CLADDING COMPLIANCE Michael James Cladding Compliance Society of - - PowerPoint PPT Presentation

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CLADDING COMPLIANCE Michael James Cladding Compliance Society of - - PowerPoint PPT Presentation

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Society of Fire Protection Engineers (SFPE, NZ Chapter) www.sfpe.org.nz CLADDING COMPLIANCE Michael James Cladding Compliance Society of Fire Protection Engineers (SFPE, NZ Chapter) www.sfpe.org.nz CONTENTS Background How does

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CLADDING COMPLIANCE

Society of Fire Protection Engineers (SFPE, NZ Chapter)

www.sfpe.org.nz

Michael James

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www.sfpe.org.nz

Cladding Compliance

Society of Fire Protection Engineers (SFPE, NZ Chapter)

CONTENTS

  • Background
  • How does cladding perform in fire?
  • Testing cladding systems
  • The way forward
  • Solving the fire component
  • Conclusion
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www.sfpe.org.nz

BACKGROUND

Polystyrene Sandwich Panels

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BACKGROUND

– The Torch - Dubai

ACP Panels

Lacrosse - Melbourne Grenfell

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BACKGROUND

Non Aluminium Core

  • Polyethylene
  • 70 – 90% mineral

fibre plus polyethylene

  • Aluminium

honecomb

  • No core

ACP Panels

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www.sfpe.org.nz CLADDING PERFORMANCE IN A FIRE?

If this construction is combustible, it can burn as well Delamination

Melting and flaming droplets falling down

Heat Heat Burning upwards

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www.sfpe.org.nz HOW DOES CLADDING PERFORM IN A FIRE?

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www.sfpe.org.nz HOW DOES CLADDING PERFORM IN A FIRE?

ACP Panels

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TESTING CLADDING SYSTEMS

Cone Calorimeter test - ISO 5660

Peak heat release rate & Total heat release rate

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TESTING CLADDING SYSTEMS

“The cone calorimeter test is not a good indicator

  • f performance of the whole wall System.”
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TESTING CLADDING SYSTEMS

Intermediate/ full scale tests e.g NFPA 285

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TESTING CLADDING SYSTEMS

“The American NFPA 285 test is based around American construction methods and in New Zealand we do not generally build our external wall systems the same, so it is extremely difficult to extrapolate the performance of these tests to New Zealand conditions.”

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TESTING CLADDING SYSTEMS

American vs NZ Base wall Construction

Fibre cement sheet, not fire rated plasterboard 10mm standard plasterboard not fire rated plasterboard. Timber studs, not steel studs

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TESTING CLADDING SYSTEMS

Non combustible construction

Rubber seals

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THE WAY FORWARD

Cladding systems are very complex.

  • They need to be weathertight,
  • keep the building occupants warm in

winter

  • and cool in summer,
  • be durable,
  • be low maintenance,
  • be firesafe and
  • cope with wind and seismic loads.
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THE WAY FORWARD

This complex problem can only be solved using a collaborative approach involving the Architect, facade engineer, structural engineer, fire engineer and material and product suppliers.

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SOLVING THE FIRE COMPONENT

Option 1 - Change our wall construction methods to more closely align with how systems are tested in the full-scale tests. There are several products that are currently being tested for compliance in New Zealand for use as a rigid air barrier which would protect timber framing from becoming involved in a fire, so the base wall assembly could be considered non-combustible.

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SOLVING THE FIRE COMPONENT

Option 2 - Carry out full scale tests of the construction methods we use in New Zealand. This is feasible but very expensive because the tests are currently carried out overseas and we are a small market with limited product

  • consumption. We understand that Branz is

currently undertaking a feasibility study on constructing a test rig in New Zealand.

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SOLVING THE FIRE COMPONENT

Option 3 - Only build with non combustible

  • construction. Concrete, brick or glass for

example. This is not realistic given the many types and styles of buildings being designed and built.

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SOLVING THE FIRE COMPONENT

Option 4 - Change or clarify the regulations to recognise that low risk buildings and

  • ccupancies do not warrant the same level
  • f scrutiny on cladding performance as

higher risk areas. MBIE are currently looking at this.

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CONCLUSION

  • Cladding compliance is a complex topic

which requires input from multiple design professionals to achieve the right result.

  • Since this is a global problem we are not
  • n our own when it comes to

understanding the problems and potential solutions.

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BIBLIOGRAPHY

  • 1. MBIE guidance for aluminium composite panels May 2016, http://

www.building.govt.nz/assets/Uploads/building-code-compliance/c- protection-from-fire/Guidance-for-aluminium-composite-panels- may2016.pdf

  • 2. MBIE BC Update 234: Suspension of six aluminium composite panel (ACP)

CodeMark certificates. https://www.building.govt.nz/about-building- performance/news-and-updates/all-news-and-updates/bc-update-234/

  • 3. Grenfell Tower enquiry website https://www.grenfelltowerinquiry.org.uk/
  • 4. High Rise High Stakes – Lessons to be learned for New Zealand from

Grenfell Tower. Engineering New Zealand EG Magazine Issue 1/2017.

  • 5. Auckland Council ACP guidance. https://www.aucklandcouncil.govt.nz/

buying-property/Pages/aluminium-composite-panels-buildings.aspx http://

  • urauckland.aucklandcouncil.govt.nz/articles/news/2018/6/update-on-

acp-cladding/

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Cladding Compliance

Society of Fire Protection Engineers (SFPE, NZ Chapter)

THANK YOU!