Bolt-A-Blok is a unitized, post-tensioned, concrete and steel structural system, comprised of concrete blocks, steel bolts and bars. The steel components, the post-tensioning of each block and the interlocking block characteristics give the Bolt-A-Blok System its strength This evolutionary system combines the best characteristics of concrete with the best characteristics of steel.
Ordinary blocks are generally manufactured to a strength of 1,700 – 2,000 psi, yet block structures are limited in strength due to the “weak link” of mortar, typically 1,000 psi. By replacing the “glue” that bonds blocks together with steel bolts and bars, and by investing in a stronger concrete material, Bolt-A-Blok provides structural integrity that far surpasses traditional block walls. Bolt-A-Blok Systems compare favorably with much more expensive construction materials such as pre-cast concrete walls. The steel bolts and bars connect the blocks to each other at the component level. Not only does the steel replace the mortar, but the tensioning of the bolts on the bars creates unbonded, unitized post-tensioning. Post-tensioning reduces the natural weakness of concrete in tension and, therefore, increases the strength of each concrete block individually. Bolt-A-Blok block dimensions have been designed to allow for the space once filled by mortar. With this dimension change, the width of the block is half its length, therefore enabling Bolt-A-Blok blocks to cube and interlock. The interlocking of the block increases the strength of the overall system. And because blocks can cube, possible interlocking configurations are endless.
Because Bolt-A-Blok needs no mortar, water or curing, it can be quickly assembled in any weather, allows for tighter project scheduling and offers overall project cost savings. This evolutionary change delivers a solution which will revolutionize concrete construction.