N Where the design strength of the concrete has been reduced of 50%less,N is the axial force applied to the column,and l.min is the minimum width of the column. Note that also in the Italian Code,the value of N need to be incremented by a factor B,which considers the position of the column in the structure itself(whether the column is central,on the sides or on the corners) Central column:B=1.0; Side column:B 1.1;B =1.2. In the evaluation of the weights,I considered also the parts of beams coming into the columns(i.e. 12 metres of beams for the central column,9 metres for the side columns and 6 metres for the corner columns). Here as follows the weights of the single floors have been computed on the way down,summing up the weights coming from the upper levels: WEIGHTS Floor Central column [kN] Side column [kN] Corner column [kN] 12 456.3 261.765 147.69 11 912.6 523.53 295.38 10 1368,9 785,299 443,0 9 1825.2 1047.06 590.76 22815 1308825 738.45 2737,8 1570,59 886,14 6 3194,1 1832.355 1033.83 3650,4 2094,12 1181,52 4106,7 2355,885 1329,21 4563 2617.65 1476.9 5019,3 2879,415 1624,59 5475.6 3141,18 1772.28 Here as follows are the minimum width of the column cross section,evaluated as written before: WIDTHS Floor Central column [mm] Side column [mm] Corner column [mm] 12 239,8014 181,6278 136.4275 11 339,1304 256,8605 192,9377 415,3483 314,5886 236,2994 9 479,6029 363,2556 272,8551 Where the design strength of the concrete has been reduced of 50% less, N is the axial force applied to the column, and is the minimum width of the column. Note that also in the Italian Code, the value of N need to be incremented by a factor , which considers the position of the column in the structure itself (whether the column is central, on the sides or on the corners): Central column: ; Side column: ; In the evaluation of the weights, I considered also the parts of beams coming into the columns (i.e. 12 metres of beams for the central column, 9 metres for the side columns and 6 metres for the corner columns). Here as follows the weights of the single floors have been computed on the way down, summing up the weights coming from the upper levels: Here as follows are the minimum width of the column cross section, evaluated as written before: WIDTHS Floor Central column [mm] Side column [mm] Corner column [mm] 12 239,8014 181,6278 136,4275 11 339,1304 256,8605 192,9377 10 415,3483 314,5886 236,2994 9 479,6029 363,2556 272,8551 WEIGHTS Floor Central column [kN] Side column [kN] Corner column [kN] 12 456,3 261,765 147,69 11 912,6 523,53 295,38 10 1368,9 785,295 443,07 9 1825,2 1047,06 590,76 8 2281,5 1308,825 738,45 7 2737,8 1570,59 886,14 6 3194,1 1832,355 1033,83 5 3650,4 2094,12 1181,52 4 4106,7 2355,885 1329,21 3 4563 2617,65 1476,9 2 5019,3 2879,415 1624,59 G 5475,6 3141,18 1772,28