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Diamond Dowels

How Diamond Dowel Works

Diamond Dowel uses tapered steel plate dowels and matched sleeves at formed construction joints. The plate geometry maximizes effective bearing area and enables lateral (in-plane) movement while preventing vertical differential movement. This produces high load transfer efficiency (LTE) across the joint and minimizes joint faulting and edge damage.

 

Why Plate Dowels vs Round Dowels?

Plate ( Diamond Dowel) Round Dowels
Large effective bearing area; better LTE Smaller bearing area; higher bearing stress
Allows in-plane movement; reduces restraint Often requires sleeves/caps; misalignment can restrain movement
Fast, drill-free formwork setup Often requires drilling/form brackets
Improved performance at intersections Less tolerant at complex joint nodes
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Description

Installation Snapshot

Fix Diamond Dowel sleeves to the first-side formwork at the engineer’s specified spacing and elevation.

  • Place and finish concrete on the first side; cure as required.
  • Strip formwork; insert Diamond Dowel plates fully into the sleeves.
  • Place and finish the second-side pour, ensuring the joint is straight and sleeves remain aligned.
  • Cut contraction joints as specified; protect arises (consider armoured joints in high-traffic zones).

Technical Options

Key Advantage What it Means
Unrestricted joint movement Prevents restraint-induced cracking while maintaining slab alignment.
Superior load transfer Optimizes floor life under heavy wheel and point loads.
Fast installation No drilling in formwork; sleeves fix to forms for rapid setup.

 

Plate thickness 6 mm
Typical plate material Structural steel plate
Sleeve type High-strength polymer, nail-on flange for formwork
Joint movement Two-way horizontal movement; no vertical differential
Typical use Slabs-on-ground, hardstands, high-bay warehouses, logistics hubs
Finish compatibility Compatible with armoured joints; suitable under hard-wheeled traffic