P 50 KN S. $ sa 56 59 3 m А B $10 511 Su 4 m 4 m 4 m 4 m Dimensions and loading of a truss beam are given in the figure.

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P 50 KN S. $ sa 56 59 3 m А B $10 511 Su 4 m 4 m 4 m 4 m Dimensions and loading of a truss beam are given in the figure. a) Calculate all the member forces of truss by using method of joints and list them in a table. b) Calculate the member forces of S2, Ss and Sio by using RITTER method of sections. c) Check the safety of the members S and Sun by using allowable stress 0 Load P is given as a value that varies with "a, b and The "a, b, c" letters denotes the last three digits of your Student ID number. P = 100 + a + 2b +3c [kN] Ex: If the Student ID is 020210123, then; a=1, b=2, c=3 and P = 100+1+(2x2)+(3x3)= 114 KN If c = 1, 3, 5, 7 or 9, then; Cross-sectional area of truss member Sis As=100cm Cross-sectional area of truss member Sun is Au=200cm? Oak = 1 kN/cm² (timber sections) If c = 0, 2, 4, 6 or 8, then; Cross-sectional area of truss member So is As=7cm? Cross-sectional area of truss member Siis Au=17cm al = 14.4 kN/cm² (steel sections)