FIRE RESISTANCE DESIGN FOR MODULAR SUPPORT SYSTEMS

Fire resistant applications, codes and design

Hilti MQ modular support system for medium-heavy applications fire test

At Hilti we have more than 25 years of experience researching and designing products to protect against fire.

We offer a wide range of fire resistant products including modular support systems, fastening technologies and fire protection systems.

These all make an important contribution to passive fire protection to help people leave buildings quickly and safely.

WHICH DESIGN METHOD TO USE FOR FIRE PROTECTION

Building industry and academic research shows that it’s unsafe to design modular support systems using the current design method from EN 1993-1-2 (Eurocode 3).

So what do you do?

If you don’t have any harmonized national design guidelines in your location to predict the deformation of these applications, then use products tested according to EN 1363-1.

Analysis of fire test results according to EN 1363-1

Hilti fire resistant design

There was a huge discrepancy in deflection between EC3 predictions and the test results for all the systems tested. This discrepancy generally starts to rise between 20-25 min ETK.

In many cases buckling can result in ultimate bending failure of the channel until high deformation leads to stiffening of the hanging system by catenary effect.

Hilti fire resistant design

In cases without noticeable buckling behaviour real deformations are also much higher than those predicted by EC3.

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HOW WE FIRE TEST OUR MODULAR SUPPORT SYSTEMS

At Hilti we have more than 20 years experience in fire testing.

We’ve carried out tests on our products according to EN 1363-1.

So, if you don’t have any harmonized design method in your region, you can be sure that your design using our Hilti solutions complies with EN 1363-1 tests.

We rigorously fire test our modular support systems to see how they behave and perform in fire conditions.

  • We carry out fire tests on pipe rings in accordance with the RAL Quality Directive RAL-GZ 656.
  • We fire test our channels based on the fire curve according to EN 1363-1.
  • Our fire tests are run by certified test laboratories, such as IBMB and MPA Braunschweig.

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