Report number: FAR-4812-TO
Date issued: 27 Mar 2018
3M Fire Barrier Duct Wrap 615+
Description
3M Fire Barrier Duct Wrap 615+, nominally 38 mm thick, applied to horizontal and vertical steel ducts, including an access hatch.
Steel ducts with one layer of nominal 38 mm thick 3M Fire Barrier Duct Wrap 615+, constructed similarly to those referenced in FAR 4812-TO [2018], or in accordance with AS 4254.2-2012, subject to a minimum steel thickness of 0.8 mm and a minimum joint rating of J3.
Horizontal ducts may be up to 1,250 mm wide x 1,000 mm high, passing through steel-framed, plasterboard-lined or concrete or masonry walls, as described in FAR 4812-TO [2018], having at least -/180/180 FRL.
Vertical ducts may be up to 1,250 mm x 1,000 mm, passing through concrete floors, as described in FAR 4812-TO [2018], having at least 240/240/240 FRL.
The ducts may include an access hatch, as shown in Figure 3 and Figure 4 of FAR 4812-TO [2018], with maximum aperture dimensions of 510 mm x 510 mm.
Where the FRL of the wall or floor through which the duct passes is less than the nominal FRL of the duct, the FRL of the duct is limited as described in Section 3.9 of FAR 4812-TO [2018].
Building Code and Standards
AS1530.4-2014