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FIN EC software

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Load case

This window contains complete properties of the entered load case. Every load case is characterized by the name and by the ID code that is placed in front of the name. This ID code consists of the unique load case number and prefix. The prefix represents the type of load:

G

  • Permanent load

Q

  • Variable load

A

  • Accidental load

W

  • Variable load - wind

S

  • Variable load - snow

It means that first load case may have ID code G1 providing that the type of this load case is "permanent". ID code Q5 means that the load case represents the variable load and is placed on the fifth position in the list of load cases. ID code is used in the description of load combinations.

Code of load case

Code of load case determine the type of load that can be entered into the load case. These options are available:

Self-weight

  • Loads in this load case represent the self weight of the structure. These loads are generated automatically by the software. Only one load case with this code per project is permitted.

Force

  • Any forces or moments may be added into these load cases. The majority of loads are defined in the load cases with this code. The number of these load cases isn't limited.

Deformation

  • Deformations of supports may be added into these load cases. The number of these load cases isn't limited. Available only in programs "Fin 2D" and "Fin 3D".

Temperature

  • Thermal loads may be added into these load cases. The number of these load cases isn't limited. Available only in programs "Fin 2D" and "Fin 3D".

Load type

The load type represents the load character with regards to the variability in time. The range is based on the classification according to the chapter 4.1.1. of EN 1990. Variable loads are also divided in accordance with the table 2.1 of EN 1995-1-1 (design of timber structures).

Load factors

Partial load factors γf may be specified in this part. This factor takes account of the possibility of unfavourable deviations from the representative values of the load. Favourable (γf,inf) and unfavourable (γf,sub) effect of permanent loads shall be distinguished. Default values of factors are based on the table A1.2(B) of EN 1990.

Category

Range of available categories respects the sorting in the table A1.1 of EN 1990. This category is determinative for the selection of combination factors ψ0, ψ1 a ψ2 for variable loads. Category "User defined input" gives the option to specify arbitrary values of the combination factors.

Combination factors

The default values of these factors are based on the standard EN 1990 and depend on the category of the load case. Arbitrary values may be specified for the user defined input. Following factors are included:

ξ

  • Factor of permanent load reduction in alternative combination – factor for permanent loads that is used in the alternative combinations for ultimate limit states (combinations according to the formula (6.10b) of EN 1990).

ψ0

  • Factor of combination value of the variable load – combination factor for variable loads that is used in the combinations both for ultimate and serviceability limit states.

ψ1

  • Factor of frequent value of the variable load – combination factor for variable loads that is used in the accidental combinations and in the combinations for serviceability limit states.

ψ2

  • Factor of quasi-permanent value of the variable load – combination factor for variable loads that is used in the accidental combinations and in the combinations for serviceability limit states.

Left bottom corner shows the ordinal number of the load case. The order of load cases in the list of load cases may by changed with the help of this value.

Window "Load case"

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