Diamond Dowel


Diamond Dowel® System

Tapered plate dowels for formed construction joints.

Diamond Dowel Structural

The industry standard for construction joints, the Diamond Dowel® System achieves superior joint stability measurements of 0.01 in (25 mm) and delivers reliable, maintenance-free and serviceable concrete flatwork. With the proven Diamond Dowel® System you can optimize materials, reduce labor costs, improve worker safety and minimize joint spalling and random cracking.

    Recommended for formed construction joints in:

  • Concrete slabs on grade
  • Concrete pavement
  • Concrete flatwork exposed to pedestrian traffic

With the proven Diamond Dowel® System, you provide the joint stability, positive load transfer and continuity of surface profile your projects demand. The Diamond Dowel® System consists of the tapered plate dowel, sleeve and installation template. The Diamond Dowel® tapered plates are available in three sizes (depending on the loads, wheel type and repetition):

  • 1/4” (6mm) – typically used in 4”- 7” slab depths
  • 3/8” (10 mm) – typically used in 7”- 9” slab depths
  • 3/4” (20 mm) – typically used in 9” plus slab depths

The Diamond Dowel® System is optimal for formed construction. Contact JBA for size and spacing to suit your design and slab type.


The Diamond Dowel® System is engineered to guarantee the fastest and most perfectly aligned installation of load transfer at construction joints.

Diamond Dowel® installation template

  • Reduces labor costs by more than 75 percent when compared to round dowel installation
  • Included in each box of Diamond Dowel® pocket formers for job-site convenience

Diamond Dowel® bulkhead

  • Delivers consistent, even and true joint performance when used in conjunction with the Diamond Dowel® System
  • Saves set-up time with the pre-cut top chamfer
  • Optimizes fast, efficient alignment of the Diamond Dowel® pocket former using the pre-cut trench groove
  • Eliminates the need for a release agent with a bond breaker overlay
  • Reduces waste by up to ten percent compared to lumber as it is straight and true
  • Bulkheads are 1/4 inch (6 mm) shorter than full elevation of slab to accommodate allowable tolerances in the subgrade
  • Available in standard 16 foot (4.8 meter) length

Diamond Dowel® installation template

Diamond Dowel® bulkhead


  • Easy and precise installation is highly efficient.
  • Delivers joint stability for reliably performing slabs.
  • Minimizes cracking by reducing restraint.
  • Improves worker safety by reducing tripping hazards.
    Reduce Joint-Edge Spalling
  • Delivers acceptable joint stability per industry guides of less than .01 inch (.25 mm) and continuity of surface profile across the joint
  • Minimizes initial dowel looseness through the consistent and tight manufacturing tolerance in the formation of the Diamond Dowel® pocket former
  • Reduces additional dowel looseness by delivering an engineered 6.36 inches (159 mm) of steel at the joint and 5.45 square inches (136.25 mm) of steel (given a joint opening of 1/8 inch [3 mm]) in the first inch of embedment where the bearing, shear and flexural stresses are the highest
  • Permits dowel placement where the curling stresses are highest, to within six inches (150 mm) of the joint intersection
    Minimize Random Cracks and Ensure Joint Activation
  • Allows for free horizontal movement of the concrete without restraint with 45° tapered diamond plate geometry
  • Minimizes horizontal and vertical alignment deviations of the tapered plate with the Diamond Dowel® bulkhead or installation template
  • Allows for a 3/8 inch (9.4 mm) of lateral movement at a joint that opens 1/8 inch (3 mm)
    Product Performance Characteristics:
  • Diamond Dowel® 1/4” and 3/8” plates are manufactured from steel certified to meet ASTM A36, providing consistent modulus of dowel support to ensure reliable quality and performance; 3/4” plates are manufactured from Grade 1018 cold-finished steel certified to meet ASTM A108 to ensure thickness tolerances of the manufactured material reliably enables delivery of the allowable total differential deflection of .01 inches (.25 mm)
  • Diamond Dowel® pocket former is molded from high density ABS plastic with internal collapsible fins and spacers that ensure load plate is installed in correct position, maintains integrity of the pocket former and creates a vertical void to its vertical faces
  • Extracted, harvested or recovered, as well as manufactured, in the USA from recycled steel and eligible for LEED® credits