Problem 2 (iii): What is the effective length of the column CF? (m)

Problem 2 (iii): What is the minimum required gross area, A_g, based on yielding, considering the yield strength, F_y, of the selected section? (mm²) 

Problem 2 (v): What is the minimum required effective net area, k_teA_n, based on fracture, considering the ultimate strength, F_u, of the selected section? (mm²)

Problem 1 (iv): What is the design tension capacity, ΦN_t, considering the fracture criteria? (kN)

Problem 2 (vi): What is the effective net area, k_teA_n, of the selected PFC? (mm²)

Problem 2 (iv): Based on the AISC Table D3.1 Case 2 given in the class notes, what is the distribution factor, k_te, or shear lag factor, U, for the selected PFC? 

Problem 2 (ii): What is the lightest PFC that satisfies the yield and fracture demands? (Note: Consider the steel grade!). Trial and error is needed!

P.S.: Only input the number of the selected PFC section, i.e., 200 for 200PFC.

Problem 2 (i): What is the design load, N*, of the critical load combination? (kN)

Problem 1 (iii): What is the design tension capacity, ΦN_t, considering the yield criteria? (kN) 

Problem 1 (i): What is the minimum value of the pitch, S_P in mm? Note: This is a multiple of 5mm for the construction drawings.