Page 164 - Corkjoint E-Catalogue

DSD/ESD Shear Load Connectors

Dowelled Joints Dowelled joints either require formwork to be Keyed Joints
Dowels are used to transfer shear across drilled for the dowels to pass through, or Keyed joints require complicated formwork to
construction and movement joints in concrete. concrete to be drilled for dowels to be resin create the tongue and groove. If the joint is not
They are often either cast or drilled into the fixed in one side. formed correctly, differential movement can
concrete. A single row of short thick dowels At movement joints, dowels will need to be take place. Load is transferred through the
provides reasonable shear transfer but suffers accurately aligned in both directions to ensure locally reduced section of the joint which can at
from deformation. This can lead to stress movement can actually take place, otherwise times result in cracking.
concentrations, resulting in subsequent spalling cracking is likely to occur.
of the concrete.
Plain dowels are not very effective when used
Where dowels are used across expansion and across joints wider than 10mm.
contraction joints, half the length of the bar is
debonded to allow movement to take place.

Compressible
joint filler

Dowel bar
End cap to allow
dowel movement

Debonding
sleeve

Misaligned dowels can result in cracking away from the expansion joint

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