as for the construction of blocks of differential settlement joints and joints control resulting from application of these blocks.

摘要

1489020 Expansion joints for cast structures J D THIRY 17 June 1975 [21 June 1974] 25798/75 Headings E1B and E1G A block for relieving stresses between two cast slabs of concrete has a generally trapezoidal longitudinal transverse cross section and projecting reinforcing bars 2 extending in a closed loop from an inclined face 5 to the smaller adjacent one of the parallel faces, for use blocks are arranged in line in the lower region of the joining slabs with the reinforcement hoops 2 alternately projecting on opposite sides and with resilient pads 4 between each block and also on each inclined face without reinforcement projecting so that each alternate block is keyed to the opposite cast slab. Joints using the blocks may be formed in roads, runways, tunnels or other buildings.