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Safety factors

From version 3,117 , WinTess introduces a new way to apply the safety factors to the structures.
NOTE: Although this method is much more versatile and is better suited to the modern normative, if preferred, the user can ignore it and continue to calculate as it was before the version 3,117.


Window of safety factors is seen above. The coefficients are grouped in two columns:

It is an escalating coefficient. That is to say that the loads are multiplied by this value. By default the value is 1, so that if you do not change, the calculation is done as always.
On the other hand, if this value is changed, it must be borne in mind that results (reactions, displacements, etc. ) will be affected by this value.
If you are analyzing what standards or codes define as SLS (Serviceability Limit State), these coefficients tend to be all equal to 1.

It’s a reduction coefficient., i.e. the resistance of the materials are divided by this value. By default, these values are the same as, what WinTess3, until version 3.117, regarded as typical values (membrane = 5, tube = 1.65, cables = 3).

Apply default values
By this button, all the boxes of the safety factors are filled with the default values entered in the options window.

If you are analyzing what the standards or codes define as ULS (Ultimate Limit State), the program multiplies the values of the safety factors of the loads and materials by obtaining a Global Safety factor for that object, and uses this value for the calculation of the ratio of all the objects in the structure: membrane, cables, pipes, …