Acro spans are widely used for slab shuttering works almost in all types of construction. It is basically a telescopic span which have inner and outer member.

Acro spans were initially designed for pre-stress concrete but due to becoming popular it is used in all types of works. It has two bolts for adjustment of level, as its being used in normal flat slab works. Those bolts need to be tight always. The adjustable span are used for supporting beam bottoms and centering sheets. They are assembled with an outer sliding & one inner sliding, in order to provide variable lengths to the span and lock in different positions.