Slenderness in beam query

Dear,

Why is reported slenderness different in the report and the beam query?

  • Which STAAD.Pro version? Can you attach that model?



  • Version 22.00.00.015

    STAAD SPACE
    
    INPUT WIDTH 79
    UNIT METER KN
    JOINT COORDINATES
    1 0 0 0; 2 8 0 0;
    MEMBER INCIDENCES
    1 1 2;
    SUPPORTS
    1 PINNED
    2 FIXED BUT FX MY MZ
    DEFINE MATERIAL START
    ISOTROPIC STEEL
    E 2.05e+08
    POISSON 0.3
    DENSITY 76.8195
    ALPHA 1.2e-05
    DAMP 0.03
    TYPE STEEL
    STRENGTH RY 1.5 RT 1.2
    END DEFINE MATERIAL
    MEMBER PROPERTY EUROPEAN
    1 TABLE LD L150X150X15 SP 0.015
    CONSTANTS
    MATERIAL STEEL ALL
    LOAD 1 LOADTYPE None  TITLE LOAD CASE 1
    JOINT LOAD
    2 FX -10
    PERFORM ANALYSIS PRINT STATICS CHECK
    PARAMETER 1
    CODE EN 1993-1-1:2005
    SGR 2 ALL
    CHECK CODE ALL
    FINISH

  • I think in the Member query box a local slenderness lambda is reported which is being calculated as per cl. 4.7.9 and 4.7.10 of BS 5950.