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Dowel bars

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Dowel bars are a steel load transferring device typically used in jointed plain concrete pavement (JPCP). The objective of the dowel bars is to transfer the load from one slab to the next such that two consecutive slabs move together and thus reduce any impact loading from faulting caused by the slabs moving independently. The size of the dowel bars depends on the thickness of the pavement, but typically sizes are 18 in (45.7 cm) long with diameters of 1.25 in (3.2 cm) to 1.5 in (3.8 cm). Typically dowel bars are placed 12 in (30.5) apart starting at 6 in (15.2 cm) from the pavement edge. However, recently it has become more common to only place dowels in the wheel paths to help cut down costs. The dowel bars are typically placed at mid-slab.