Item Brochure

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Datum and Axis Markers RS20 and RS21*
RS21r on a column. The protrusion is
cut in 4 – 5 times with a cutter.
RS21r glued, fastened, and painted to
prevent tampering.
Elastic “plaster brushes” to mark refer-
ence points securely until plastering
work is completed.
For plastering construction sites and to secure finished floor level (FFL) and axis.
The markers RS20 or RS21* are installed on an unplastered or unrendered wall to
provide a level datum or finish floor level to all tradesmen.
To avoid measurement differences when transferring, the markers have a ledge
to which a ruler can be applied, and a nail hole for horizontal consistency.
The elastic “plastering brushes” ensure that the surveying measurement is stable until
after plastering, and easy to locate. Heights and axis are also secured after plastering.
To avoid tampering, the corners are painted (see photo on page six).
After completing all work, the brushes can be easily pinched off, and the markers
remain under the plaster, if needed.
We recommend gluing the markers
and securing them at least once.
50 mm
80 mm
Datum Markers RS20/RS21
*self-adhesive
Protrusion 6 mm
Plastering brushes 28 mm