Keystone Compac III
A Specifier’s Favourite

Keystone Compac III combines style, performance and cost-saving versatility into one wall system. It’s favoured by architects, engineers and contractors worldwide for its function in both small and large-scale projects. Using the proven Keystone pin connection system, Keystone Compac® III is the perfect solution for gravity walls up to 4 feet in height and large-scale projects over 60’h. Corner and coping units are also available.

Maximum Versatility and Performance Due to:

  • A design that results in decreased unit weight, effectively reducing shipping costs while maintaining structural integrity.
  • A design that allows for various positive connections with reinforcement to build engineered walls over 60 feet (18.2m) tall. 
  • Increased vertical drainage through face units. 

Easier Installation Due to:

  • A block shape that allows for tight radius curves and vertical core alignment.
  • A shorter tail design that allows for easier handling in the field.
  • A triangular shaped pin receiving hole that allows for installer-friendly construction adjustments.
  • Vertical or battered setback construction options.

Sizes (H X W X D)

Standard
8 x 18 x 12 in
203 x 457 x 305 mm

Coping
3.94 x 17.71 x 11.81 in
100 x 450 x 300 mm

Corner
8 x 18 x 9 in
203 x 457.2 x 228.6 mm

Fiberglass Alignment Pins
.5 x 5.25 in
13 x 133 mm

Colours

Charcoal

Ash

Sierra Grey

COLOURS SHOWN MAY VARY
Every effort has been made to ensure accuracy in the colour representations found on this website. However, due to the natural characteristics of concrete, the manufacturing process and on-screen display, actual colours in the final product may vary from that shown.

Specifications

DescriptionUnit Size MMUnit Size INDimensionsUnit Face Area M2Unit Face Area Sq FtUnit WeightPallet Row UnitsPallet Row Face Area M2Pallet Row Face Area Sq FtPallet UnitsPallet RowsPallet Face Area M2Pallet Face Area Sq FtPallet Weight
Keystone Compac III Hewnstone Standard 203 x 457 x 305 8 x 18 x 12 H X W X D 0.09 73 24 2.22 24 1752 
Keystone Compac III Hewnstone Corner 203 x 457.2x 228.6 8 x 18 x 9 H X W X D 104 18  1872 
Coping 100x 450 x 300 3.94 x 17.71 x 11.81 H X W X D 0.045 0.4845 66 12 10.97 36 lin. ft 48 21.95 72 lin. ft 3168 
Fiberglass Alignment Pins 13 x 133 .5 x 5.25 H X W X D 0.08 100/box 7.9/box 
ColoursItem No. StandardItem No. CopingItem No. CornerItem No. fiberglass pins
Ash 139847 134787 134798  
Charcoal 139848 134788 134799  
Sierra Grey 139849 134789 136462  
    123168 

Applications

Retaining / Support / Freestanding Walls Application Icon

Retaining / Support / Freestanding Walls

Product Notes

Sold in full pallets only. A $25.00 returnable pallet fee will be charged to any bundle of Keystone Compac III – Hewnstone. Use 2 fibreglass pins per block to connect. For near vertical batter, place pins in front hole location. For 8.5 degree batter, place pins in the back hole location. For 4 degree batter, alternate pin location starting with back pin location on the first course, front location on the second course and alternating on consecutive layers. Alignment pins sold separately.