As the name suggests, this a strict and very stiff structured way of having a capsule. (texturecharmscolour.de)
Connecting a roll cage to the suspension pick - up points makes for a very stiff structure. (evo.co.uk)
Stiff structures in the dashboard presented an elevated risk of injury to knees and femurs, which the fitted knee airbag was unable to mitigate. (euroncap.com)