Abstract: A fitment for a prop, comprising a head plate, which is connected to the prop body of a standard builder's prop, or to a base plate which is intended for connection to a head plate of a standard prop, by a shank, the shank carrying a support tube and a shuttering element support member, the support tube being rotatable around the shank and the support tube or shank being provided with a screw thread engaging with a correspondingly screwed nut secured to, or forming part of, the shank or support tube respectively, the arrangement being such that rotation of the support tube around the shank raises or lowers the support tube relative to the head plate, the shuttering element support being positioned between the head plate and the support tube, the arrangement being such that the shuttering element support is supported by the support tube in one angular position of the support tube relative to the shank and, in a second angular or "strip" position thereof, being free to slide over the support tube.