Arun Sharma Posted July 8, 2021 Share Posted July 8, 2021 (edited) Trig columns are a regular feature found in the UK countryside. Generally found on the tops of hills but can really be found almost anywhere that had [when erected in the 1930s] clear lines of sight to other exposed areas. These days their function has been supplanted by aerial photography and GPS mapping so the concrete columns can be a bit eroded and grubby. The most common sort is the tapering white concrete column about four foot tall which sits on a concrete box that is usually buried but may or may not be exposed - especially on eroded peat moors. They were used essentially as known positions from which theodolite sightings could be made to similar structures at some distance away. Each one contains a bronze bench mark and ID plate with a brass/bronze sighting arrangement on top. Most, but not all, are marked on OS maps by a small triangle with a dot in the centre. One that isn't marked is S2640 at grid SE 08013 00439 about a mile to the NE of Crowden. I measured this one [pictured below] and have produced a couple of 3D printed 4mm versions that now grace Churminster and Stowe Magna but 7mm cast resin versions will shortly be available from Radley Models. A picture of the 7mm master is attached. Edited July 8, 2021 by Arun Sharma addnl info 7 2 1 Link to post Share on other sites More sharing options...
Arun Sharma Posted July 10, 2021 Author Share Posted July 10, 2021 Being a simple shape with a slight chamfer on the sloping edges, it lends itself to home resin casting. Here is the master with a few of its resin clones and the mould. 1 Link to post Share on other sites More sharing options...
DGO Posted July 10, 2021 Share Posted July 10, 2021 Looks good, was Lego involved in the mould making process by any chance ? Link to post Share on other sites More sharing options...
Arun Sharma Posted July 10, 2021 Author Share Posted July 10, 2021 5 hours ago, DGO said: Looks good, was Lego involved in the mould making process by any chance ? Yes-the resin mixture doesn't stick to the plastic used in Lego blocks. Lego blocks also produce a pretty good seal between layers. 2 Link to post Share on other sites More sharing options...
br2975 Posted August 4, 2021 Share Posted August 4, 2021 Trig points and benchmarks........... takes me back to a former life; one I left 42 years ago. . Never thought I see one modelled. . Brian R Link to post Share on other sites More sharing options...
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