What is a datum line?
What is a datum line?
Drawing for Understanding, Creating Interpretive Drawings of Historic Buildings, published by Historic England in 2016 defines a datum line as: ‘A horizontal or vertical reference line used to control height and horizontal distance measurements.’ Related articles on Designing Buildings Wiki
What is an OSG datum?
OSG is the standard known grid across the UK . For more information see: Ordnance datum . A datum may also be a line from which all other horizontal dimensions relate to whether, on architectural or engineering drawings. An example is a building that has a plan generated from a back wall .
What is a datum level in construction?
Datum On a construction project, a datum level is an arbitrary horizontal plane of reference from which all vertical dimensions are measured. It can show the vertical height difference between floor levels of a building as well as differences in levels between one part of the site and another.
What is a datdatum level in civil engineering?
Datum levels are useful as they provide points of reference to allow the vertical setting out of buildings and how they relate to other levels on a site. They should be clearly indicated on all relevant drawings with all levels described in metres to three decimal places but always as positive numbers because they are above datum level.
