Subject: Design and Drawing of Steel Structure

Topic: Compression Member

Difficulty: High

Design a built column composed of two channel sections placed back to back, carrying an axial factored load of 1600 KN. Effective length of column is 5.2 m. Design battened system. Draw neat sketches to show details. Use 4.6 grade 20mm dia. bolts for the connections.

Given

Fractured load = 1600 kN, Effective length = 5200 mm, 4.6 grade 20 mm diameter bolts.

To know: Design batten system, using two channels placing back to back.

For double channels slenderness ratio to be assumed between 40-80.

Therefore, assume allowable compression stress = 190 N/mm$^2$

C\S area required …