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Keystone Century Wall

The keystone century wall is designed specifically for taller wall structures and heavy loading conditions and also where the aesthetics are of major concern. The keystone century wall has got a distinctive appearance and character of a random pattern natural stone wall. Along with these the keystone century wall has also got the structural rigidness and performance of concrete and not to forget about its eco-friendliness.Its three-piece system is perfect for industrial, commercial, institutional and also for residential purpose. Its combination with three units of 4” keystone half century wall leaves a vast scope for various innovative designs.

Two types of keystone century walls are there:

  • Normal century wall
  • Half century wall (as the name itself tells that it has half the weight of a normal century wall)

Specifications of Keystone Century Wall

Keystone Century WallKeystone Half Century Wall

  Keystone Century Wall Keystone Half Century Wall
small medium large small medium large
height 8" 8" 8" 4" 4" 4"
width 7" 11" 18" 7" 11" 18"
depth 12" 12" 12" 12" 12" 12"
weight 37lbs 58lbs 92lbs 18lbs 29lbs 46lbs
pins yes yes yes yes yes yes

Product size, weight, color and product availability varies by location. P lease contact your local manufacture for up to date product information.

Installation of Keystone Century Wall

Installation is easy with the unit shape’s tail element which makes the handling easier. In general installation is done in the following six steps:

  • Prepare the base leveling pad. All the debris and surface vegetation should be removed and must not be used as backfill. The leveling pad should be prepared with six inches (150mm) of well compacted granular filling of pad base. An step up of 8 inches (200mm) should be taken for changes in elevation.pea gravel and sand should not be used for leveling of the pad.
  • Install the base course: End to end placement of first course of keystone century units should be done in a random arrangement where the front corners are touching. Each unit should be level side to side and also front to back. Embedment of base course should not be less than 1" for every course.
  • Insert the fiberglass pins: The keystone century wall units are given desired setback position by placing shouldered fiberglass pins into the appropriate holes. Pins should be placed in the rearmost holes for an 8.8 degree setback for each course. An optional pin hole is provided in larger units for ensuring that the small units do not slip between pins which are above to it.
  • Install core fill & compaction: After the installation of the pins, 1/2-inch 3/4-inch (10-20mm) crushed stone drainage fill should be provided behind the units to a minimum distance of one foot (300mm) behind the tail. Fill all open spaces between units and open cavities/cores with the same drainage material. Backfill soil should be placed in maximum eight inch (200mm) layers and compact to 95% Standard Proctor with compaction equipment appropriate for the job. Heavy (rideon) compaction equipment within three feet (1m) of back of wall should not be run and also use of pea gravel or sand for drainage fill should be avoided.
  • Install additional courses: The next course of keystone century wall units should be placed over the fiberglass pins which fit to the long receiving channel recess in the other units above to it. Stack bonding should be avoided while placing units randomly.
  • Capping the wall: The top of the wall should be clean and thus should be prepared for the application of the constructional adhesive for bonding purpose. The keystone century capping unit should be placed which may be flush or overhanging according to the needs.

Hire a Keystone Century Wall Contractor Now

We provide contractors on demand for specific keystone unit’s installation to multiple types. The estimated retaining wall structure work is done at reasonable and affordable prices by our contractors.

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