Aluminium Sheet Fire Rating

This explains why the machining and sawing of.

Aluminium sheet fire rating. Uk aluminium industry fact sheet 11. Viii fire resistance of aluminum and aluminum alloys it is the purpose of this book to describe the facts regarding the behav ior of aluminum at very high temperatures including those as high as or. Impossible to set fire to aluminium cooking foil 6 to 7 microns thick with any type of flame. 3 the oxide film can form under very low pressures of oxygen approx.

Fire ratings of 45 120 minutes patented system features extruded aluminum framing with crisp edges and narrow sightlines custom aluminum face caps available to meet project needs easy installation requirements. The narrow aluminum profiles allow unlimited areas of glazing in interior and exterior fire separations. Aluminium structures have low fire resistance because of the low melting temperature of the alloy but aluminium is reflective and has a more than a twice lower surface emissivity compared with. Defined by bs476 part 4 aluminium alloys are non combustible part 7 surface spread of flame class 1 and part 6 fire propagation class 0.

The capacity of an element in a building structure to support a weight in addition to its own. So when aluminium is exposed to fire its large thermal conductivity allows it to quickly dissipate large amounts of heat from the flame and absorb even more thermal energy from the centre of the fire cooling the environment and restricting very hot spots. Ratings are assigned in levels from 1 to 8 with a level 8 rating being the highest able to stop a 7 62mm rifle lead core full metal copper jacket military ball. Aluminium s extremely high reflectivity compared to iron aluminium ranges between 80 to 90 and 5 to 25 for iron to stainless steel allows for better resistance to thermal radiation of fire.

In addition bs 476 part 3 covers external fire exposure roof tests and aluminium alloys are rated aa the highest possible under this classification system. 1 millibar and less and at high speeds of the order of 1 millisecond. Chapter 8 fire resistive materials and construction nfpa 5000 building construction and safety code nfpa quincy ma 2006. Specifications methods to determine fire resistance ratings for generic designs can be found in most building codes e g chapter 7 fire resistance rated construction international building code international code council falls church va 2003.

The attached photograph is a good example of the behaviour of aluminium in the massive form in a fire.