FIRE RESISTANCE DESIGN FOR MODULAR SUPPORT SYSTEMS
Fire resistant applications, codes and design
![Hilti MQ modular support system for medium-heavy applications fire test](/content/hilti/A2/IN/en/engineering/design-center/modular-support-systems/design-guidelines/fire-resistant-design/_jcr_content/pagestageimage.img.1920.medium.jpg/1516618093697.jpg)
Analysis of fire test results according to EN 1363-1
![Hilti fire resistant design](/content/hilti/A2/IN/en/engineering/design-center/modular-support-systems/design-guidelines/fire-resistant-design/_jcr_content/mainSection/mainColumn/two_image_text_col/left/image.img.1920.medium.jpg/1482642695952.jpg)
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](/content/hilti/A2/IN/en/engineering/design-center/modular-support-systems/design-guidelines/fire-resistant-design/_jcr_content/mainSection/mainColumn/two_image_text_col/right/image.img.1920.medium.jpg/1482642695979.jpg)
In cases without noticeable buckling behaviour real deformations are also much higher than those predicted by EC3.