Adjustable steel columns, also known as screw jacks and beam jacks, are hollow steel posts designed to provide structural support. An attached threaded adjustment mechanism is used to adjust the height of the post.
A few facts about adjustable steel columns:
- They are usually found in basements.
- In some parts of North America, adjustable steel columns are called lally columns, although this term sometimes applies to columns that are concrete-filled and non-adjustable.
- They can be manufactured as multi-part assembles, sometimes called telescopic steel columns, or as single-piece columns.