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Frequently Asked Questions (FAQ)
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AnswerIn order to carry out a fire protection certificate in STEEL EC3, you must select a load case or a load combination in the "Fire protection" tab for which the fire protection certificate is to be carried out.As soon as you have selected a load for the fire protection certificate, an additional mask "Fire protection bars" or "Fire protection - Rod sets" appears in the module navigator on the left (if rod sets are to be dimensioned in the module case). In this screen 1.10 or 1.11 further settings for the fire protection proof of the component can be set.Further detail settings (eg. example required duration of fire protection, etc.) can also be found by pressing the [Details ...] button and selecting the "Fire protection" tab.Further information can be found in the manual for STAHL EC3.
AnswerThe modulus of elasticity of the material is reduced for the proofs according to EC 3, but not for the internal forces, since this is not intended according to the method of DIN EN 1993-1-2. It is always assumed that the structure is cold. In the calculation of the internal forces, one has to take into account only the internal constraint of temperature stress, if this is present.
AnswerThe method according to EC 3 can only be used for the temperature curves from EN 1990-1-2. In addition, with the simplified calculation of the steel temperature in the EC 3-1-2, it is only possible to take into account increasing temperature profiles; a drop in the temperature is not available in this simplified calculation. However, it is also possible to use direct steel temperatures in the program (see Figure 1).
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