Telescoping Extension Legs
Adjustable vertical telescoping extension legs are an integral part of the trusses; they are used to support the aluminum trusses and
to transfer the load vertically to the ground or to subsequent floors that have been already cast. Telescoping extension legs are made of square or circular hollow steel sections braced together by tabular steel struts (Figure 4.4). These legs can be adjusted up and down to achieve the exact level of the formwork. Extension legs are typically rested on wooden planks that distribute the loads to a larger area and also prevent the extension legs from sliding, particularly in the winter season.
For stripping, after the concrete has gained enough strength, the system can be lowered away from the slab by turning down the jacks. The truss mounted forms are then moved by crane from one casting position to the next.