FIELD: engineering elements.
SUBSTANCE: invention relates to a reinforcing assembly for air ducts (20), containing a spiral reinforcement bar (1) with an outer contour for forming an inner cylindrical contour of the air duct, wherein at least one connecting element (3) is provided to secure the spiral pitch formed by the spiral reinforcement bar (1), wherein said connecting element (3) is attached to the spiral reinforcement bar (1) by several connections (4) located spaced from each other.
EFFECT: invention facilitates installation.
10 cl, 9 dwg
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