THREE-DIMENSIONAL TRUSS Russian patent published in 1998 - IPC

FIELD: construction engineering. SUBSTANCE: this can be used in load-bearing structures of covering for single-storey industrial buildings and structures, and other spanned structures. Three-dimensional truss is of triangle cross-section and has girths located in tops of triangle connected by grate. In cross-section they form equilateral triangle. Girths and grate members are made of steel equal-flange angular profiles which are made up of two flanges and annular segment. Upper girth is divided into panels of dimensions decreasing in geometrical progression in direction from supports. Spread struts are made parallel to extreme strut above support. Girths and members of grate are made of similar profiles. Alternately, lower girth is made of two butt-joined profiles, and free flanges at base create unfolded angle equal to 180 deg. EFFECT: higher efficiency. 1 cl, 3 dwg