At the Forge: Session Management with Mason

PCT No. PCT/FR81/00014 Sec. 371 Date Oct. 7, 1981 Sec. 102(e) Date Oct. 7, 1981 PCT Filed Feb. 6, 1981.The hanging device comprises rigid strap hanging members to which the straps are secured, each formed at its upper part with transversally spaced hook-shaped openings to be hooked on transversal hooking members identically spaced arranged within a rigid suspending hollow girder having the shape of an inverted U.