Building construction

Claim 1

A FORM OF BUILDING ROOF CONSTRUCTION COMPRISING: A CENTRAL SUPPORT, AN INNER ANNULAR RING SURROUNDING SAID SUPPORT, SAID INNER ANNULAR RING BEING OF A SIZE RELATIVE TO SAID CENTRAL SUPPORT TO ENABLE VERTICAL MOVEMENT THEREOF ON SAID SUPPORT, MEANS FOR FIXING SAID INNER ANNULAR RING TO SAID SUPPORT, AN OUTER ANNULAR RING SPACED CONCENTRICALLY FROM SAID INNER RING, RELEASABLE RESTRAINING MEANS FOR HOLDING SAID OUTER RING AGAINST MOVEMENT, A PLURALITY OF RADIALLY DISPOSED ELASTIC MEMBERS ANCHORED BETWEEN SAID INNER AND OUTER ANNULAR RINGS, SAID ELASTIC MEMBERS BEING STRAINED TO ELONGATION BY TENSILE STRESS, AND A CEMENTITIOUS COVERING ABOUT SAID ELASTIC MEMBERS AND BETWEEN SAID INNER AND OUTER RINGS, SAID COVERING BEING COMPRESSED RADIALLY BETWEEN SAID INNER AND OUTER RINGS BY THE RESTORING FORCE OF SAID STRAINED ELASTIC MEMBERS, SUBSTANTIALLY THE ENTIRE DEAD LOAD WEIGHT OF SAID ROOF, INCLUDING SAID RINGS, SAID ELASTIC MEMBERS AND SAID COVERING, BEING SUPPORTED BY SAID CENTRAL SUPPORT.