Lift-slab construction
Definition
A method in which floor slabs are cast at ground level and hydraulically jacked up steel columns to their final position. The method was used at L'Ambiance Plaza and is associated with punching-shear hazard during the lifting sequence.
Related terms
- Carbonation depth
- The depth to which CO2 has penetrated concrete and neutralised its alkalinity, destroying the protective environment around embedded steel and initiating corrosion....
- Column tributary area
- The floor area whose load is carried by a given column. Adding floors or placing heavy equipment increases the load on existing...
- Disproportionate collapse
- Collapse extent that is far greater than would be expected from the triggering event. Ronan Point is the canonical example: a small...
- Post-tensioned slab
- A concrete slab in which steel tendons running through plastic ducts are tensioned after the concrete hardens, improving span capacity. Corrosion of...
- Punching shear
- A failure mode in which a concentrated load punches through a concrete slab around its bearing perimeter. It can occur at a...
Explained in
- Case Studies: Building CollapsesA method in which floor slabs are cast at ground level and hydraulically jacked up steel columns to their final position. The method was used at L'Ambiance Pla...