Respected Sir,

Myself Chetan Arkasali,having some issues related to structural steel application. The deflection value for structural steel (ISMB 200, ISMB 100) obtained from analysis is higher for cantilever beam subjected to point load at free end,

Problem Description,

I have assigned Concentrated Load of 60 kN on free end of cantilever beam of length 1.5 meters and  S shaped ISMB 200 (Iz =21.16e6 mm^4, E=2.05e5). As per theoretical calculation deflection value was supposed to be 15.568 mm but in Staad Pro SS5,SS6 and also in connect edition it's showing 16.57 mm. Later i tried using create user table (Iz=22.048e6 mm^4) and ended with 15.935 mm in the place of 14.934 mm. So Confused with application of Steel Structure analysis

Stadd Editor File

STAAD PLANE
START JOB INFORMATION
ENGINEER DATE 18-Nov-18
END JOB INFORMATION
INPUT WIDTH 79
UNIT MMS NEWTON
JOINT COORDINATES
1 0 0 0; 2 1500 0 0; 3 0 1000 0; 4 1500 1000 0;
MEMBER INCIDENCES
1 1 2; 2 3 4;
START USER TABLE
TABLE 1
UNIT MMS NEWTON
WIDE FLANGE
userdefined
3176.88 200 5.7 100 10.8 2.20482e+007 1.80275e+006 94993.6 1140 1440 100 10.8
END
DEFINE MATERIAL START
ISOTROPIC STEEL
E 205000
POISSON 0.3
DENSITY 7.68195e-005
ALPHA 1.2e-005
DAMP 0.03
TYPE STEEL
STRENGTH FY 253.2 FU 407.8 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY INDIAN
1 TABLE ST ISMB200
MEMBER PROPERTY
2 UPTABLE 1 userdefined
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 3 FIXED
LOAD 1 LOADTYPE None  TITLE LOAD CASE 1
JOINT LOAD
2 4 FY -60000
PERFORM ANALYSIS
FINISH

Thanking You in advance

Regards

Chetan Arkasali