the wall of which is formed so as to receive and engage the extending portion of the insert application_number US 59406075 A description with the support illustrated in fig1 the structure 21 exerts its load on a top support member 1 which is the sliding side the load is transferred to a foundation 22 via a bottom support member 2 forming the swing side swinging movements of the structure are absorbed by the pressure pad 3 which is enclosed by the top support section 1 bottom support section 2 and a peripheral casing ring 4 the bottom support section 2 has a laterally convex shaped upper part 24 which extends inside the ring 4 the top support section 1 is supported on the pressure pad so that is can move horizontally whilst a sliding layer 5 preferably in the form of a boxed sheet of p v c or ptfe which serves to reduce the frictional forces is arranged between pressure pad 3 and top support section 1 ring 4 is pressed against the underside 6 of the top support member 1 a ptfe annular layer 7 is inserted between its front face and the sliding support member the transfer of forces from the pressure pad 3 to the ring 4 is effected by means of the spiral of wire 8a see fig5 embedded in the region near the top edge of the pressure pad 3 the spiral of wire 8a preferably vulcanized in situ with the formation of the pressure pad passes about the entire circumference of the pad between the top section of support 1 and the ring 4 within.