How It Works
Bolt-A-Blok concrete blocks stack with interlocking bars and bolts to create stronger structures faster — no mortar required.
Revolutionary, Yet Simple
Rectangular steel bars run horizontally through concrete blocks, and steel bolts thread vertically through the bars and blocks to create a reinforced steel grid inside the masonry structure.
The Bolt-A-Blok system is:
Strong
- Post-tensioned
- Stronger than non-reinforced mortar construction
- Equivalent to grouted and reinforced concrete masonry units with #5 rebar, 4′ on center
- Tested to 4000+ PSI max
Fast
- No cure time required
- No lateral support required
- No weather delays
- Rapid build time
- Immediate structural integrity
- Easy plumb and level alignment
- Can be pre-assembled
Affordable
- No water required
- No power required
- Reduces risk of lime runoff
- Reduces environmental impact
- Reusable components
- Repositionable
Sustainable
- Reduces construction time
- Reduces labor cost
- Reduces materials and equipment cost
- Reduces clean-up
- No mortar required
- No vibrators required
- Works with crushed stone foundation
![Placing block](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-Process1-min.jpg)
![](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-1-min.jpg)
Place the Block
Place the concrete block. Square it up with the blocks below and next to it.
![Place the bar](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-Process2-min.jpg)
![](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-2-min.jpg)
Place the Bar
Place the bar in the bar groove. Pre-drilled holes align so there is one threaded hole and one pass-through hole in every other block core.
![Place the bolt](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-Process4-min.jpg)
![](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-3-min.jpg)
Place the Bolt
Place the bolt in the pass-through hole on the top bar and the threaded hole on the lower bar.
![Tighten the bolt](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-Process3-min.jpg)
![](https://boltablok.wpengine.com/wp-content/uploads/2022/02/Bolt-A-Blok-4-min.jpg)
Tighten the Bolt
Tighten the bolt to 9-13 ft/lbs of torque using a cordless drill. Check the wall system with a torque wrench periodically.
See How Bolt-A-Blok Works
Explore the Bolt-A-Blok system with a miniature 3D model kit.
Request a Bolt-A-Block 3D Kit
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