Lally column

A Lally column is a round thin walled structural steel column oriented vertically to provide support to beams or timbers stretching over long spans. The steel shell of a Lally column is filled with concrete, which carries a share of the compression load, and helps prevent local buckling of the shell. The advantage of a Lally column over conventional structural steel is the ability to cut it to length on a construction site with simple hand tools such as a plumber’s pipe cutter or a reciprocating saw. Lally columns are generally not as strong or durable as conventional structural steel columns. The term "lally column" is sometimes incorrectly used in reference to other types of prefabricated steel columns.