Simple design methods to determine load-bearing capacity are available for steel tension, compression and beam members. If a uniform temperature distribution is assumed through the member then the calculation is simply based on a reduction in yield strength. Simple calculation methods are available to take into account varying temperature distribution through the member and along the member's length.

The design of steel members is based on the engineering principles applied in the normal cold design except the effects of reduction in material strength and stiffness are taken into account, together with partial safety factors that relate to the fire limit state.

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