Bending is about the x-axis of each member. Determine the value for G (that would be used for GA or GB in the alignment charts) at point F in the frame.Girders BF, CG and DH are W18 x 55 and have a length of L1 = 22 ft.Girders FJ, GK and HL are W21 x 55 and have a length of L2 = 28 ft.Columns AB, EF and IJ are W10 x 68 and have a length of L3 = 14 ft.Columns BC, FG and JK are W10 x 49 and have a length of L4 = 10 ft.Columns CD, GH and KL are W10 x 30 and have a length of L4 = 10 ft.

Which of the following slenderness ratios is the controlling value used in determining a column’s compressive strength?

A column is fabricated by bolting a 5/8 x 6 plate to the top and bottom of a W14x82. Determine the moment of inertia about the x axis.

Can an A992 steel WT8 x 25 column with an effective length of 16 feet in both directions support a dead load of 100 kips and a live load of 60 kips? Use LRFD.

Bending is about the x-axis of each member. Determine the value for G (that would be used for GA or GB in the alignment charts) at point F in the frame.Girders BF, CG and DH are W18 x 55 and have a length of L1 = 26 ft.Girders FJ, GK and HL are W24 x 68 and have a length of L2 = 28 ft.Columns AB, EF and IJ are W10 x 88 and have a length of L3 = 16 ft.Columns BC, FG and JK are W10 x 45 and have a length of L4 = 10 ft.Columns CD, GH and KL are W10 x 26 and have a length of L4 = 10 ft.

A W14x61 made with A992 steel is pinned at both ends and braced in the weak direction as shown. Can it support a dead load of 120 kips and a live load of 120 kips? Use LRFD. Let L1 = 24.4 ft, L2 = 8.4 ft, and L3 = 16.0 ft.

A column is fabricated by bolting a 3/4 x 6 plate to the top and bottom of a W14x82. Determine the moment of inertia about the y axis.

A column is fabricated by bolting a 1 x 6 plate to the bottom of a W14x370. Determine the distance from the bottom of the plate to the centroid of the composite cross section.

In the first Abilene Paradox video (animated), how was the drive to Abilene described?  

The designer should provide extra support for the weak direction of a column. Otherwise the member will be inefficient.