FIELD: construction.
SUBSTANCE: invention relates to rack supporting structure of suspended ceiling and to working process of rack processing. Rack has elongated in longitudinal direction (L) shape and includes at least two sections (5, 6) of sheet metal, arranged side by side or overlapping, in contact or connected to each other along said longitudinal direction (L). In rack transverse direction (T) is formed, passing transverse or crossing said longitudinal direction (L).
EFFECT: at least one of sections (5, 6) of sheet metal has notches (9), forming partially cut parts (10, 10A, 11, 11A), wherein partially notched part (10, 10A, 11, 11A ), at least, one of sections (5, 6) of sheet metal extends in direction of second of said sections (5, 6) of sheet metal, determinating interaction of parts, and wherein notches (9) are arranged, directed or passing along said crosswise direction (T).
10 cl, 19 dwg
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