FIELD: construction.
SUBSTANCE: combined sound-insulating element for closing openings includes a web made in the form of a multilayer structure and a box of aluminium profiles. Cloth is made in the form of a multilayer structure enclosed in a frame made of aluminium profiles closed along the perimeter and containing, starting from the outer front surface, successively arranged layers formed by glass-magnesite sheet, polyester fibre, glass-magnesite sheet, polyurethane. Joint between the frame of the combined sound-insulating element closed along the perimeter and the box framing the opening is double-circuit and includes a rubber seal pressed by a magnetic bar. Front glass-magnesite sheet on the outer side of the web can have thickness of 12.5 mm, the inner glass-magnesite sheet can have thickness of 8 mm, the polyester fibre can have a surface density of 250-350 g/m2 and is used in the form of a spacer with thickness of 4 mm, elastic polyurethane can have density of 50 kg/m3 and layer thickness of 10 mm.
EFFECT: disclosed is a combined sound-insulating element for closing openings.
2 cl, 4 dwg
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