4. Determine whether the beam shown below is adequate for the given loads considering bending using both LRFD and ASD. The loads are service loads and the steel is A992. Per AISC Specifications, the given beam section is compact for flexure. P,=10k P = 15k P,= 10k P = 15k W18x50 Flateral brace 10'-0" point 10'-0" L=30'-0"

A steel plate (called a cover plate) having cross-sectional dimensions W2 8.0 in. x 0.7 in. is welded along the full length of the bottom flange of a W, 12.0 in. x 14.0 in. wide-flange beam (see the figure, which shows the beam cross section). I W2 cover plate What is the percent increase in the smaller section modulus (as compared to the wide-flange beam alone)? Round your answer to two decimal places. % in smaller section modulus =|

If you can't solve this question just skip it but don't say this is an assignment question.

Question 4: Select an appropriate W310 section of ASTM A992 steel (F, = 345 MPa) as the beam-column in an unbraced frame subjected to the factored loads, including biaxial bending moments, as shown in Fig. 4. The beam-column is laterally braced at the two ends only. (Hint: I would start with W310x118 and then decide if this is an appropriate choice or a heavier/lighter section is necessary depending on the outcome of checking interaction equations.) 1040 kN 1040 kN 125 kNm 85 kNm W310 W310 7000 %3D II 235 kNm 50 kNm 1040 kN 1040 kN Figure 4