Mechanical Behaviour of Four-Leg Base Configuration on Cold-Formed Steel Lattice Column

Steel lattice structure has often been used as column or girder, which is connected to each other by bolting, screwing or welding. Steel lattice is normally made using hot-rolled steel (HRS) and rarely used cold-formed steel (CFS). CFS is becoming popular in the building and construction sector due to less maintenance cost and ease of fabrication. The stability of the steel lattice structure either by using HRS or CFS is necessary to be studied and investigated, which is by checking their mechanical behaviour for the overall structure and focusing on the base configuration. The CFS lattice structure, member section, configuration, connection or fastener, end support and span must be checked to determine the mechanical behaviour. However, the failure of CFS, such as buckling, must be revised to ensure that the CFS lattice column is stable. The effect of CFS lattice structure mainly fails or become unstable due to the slender section of the structure, especially on the compression member. The slender section of the structure must be intentionally replaced with a short section or get added by bracing. There are four types of four-leg base configuration that have been tested. From the testing, the B.CFS 4 specimen showed the highest value of ultimate load among the specimens.