Abstract: In antiseismic steel structural works of the frame type or of the truss type, which are constituted by columns and by girders fastened to the columns, the girders of different shapes show, at least in the vicinity of one of their extremities, a dissipative zone constituted by a reduction of the actual cross section. The reduction of the actual cross section consists either in differently shaped indentations in the edges of the flanges of the girder or in round or polygonal holes which are regularly distributed over the flanges and have a small diameter.

Abstract: A table for holding a body which lies thereon is pivoted on a transverse horizontal axis supported by a vertical upright attached and part of a stationary base frame. A cylinder connecting the base frame and table and parallel to the supporting vertical upright, when actuated by the operator via a remote controlled electrical switch, causes the table to rotate upon the horizontal axis from a horizontal position to a near vertical position.