Please do check my design (steel design parameters specially)

Dear sir,

Greetings!!

Please help me out from this as i am design a peb structure in staad pro its showing fail on 16 mm of web and flange thickness, but my seniors are saying (as per their experience basis only) that the column and rafter will be only on 8 mm web and 10 mm flanges, how its possible 

please help me out and please check my model and make my correct my mistake in the design !!

and specially please check the parameters "Ly, Lz, UNT & UNB

thanks in advance !!

STAAD PLANE
START JOB INFORMATION
ENGINEER DATE 09-Aug-18
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 0 10 0; 3 50.3 0 0; 4 50.3 10 0; 6 25.15 14.7 0; 7 6.2875 11.175 0;
8 12.575 12.35 0; 9 18.8625 13.525 0; 10 31.4375 13.525 0; 11 37.725 12.35 0;
12 44.0125 11.175 0;
MEMBER INCIDENCES
1 1 2; 4 3 4; 5 2 7; 6 6 10; 7 7 8; 8 8 9; 9 9 6; 10 10 11; 11 11 12; 12 12 4;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.05e+008
POISSON 0.3
DENSITY 76.8195
ALPHA 1.2e-005
DAMP 0.03
TYPE STEEL
STRENGTH FY 253200 FU 407800 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 4 TAPERED 0.7 0.016 0.7 0.25 0.025 0.25 0.025
5 6 TAPERED 0.8 0.016 0.6 0.25 0.016 0.25 0.016
7 8 10 11 TAPERED 0.6 0.016 0.6 0.25 0.016 0.25 0.016
9 12 TAPERED 0.6 0.016 0.8 0.25 0.016 0.25 0.016
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 3 PINNED
DEFINE 1893 LOAD
ZONE 0.24 RF 4 I 1 SS 2 ST 1 DM 2
SELFWEIGHT 1
MEMBER WEIGHT
1 4 TO 12 UNI 0.87
LOAD 1 LOADTYPE Seismic TITLE eq
1893 LOAD X 1
LOAD 2 LOADTYPE Dead TITLE d.l
SELFWEIGHT Y -1 LIST ALL
MEMBER LOAD
1 4 TO 12 UNI GY -0.87
LOAD 3 LOADTYPE Wind TITLE wl 1
MEMBER LOAD
1 UNI GX 7.3
5 7 TO 9 UNI Y 5.68
6 10 TO 12 UNI Y 3.24
LOAD 4 LOADTYPE Wind TITLE wl 2
MEMBER LOAD
1 UNI GX 4.06
5 7 TO 9 UNI Y 8.921
6 10 TO 12 UNI Y 6.49
4 UNI GX 3.24
LOAD 5 LOADTYPE Wind TITLE wl3
MEMBER LOAD
1 UNI GX -5.68
5 7 TO 9 UNI Y 8.92
6 10 TO 12 UNI Y 6.49
4 UNI GX 5.68
LOAD 6 LOADTYPE Wind TITLE wl4
MEMBER LOAD
1 UNI GX -2.43
5 7 TO 9 UNI Y 5.68
6 10 TO 12 UNI Y 3.24
LOAD COMB 7 Generated AISC GENERAL 1
2 1.0
LOAD COMB 8 Generated AISC GENERAL 2
2 1.0 3 1.0
LOAD COMB 9 Generated AISC GENERAL 3
2 1.0 4 1.0
LOAD COMB 10 Generated AISC GENERAL 4
2 1.0 5 1.0
LOAD COMB 11 Generated AISC GENERAL 5
2 1.0 6 1.0
LOAD COMB 12 Generated AISC GENERAL 6
2 1.0 1 0.7
LOAD COMB 13 Generated AISC GENERAL 7
2 1.0 1 -0.7
LOAD COMB 14 Generated AISC GENERAL 8
2 1.0 3 0.75
LOAD COMB 15 Generated AISC GENERAL 9
2 1.0 4 0.75
LOAD COMB 16 Generated AISC GENERAL 10
2 1.0 5 0.75
LOAD COMB 17 Generated AISC GENERAL 11
2 1.0 6 0.75
LOAD COMB 18 Generated AISC GENERAL 12
2 1.0 1 0.525
LOAD COMB 19 Generated AISC GENERAL 13
2 1.0 1 -0.525
LOAD COMB 20 Generated AISC GENERAL 14
2 0.6 3 1.0
LOAD COMB 21 Generated AISC GENERAL 15
2 0.6 4 1.0
LOAD COMB 22 Generated AISC GENERAL 16
2 0.6 5 1.0
LOAD COMB 23 Generated AISC GENERAL 17
2 0.6 6 1.0
LOAD COMB 24 Generated AISC GENERAL 18
2 0.6 1 0.7
LOAD COMB 25 Generated AISC GENERAL 19
2 0.6 1 -0.7
PERFORM ANALYSIS PRINT ALL
PARAMETER 1
CODE AISC
FYLD 250000 ALL
LY 1.5 MEMB 5 TO 12
LZ 50.3 MEMB 5 TO 12
UNB 1.5 MEMB 5 TO 12
UNT 1.5 MEMB 5 TO 12
CHECK CODE ALL
PARAMETER 2
CODE AISC
STEEL MEMBER TAKE OFF LIST ALL
FINISH