Curling at floor joints is a common problem. However, field observations and experimental studies have shown that substantial reductions in curling can be achieved by using proprietary square steel dowels fitted with a clip-on device that puts the sides of the dowel in contact with a compressible material.
Dowels serve an important purpose in many floor slabs and pavements. They prevent faulting and subsequent cracking at joints by transferring wheel loads from one slab to the next. Unfortunately, dowels sometimes prevent joints from opening. This defeats the purpose of jointing and can cause slabs to crack between joints.