Nullifire FB 750 Fire Barrier and penetrations with Nullifire FS 702 mastic sealant

The blank fire barrier consists of one or two layers of 50 mm thick Nullifire FB 750 batt either friction fit into a wall aperture or fixed to the face of the wall over the aperture and sealed to the wall with a fillet of Nullifire FS 702 mastic. For two layers, the batt may be laminated together or separated by 20 to 30 mm. The fire barrier may be penetrated by a range of structural steel, copper and steel pipes or power and communication cable penetrations and sealed to the barrier with Nullifire FS 702 mastic as described.

The walls may be either concrete or masonry walls including AAC walls, for example, Hebel, at least 110 mm thick or plasterboard-lined walls with at least two layers of 12.5 mm thick fire rated plasterboard and at least 70 mm wide steel studs or 95 mm deep timber studs with the apertures in the walls also lined with the same two layers of plasterboard. The concrete floors are at least 120 mm thick.

It is also considered the walls may be of Speedpanel or KOROK panel construction, but the fire resistance of the blank panels and penetration systems listed in the tables would be limited to the following maximum FRL:

• -/60/60 for a 51 mm thick Speedpanel or KOROK wall
• -/90/90 for a 64 mm thick Speedpanel wall
• -/120/120 for a 78 mm thick Speedpanel or KOROK wall

AS 1530.4:2014 and AS 4072.1-2005