What Is a Lally Column?
A lally column is a steel column used to temporarily or permanently support anunsupported joistor beam.
Temporary Lally Columns
Lally columns can be temporary or permanent.
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The scope of your project and structural needs will determine which one is necessary.
When in doubt, consult a structural engineer for guidance on choosing a temporary or permanent column.
Brace the joists of floors with temporary columns when removing a load-bearing wall.
The temporary lally column can be removed once the framing is appropriately strengthened to compensate for the modifications.
Adjustable columns typically range from about 3 feet to 14 feet tall.
The shorter the column, the greater the weight it will support.
Increasing the length of the column can drop its weight rating to 10,200 pounds.
Tip
Exposed columns can be painted.
Many lally columns come primed and ready for painting.
When purchasing columns, use the steps below to choose the proper length.
double-check the column is strong enough to support the load even when fully extended.
Safety Considerations
Lally columns can become dangerous when installed improperly.
Measure the Space and Choose a Column
Measure the vertical distance to be spanned by the column.
Consult the column manufacturer’s instructions for placement direction.
Tighten the Lally Column
Turn the screw until the lally column becomes tight against the floor.
The goal is to snug the column into place but not to jack up the beam.
Check for Plumb
Use a level to ensure the lally column is perfectly plumb.
Adjust it if necessary.
Fasten the Bottom Plate to the Floor
Fasten the bottom metal plate to the floor.
Keep the lever on hand, though, in case future adjustments are necessary.
For instance, a foundation or footing could slightly settle, requiring an extended lally column.
When extending an already-installed lally column, be careful not to over-tighten it.
Doing so can damage the home, such as cracking tiles and materials, and posing safety risks.