Structural collapse as a result of fire is rare, but it can, especially in case of high rise buildings, lead to high property loss. For buildings with a risk of high financial damages, such as tall buildings, there may be a need to show that the building can withstand a complete natural fire without structural collapse, by e.g. using simulation and calculation methods. Such methods and guidance on how to use these are available for structures made of concrete and steel. Hereby, the structure is assessed against design fire exposures which are expected in a potential fire of the specific building or building design. However, such methods and guidance on how to use them is lacking for tall timber buildings. The risk of collapse is dependent on the fire exposure and properties of the structure. When timber is the structural material, the structure can have an influence on the fire exposure as timber can contribute to the fire as fuel. Therefore, successful structural design methods should include the contribution of timber to the fuel of the fire.