Distribution Box Installation: Put the distribution box on the installation surface, and align the position of the expansion bolts and tighten the screws. If the bridge structure is otherwise in good condition, it is desirable to minimize the ef- d which enables the sub-structure of the old joint to be left in place, avoiding the need to break. Flexible Connector - An elastomeric expansion joint is a specially designed section of pipe inserted within a rigid piping system to provide flexibility. Stress Relief - Pipe stress caused by thermal expansion/contraction or foundation settlement can be handled by expansion joints. These operating parameters are shown on the technical data sheet. Should these data be exceeded, we assume no responsibility. At temperature changes, the expansion joint components have to be heated up. s among persons engaged in its development at the time it was approved.