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***NOTE - VERY WEAK SPRING ADDED FOR STABILITY

Dear All,

I received this warning after run analysis for my new platform.

Please help.

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 31-Dec-17
END JOB INFORMATION
INPUT WIDTH 79<# START DO NOT EDIT
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 0 7 0; 3 4.5 7 0; 4 4.5 7 3; 5 0 7 3; 6 3 7 3; 7 1.5 7 3; 8 3 7 0;
9 1.5 7 0; 10 4.5 7 2; 11 4.5 7 1; 12 0 7 2; 13 0 7 1; 14 0 5.8 0; 15 6 0 0;
16 6 5.8 0; 17 4.5 5.8 0; 18 6 7.6 0; 19 0 7.6 0; 20 0 7 1.5; 21 0 6 0;
22 4.5 7 1.5; 23 4.5 6 0; 24 4.5 7.6 0; 25 1.5 7 1; 26 1.5 7 2; 27 3 7 1;
28 3 7 2;
MEMBER INCIDENCES
1 2 9; 2 2 13; 3 5 7; 4 4 10; 5 9 25; 6 8 27; 7 13 25; 8 12 26; 9 14 17;
10 19 24; 11 15 16; 12 20 21; 13 22 23; 14 19 2; 15 17 23; 16 9 8; 17 8 3;
18 13 20; 19 20 12; 20 12 5; 21 7 6; 22 6 4; 23 10 22; 24 22 11; 25 11 3;
26 25 26; 27 26 7; 28 27 28; 29 28 6; 30 25 27; 31 27 11; 32 26 28; 33 28 10;
34 17 16; 35 24 18; 36 16 18; 37 2 21; 38 21 14; 39 14 1; 40 23 3; 41 3 24;
DEFINE PMEMBER
1 16 17 PMEMBER 2
2 18 TO 20 PMEMBER 4
3 21 22 PMEMBER 5
4 23 TO 25 PMEMBER 6
5 26 27 PMEMBER 7
6 28 29 PMEMBER 8
7 30 31 PMEMBER 9
8 32 33 PMEMBER 10
9 34 PMEMBER 12
10 35 PMEMBER 14
11 36 PMEMBER 16
12 PMEMBER 17
13 PMEMBER 18
14 37 TO 39 PMEMBER 19
15 40 41 PMEMBER 20
START USER TABLE
TABLE 1
UNIT METER KN
WIDE FLANGE
UUB203X102X23
0.00294 0.2032 0.0054 0.1018 0.0093 2.10645e-005 1.63961e-006 7.0496e-008 -
0.00109728 0.00189348
UUB406X140X39
0.00497 0.398 0.0064 0.1418 0.0086 0.00012516 4.10144e-006 1.08977e-007 -
0.0025472 0.00243896
END
DEFINE MATERIAL START
ISOTROPIC S275
E 2.05e+008
POISSON 0.3
DENSITY 76.9822
ALPHA 1.2e-005
DAMP 0.03
G 7.88462e+007
TYPE STEEL
STRENGTH RY 1 RT 1
END DEFINE MATERIAL
PMEMBER PROPERTY
2 4 TO 10 17 18 20 UPTABLE 1 UUB203X102X23
12 14 16 19 UPTABLE 1 UUB406X140X39
PMEMBER CONSTANTS
MATERIAL S275 ALL
SUPPORTS
1 15 PINNED
DEFINE REFERENCE LOADS
LOAD R1 LOADTYPE None  TITLE "LOAD GROUP 1"
SELFWEIGHT Y -1
END DEFINE REFERENCE LOADS
#> END DO NOT EDIT
LOAD 1 LOADTYPE Dead  TITLE DEAD LOAD
REFERENCE LOAD
R1 1.0
MEMBER LOAD
1 TO 4 16 TO 25 UNI GY -0.25
22 UNI GY -0.33
FLOOR LOAD
YRANGE 6.5 7.5 FLOAD -0.45 GY
MEMBER LOAD
1 16 17 22 UNI GY -0.5
LOAD 2 LOADTYPE Live  TITLE LIVE LOAD - OPERATING & SERVICE FLOOR
FLOOR LOAD
YRANGE 6.5 7.5 FLOAD -5 GY
PERFORM ANALYSIS
FINISH

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