FRAMELESS TWO-LAYERED ARCHED BUILDING STRUCTURE OF THIN COLD-FORMED PROFILED MEMBERS Russian patent published in 2006 - IPC E04B1/32 

FIELD: building, particularly arched structures, vaulted structures and folded structures.

SUBSTANCE: building structure comprises cold-formed profiled members produced of thin roll and connected with each other by folded lock joint forming so that the first lower layer is created. Building structure also has the second upper layer of thin profiled members connected with the first layer through perforated spans fastened to projected folds of lower layer by means of tap-bolts and to upper layer by means of sheet cleats. The first cleat ends are fastened in spans, other ones are secured in each third profile of upper sheet and are built in folded lock joint. Both layers are aligned with foundation trough sheet covering plates by means of bolts. The covering plates are installed at different levels with the use of additional thin profiled member having 500 mm length. The levels are spaced 150-200 mm one from another.

EFFECT: increased load-bearing capacity.

5 cl, 9 dwg