Cracks, take the right measures
Table of contents
The purpose of the G6 gauge is to measure variations in the opening and rotation of the edges of a crack, or of any sort of joint, in a single plane.
The combined use of 2 verniers, for translational movement and rotation, allows the device to indicate the variations in distortion subject to different types of stress.
This G6 Saugnac Gauge is based on the same two concepts:
The plate of the G6 gauge is 1 mm thick PVC. It is 120 X 95 mm.
The force necessary to move the device is 20 g for traction and 35 g for rotation.
A : Axis of rotation , B : Crack
NB : A 1 division variation on the circular scale corresponds perceptibly to 3.3 mm of vertical differential movement when the pointer T of the vernier indicates a value near 10.
The G6 gauge can be protected by a sheet of transparent PVC 150 X 300 X 1.1 mm.
Fixing the G6 gauge and its protective cover with plugs and screws
On smooth surfaces, partitions, interior walls with paint, wallpaper or thin plaster coating, use of the self-adhesive tabs will be sufficient.
For damp surfaces lacking adhesion properties or on surfaces not capable to receive adhesive tabs, use mechanical fixings such as impact anchors.
To measure and record complex changes in a joint or crack in several perpendicular planes we recommend using G6 gauges placed at right angles to each other, attached if necessary, to angle bars (plate and sliding tongue). Movements are thus analysed by several verniers.
Example of installation in a special case necessitating using a form of extension and a widened surface to which to affix the plate. Ingenious installation stratagems, usually simple, are required in certain cases. Examples of installation Complex cracks
Example of installation with extension
Complex cracks require using several G6 gauges to analyse the phenomenon that caused the damage.
Glue rapid hardening in twin syringe
Kit for mechanical fixing to the structure wherever the condition of its surface does not allow the use of self-adhesive tabs (1 drill + 1 screwdriver + 30 impact anchors)
Impact anchors pack for mechanical fixing to the structure wherever the condition of its surface does not allow the use of self-adhesive tabs (pack of 50 units)
For measuring the variation in a crack in a vertical or horizontal internal angle (with self-adhesive tabs and 1 impact anchor).
Transparent PVC protection when the G6 gauge is being used in busy areas, schools or public places. Delivered with impact anchors.
Protection with anti-UV filter for G6 gauges fixed outside. Delivered with impact anchors.