Results from experimental and theoretical studies indicate that required fire resistance, in the practical region, can be obtained for hollow structural steel columns filled with three types of concrete-filling: plain concrete, bar reinforced concrete and steel fibre reinforced concrete. Case studies illustrating the use of concrete-filling, as a means of providing fire protection, to hollow steel columns are presented for the Museum of Flight in Seattle, Washington and a school building in Hamilton, Ontario.Les r\ue9sultats de \ue9tudes exp\ue9rimentales et th\ue9oriques montrent qu'il suffit de remplir les poteaux de charpente m\ue9talliques de b\ue9ton pour leur assurer une r\ue9sistance au feu. Ce b\ue9ton peut \ueatre de trois types : ...