Keystone Compac® Hewnstone
A Specifier’s Favourite

Keystone Compac Hewnstone 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® Hewnstone 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
4 x 18 x 14 in
101.6 x 457.2 x 355.5 mm

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

Fiberglass Alignment Pins
0.5 x 5.25 in
13 x 133 mm

Colours

Charcoal

Sierra Grey

Graphite

Natural

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

Description	Dimensions	Unit Size MM	Unit Size IN	Unit Face Area M2	Unit Face Area Sq Ft	Unit Weight LB	No. Of Horizontal Layers	Pallet Units	Pallet Face Area M2	Pallet Face Area Sq Ft	Pallet Weight LB	Pallet Row Face Area M2	Pallet Row Face Area Sq Ft
Keystone Compac Hewnstone Standard	H X W X D	203 x 457 x 305	8 x 18 x 12	0.09	1	78	5	30	2.78	29.96	2336
Keystone Compac Hewnstone Corner	H X W X D	203 x 457.2 x 228.6	8 x 18 x 9			104	3	18	1.67	17.97	1872
Coping	H X W X D	101.6 x 457.2 x 355.5	4 x 18 x 14			82	6	36			2937	16.46	54
Fiberglass Alignment Pins	H X W X D	13 x 133	0.5 x 5.25			0.08		100/box			8/box

Colours	Item No. Standard	Item No. Corner	Item No. Coping	Item No. fiberglass pins
Charcoal	139848	134788	144046	123168
Sierra Grey	139849	134789	144049
Natural	142313	142312	144048
Graphite	143708	143709	144047

Applications

Retaining / Support / Freestanding Walls

Product Notes

Additional shipping fees may apply to BC-made products for customers in other provinces. Sold in full pallets only. A $35 pallet fee will be applied to all pallets of Keystone Compac with a $30 credit issued for each pallet returned in acceptable condition. Contact your local Barkman sales representative for further details. The Unit of Measure for Keystone Compac is Each. Use 2 fiberglass pins per block to connect. For near vertical batter, place pins in front hole location. For 8.5 degree batter, place pins in back hole location. For 4 degree batter, alternate pin location starting with back pin location on first course, front location on second course and alternating on consecutive layers. Alignment pins sold separately. For information on wall heights, consult the product installation guide and technical specifications. Check your local building codes and consult a professional engineer when required.

The Small Coping is set to be discontinued in 2026. We will provide updates throughout the year regarding any changes.

Resources

Keystone Compac Hewnstone – Spec Sheet

Keystone – Design Charts

Keystone Walls Construction Guide

Keystone – Construction Guide Corners & Curves

Keystone Compac Hewnstone Wall Install Guide

Keystone – Technical Information

Keystone – Specifications

Keystone – Running Bond Pattern 1

Keystone – Hatch Pattern

Keystone – Safety Data Sheet