WORKING PRINCIPLE

The gap is bridged by cantilever fingers. Solid and fatigue-resistant finger elements with a maximum length of 2 m are bolted in two rows to the rigid cast in steel sub-structure. Anchorage is done by reliable non-tensioned diaphragm/loop elements (and due to fatigue-safety not by post-tensioned anchors as some older finger joint designs).

Below the fingers a generously dimensioned and mechanically clamped, replaceable gutter made from reinforced elastomer, (in conveyor belt quality) takes care of prompt and safe drainage into a bridge duct system, thus also granting additional safety against aquaplaning. This gutter requires low maintenance, and is largely self-cleaning due to it's optimal slope; it can also be easily cleaned through the gaps between the fingers with high pressure water.

The surface of the fingers is coated with a special grip material. This grip coating consists of high abrasive and extreme hard special gravel embedded into epoxy-resin, which further reduces the already low noise level and grants unequalled skid resistance. This coating offers unique riding comfort in connection with the rather broad design. Cable ducts and similar attachments to pavement areas can be easily managed by means of a compact sliding plate design.

Solid and rigid execution of all details and the absence of wearable parts enables proper function throughout the full life period of the whole structure.

TRANSGRIP Finger-joints designed in conjunction with a concrete transition strip on both sides can be installed after surfacing of the structure and adjacent trafficked area, and therefore offer best riding comfort due to the avoidance of level differences.The connection to a watertight membrane is achieved by a hot joint filler.

Designed directly with pavement connection, it has a generously dimensioned steel angle piece to connect to the membrane, which can be equipped with a mechanical clamp on demand.

Rigid steel sub-structures have large scale openings for the pouring and vibrating of cast-in concrete. Non-assembled delivery is possible for lane by lane installation. Galvanised lost formwork is supplied in any case.

If required the membrane, which draws off water, can be delivered detachable from top or bottom. Additional maintenance openings can be situated in the pavement area.