Divide the wall length by the block length for each course, then multiply by the number of courses. Add half blocks for ends.
Precast Blocks & Barriers.
A quick reference for our precast blocks and barriers. Use it to plan quantities, equipment and placement before you order.
At a glance:
~2,000 kg : Full lock block
1,500 × 750 × 750mm : Full lock block size
Level base : Required for all blocks
Planning Your Wall.
Lock blocks stack in a running bond, with each course offset by half a block. Start on a level, compacted base. Walls over 1.2 m, or walls retaining soil or supporting a load, typically need an engineer. Check local requirements before you build.
Handling and Delivery.
Blocks are cast with lifting points. Use equipment rated for the weight, with a suitable lifting attachment. Clear access for the delivery truck and plan where each block will be set down.
Product Reference:
All dimensions and weights are approximate.
Full lock block: 1,500 × 750 × 750 mm · approx. 2,000 kg. Interlocking retaining and bin walls.
Half lock block: 750 × 750 × 750 mm · approx. 1,000 kg. Ends and staggered courses.
Top / cap block: Flat-top block for finishing a wall course.
Transition / corner block: For changes in wall height and direction.
Road barrier: Approx. 3 m long, 810 mm high. Traffic separation and work zones.
Parking curb: Approx. 1.8 m long. Wheel stops for lots and yards.
Frequently Asked Questions
Walls retaining soil need drainage behind them, usually drain rock and a perforated pipe, to relieve water pressure.
Can blocks be used for material storage bins?
Yes. Lock blocks are commonly used for aggregate, salt and mulch bins.
Are barriers suitable for highway use?
[DOLANS CONFIRM whether barriers meet highway specifications]
[DOLANS CONFIRM: downloadable PDF of this sheet]
Disclaimer: These guides are general information. Always follow your engineer's specification and local building requirements.
Other Resources
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