Steel Design

A 6-m steel column is used to support an axial compressive load of 640 kN. If its ends are pinned, determine its effective length.

• a. 600 cm

• b. 3 m

• c. 600mm

• d. 60 cm

The moment of inertia of a 6 m - steel column is  $16300\ cm^4$  about the strong-axis and   $2340\ cm^4$  about the weak axis. If its area is  $9420\ mm^2$ , calculate its critical buckling load. Assume that the column is pinned at both ends.

• a. 8937 kN

• b. 2336 kN

• c. 1283 kN

• d. 894 kN

A 7 m - long column fixed at its base and pinned at its top has radii of gyration of 135 mm and 77.3 mm about its principal axes. How far from the top should a lateral bracing be placed so that the buckling capacity in each principal direction is equal?

• a. 281 cm

• b. 4194 mm

• c. 401 cm

• d. 2992 mm

A W-shape steel column having an effective length of 6 m has a radius of gyration of 154 mm about its x-axis and a radius of gyration of 63 mm about its y-axis. If the yield strength is 345 MPa, calculate its nominal compressive strength (kN). Use LRFD and NSCP 2015.

• a. 3374

• b. 2754

• c. 2959

• d. 2663

A W-shape steel column having an effective length of 6 m has a radius of gyration of 154 mm about its x-axis and a radius of gyration of 63 mm about its y-axis. If the yield strength is 345 MPa, calculate its nominal compressive strength (kN). Use ASD and NSCP 2015.

• a. 3374

• b. 2754

• c. 2959

• d. 2663