruktion) triangles.
