Joint Stability For New and New-To-Exisiting Concrete Flatwork
PNA Square Dowels and Square Dowel Clips™ improve joint stability for reliable construction joints in new and new-to-existing concrete flatwork applications. The dowels are sawn full-depth and deburred per industry guidlines ensuring square and smooth edges that will not induce restraint.The Square Dowel Clip features compressible foam that keeps the Square Dowel in place during construction while also allowing for joint activation and free movement of the concrete after placement without creating restraint. When using this system in new concrete, our Square Dowel Aligners can be used to secure the dowels to wood formwork.
The Clear Choice Over Round Dowels
- Ensures a consistent amount of steel at the joint where the bearing, shear, and flexural stresses are highest
- Delivers load transfer using an increased bearing area of steel at the joints
- Permits dowel placement to within 6 inches of the joint intersection, where curling stresses are highest
- Eliminate greasing/spinning dowels and removing and reinstalling dowels
Dowel size (thickness) recommendations are equivalent for round and square dowels; for example, if a 1" round dowel bar was specified for a project, then a 1" square dowel is recommended. The table below, based on ACI 2010 and ACI 2017, provides recommendations for square dowel size, length, and Square Dowel Clip™ length. The Square Dowel Clip™ length is sized such that any dowel that is installed within the specified tolerance will always have a clip length greater than the exposed half of an installed dowel.
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