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Danley Construction Products has launched a dowel system for shear load transfer between slabs on the ground that is truly revolutionary in concept and startling in it's potential for saving, performance and installation ease.
The Danley Diamond Dowel System for construction joints comprises a plastic base and triangular pocket former and a square steel plate dowel. The base simply screws or nails to the form (No drilling is required).
The pocket former (Diamond Dowel Sleeve) mounts to the base  (Diamond Dowel Base) and is cast into the first slab. After the form and re-useable base are removed then the square steel plate dowel (Diamond Dowel Plate) simple slides into the open end of the sleeve.
The Diamond Dowel Sleeve is manufactured to tight tolerance from a plastic material that will not compress significantly under vertical load. It has internal collapsible fins that hold the Diamond Dowel Plate in the correct position and creates a void on its vertical faces. This void (in addition to its shape) allows for differential shrinkage and prevents any stress accumulation in the slabs adjacent to the Diamond Dowel Plate.
The Diamond Dowel Plate optimises the steel through the joint by both changing the shape and increasing the bearing surface. Therefor the Diamond Dowel System provides improved load transfer at a lower cost.
Danley Diamond Dowel Plates are also available in hot-dip galvanised finishes.
For more information on the latest Research & Development in to Diamond Dowel, click here
| DANLEY DIAMOND DOWEL SPACING (mm) FOR SLABS ON GRADE |
| Dowel Type |
Slab Thickness (mm)
|
|
120
|
150
|
175
|
200
|
225
|
| Diamond 6mm |
600
|
600
|
500
|
450
|
350
|
| Diamond 10mm |
600
|
600
|
600
|
600
|
450
|
 The Diamond Dowel was used at Brisbane's $80m South Bank Parklands Grand Arbour. The feature is a serpentine, flower-covered footpath of varying width. "With it's alignment and width constantly changing, and with numerous posts and garden beds, the Grand Arbour pose some serious pavement design problems," explains Connell Wagner infrastructure engineer, Robert Blumson. He further explained that "We found that Danley's Diamond Dowel accommodates sideways movement between slabs to minimise transverse stress, caused by complex movements within and between the slabs."
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