| 摘要 |
FIELD: construction, particularly vertical ducts for receiving utility lines. ^ SUBSTANCE: air duct assembly comprises air duct member having height corresponding to that of each floor or several building floor heights. The air duct members may be connected one over another so that they form single fire-protective space separated into several compartments and extending through several stories. Air-duct member has at least one longitudinal partition, which separates air-duct member interior into two separate fire-resistant soundproof chambers. ^ EFFECT: elimination of labor-intensive duct assemblage stages, possibility of duct transportation. ^ 8 cl, 4 dwg |
