Protection of circular horizontal sheet metal ventilation ducts with Fibrogaine®
DUCTS TESTED ACCORDING TO NF / EN 1366-1 – CLASSIFICATION ACCORDING TO NF / EN 13501-3
The duct is composed of sections with a maximum length of 3,000 mm.
These components are joined with a 300 mm wide sleeve attached to the sections with 4.5 x 16 mm self-tapping screws spaced 200 mm apart around the perimeter of the duct.
The section joints are sealed using an A1 acrylic sealant. The duct body is supported with 1.20 m spacing (see diagram 1).
The support system is composed of (see diagram 2):
The half-brackets are contained in the duct body protection. The threaded rods can be protected by a rock wool shell (30 mm, 65/70 kg/m3) as well as FIBROGAINE® or by installing a grate and applying FIBROGAINE®. In both cases, the total thickness of the protection (shell + FIBROGAINE® or FIBROGAINE® only) will have a thickness identical to that applied to the duct.