Aluminium – effondrement Tour

Sujet qui prolonge  geostrategique.net  sur l’origine de l’effondrement des Tours du Wall trade Center aux USA

http://www.lemonde.fr/europe/article/2017/06/15/tour-grenfell-a-londres-la-colere-des-riverains-contre-un-incendie-qui-etait-inevitable_5144755_3214.html

 

https://www.theguardian.com/uk-news/2017/jun/15/cladding-in-2014-melbourne-high-rise-blaze-also-used-in-grenfell-tower

 

http://www.smh.com.au/national/what-is-cladding-and-why-it-is-used-on-buildings-20170615-gwrir6.html

 

WHAT IS CLADDING?

▪ Cladding is a type of « skin » or extra layer on the outside of a building.

▪ It can be attached to a building’s framework or an intermediate layer of battens or spacers.

CLADDING USES

▪ It is mainly used to stop wind and rain from entering the building.

▪ Cladding can also provide sound and thermal insulation as well as fire resistance.

▪ It is often used to make a building’s exterior look more attractive.

WHAT IS CLADDING MADE FROM?

▪ Wood, metal, brick, vinyl, composite materials that can include aluminium, wood, blends of cement and recycled polystyrene, wheat/rice straw fibres.

IS CLADDING FIRE RESISTANT?

▪ Excellent fire resistance cladding: brick.

▪ High fire resistance cladding: planks or weatherboards made from fibre cement or steel.

▪ Good fire resistance cladding: aluminium, reconstituted timber products.

▪ Poor fire resistance cladding: timber weatherboards, plywood sheets.

WHAT ARE THE ISSUES WITH ALUMINIUM COMPOSITE CLADDING PANELS?

▪ There is potential for fire to spread quickly upwards in a building if inappropriate products are used.

▪ The panels consist of two aluminium faces and a core material such as polyethylene, a mineral-based material, or a combination of both.

▪ Panels are between 3mm and 5mm thick.

▪ They may look similar on the outside, but their core materials may differ and affect their fire resistance.

▪ Panels with a higher proportion mineral core are considered to withstand fire better, but can still be considered combustible.

graphic

REGULATIONS

▪ Cladding is only required to meet the minimum standards under the Building Code of Australia.

▪ The National Construction Code (NCC) requires buildings to have elements such as non▪combustible external walls to stop fire spreading.

Sources: http://www.yourhome.gov.au; Australian Building Codes Board; NSW Government

AAP 

 

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