Stainless Steel bushes orientated in three directions, horizontal, vertical and lateral with respect to the concrete or rock surface, accept either a digital or dial depth gauge, which precisely measures the distance to corresponding stainless steel anvils. Comparison of readings with base data indicates the direction and magnitude of movement. Each joint movement indicator comprises two parts, each a hot zinc coated steel arm with a coated reinforcement bar anchor stem. One arm incorporates the bushes, the other the measuring face.

The Triaxial Jointmeter is reliable, accurate and relatively simple to install and read. It can be used to monitor movement across most joints, with the qualification that for increasingly acute internal angles (i.e. less than 90°), the anchor stems must be correspondingly increased in length to ensure sufficient penetration into the parent material for effective bonding and cut-outs must be made in the parent material to allow adequate access to the instrument for monitoring purposes.

Product Features