The ASTM C90 standard changed from requiring 2.25 in/ft minimum equivalent web thickness to requiring 6.5 in²/ft² normalized web area in standard concrete masonry units. What followed was a 6 year design process that has resulted in a full line of patented open ended concrete masonry units branded as ProBlock.
The ProBlock masonry wall system is a wholly new concept developed for productivity, safety, energy performance and profitability.
Reduced project cost and improved scheduling
ASTM C90 Complaints
High thermal R Values without the cost premium of other masonry wall systems
Open-end Desgin allows masons to lay around vertical rebar, utility runs and reduce and avoids overhead lifting
26%+ lighter than other CMU's of the same material mix, making it easier to handle and quicker to install.
Reduce rebar splicing and the amount of steel required for the project.
Balanced center of gravity is located properly "in the center web" of the block for ease of handling.