In case of: monitoring of convergences in tunnels under construction and in underground cavities such as tunnels, caves, plano-altimetric variations in excavations outdoors, landslides and on unstable rock masses, for the structural controls on buildings and infrastructures, OTR provides the accessories for topography.

The use of sights, bolts, prisms for permanent installations are perfect for monitoring activity and find application in geotechnical, structural and civil field. They are fixed to the manufact that have to be monitored and ensure nice perfermances and accuracies during time.

How to placed them?            

Topographic accessories are placed and welded in the requie position. They don’t need any precaution axept of some caution in handling proces to avoid the brack down. In case them will be laied down, try to let them on a flat support.