CRESTONE STRAIGHT ® Crestone® Straight blocks are perfect for shorter retaining walls and walls with tight curves. The straight blocks create a perfectly flush face to accent your home. The rear alignment lip helps to set blocks for a perfect wall. Shown in Quarry Gray DIMENSIONS: 8"W BLOCK SQUARE FOOTAGE: 0.
RETAINING WALL INSTALLATION BEFORE INSTALLATION BEGINS 1. Confirm lot lines, wall location, wall length, set back requirements and elevations. 2. Confirm the on-site soils. For walls built in clay or poor soils, consult an engineer to confirm the wall design and the required soil reinforcement. See Midwest Manufacturing Engineering for more details. 3. Call the local utility companies to confirm the location of underground utilities. 4.
BASIC INSTALLATION - GRAVITY WALLS Segmental Retaining Walls that rely on their own weight, core fill, friction between units and setback are called gravity walls. Conventional segmental retaining walls are generally effective as gravity structures for most non-critical wall applications. Don’t assume shorter walls never require the services of a soils engineer. The heights listed by the manufacturer are used as a rule of thumb when ideal wall conditions are present.
Step 2 - Leveling Pad Installation Place a minimum of 6" of compacted base material and compact to 95% Standard Proctor density. Verify that the base is level with a transit or hand level. Be aware that the base material (commonly referred to as road base or base aggregate) will vary from region to region. The base material should consist of crushed material: ¾" crushed concrete with fines or ¾" crushed rock or limestone with fines. Your material must be angular, nothing round.
Step 5 - Successive Course Installation Before adding successive courses, each block needs to be clean and free of foreign material. Center the block and pull it forward until the rear lip abuts the two blocks below it. Place core and drainage fill as in Step 4. Place the backfill material behind the drainage rock in maximum 3" to 6" lifts based on the rating of your compaction equipment and compact to 95% Standard Proctor Density. Repeat this process for each successive course.
Step 6.3 - Stepping a Wall/Another Option Another option for walls that step-up is to cut to fit a 6" wide section of a Step/Cap for the Denver or an 8" wide section of a Step/Cap for the Clifton and lay the Step/Cap vertically to finish the end. To ensure the vertical cap maintains a straight line from the face to the back of the block, a 2" chip is installed near the back of the block (see illustration below).
SPECIAL APPLICATIONS AND WALL DETAILS Convex/Outside Curves and Concave/Inside Curves & Corners Step 1 - Base Course Preparation for a Convex Curve Place the blocks on the leveling pad so there are no gaps between them. Consider using PVC Flex Pipes to create smooth and accurate curves. When possible, start building a curve from the center and work left and right through the curve.
RADIUS OF CONVEX CURVES ON SUCCESSIVE COURSES Top Course Radius Center Stake Base Course Radius Convex Curve Chart 1 2 3 4 5 6 7 Block Rows Radius (Min.) 1 24½" 2 263/32" 3 2711/16" 4 299/32" 5 2929/32" 6 32½" 7 343/32" 8 3511/16" 8 CONCAVE/INSIDE CURVE Step 1 - Base Course Preparation for a Concave Curve Place the blocks on the leveling pad so there are no gaps between them. Consider using PVC Flex Pipes to create smooth and accurate curves.
Step 2 - Successive Course Installation for a Concave Curve Build each course of units by starting at the same place and the same bond as the last course. Keep in mind, for Concave Curves, the taller the wall the smaller the first course needs to be. The radius of each additional course will be slightly larger than the lower course.
