SETTING OF LZ AND LY

I am trying to learn the behaviour of LZ and LY parameters of CODE AISC UNIFIED 2016.

I notice that KLR is not changing accordingly with rx and ry.

               MC6X18: rx = 60.2 (for Ly); ry = 26.7 (for Lz)

STAAD results:

       when Lz = 1.0m → KLR = 37.34; Lz = 0.5m → KLR = 18.67

       when Lz = 1.0m → KLR = 37.34; Ly = 0.5m → KLR = 18.67

Manual Calc:

       when Lz = 1.0m → KLR = 37.34; Lz = 0.5m → KLR = 18.67

       when Ly = 1.0m → KLR = 16.61; Ly = 0.5m → KLR = 8.31

Do you any comments on this? Thank you!

****************MODEL******************

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 07-Dec-21
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 1 0 0; 3 0.5 0 0;
MEMBER INCIDENCES
1 1 3; 2 3 2;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.05e+08
POISSON 0.3
DENSITY 76.8195
ALPHA 1.2e-05
DAMP 0.03
G 7.88462e+07
TYPE STEEL
STRENGTH RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 2 TABLE ST MC6X18
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 2 PINNED
LOAD 1 LOADTYPE None TITLE LOAD CASE 1
MEMBER LOAD

***TRY DIFF COMBINATIONS WITH LZ AND LY
SELFWEIGHT Y -10
*SELFWEIGHT Z 10
PERFORM ANALYSIS
CHANGE
LOAD LIST 1
PARAMETER 1
CODE AISC UNIFIED 2016
METHOD LRFD

***LZ AND LY
LZ 0.5 ALL
*LY 0.5 ALL
FYLD 235000 ALL
CHECK CODE ALL
FINISH