How Much Weight Can a Cinder Block Hold? In general, load-bearing blocks must be able to withstand 2,500 to 3,000 psi (pounds per square inch) upon manufacture.Click to see full answer. People also ask, how much weight can a concrete block wall hold?1,700 poundsSecondly, can a cinder block hold up a car? The only appropriate place to jack up a car is on pavement. And in our case pavement means concrete, not softer asphalt. Concrete block is not acceptable, because it’s far too frangible. There are really only three options: ramps, old-school jack stands and, of course, a hydraulic lift. Similarly, it is asked, how strong is a cinder block wall? The compressive strength of concrete masonry units and masonry walls varies from approximately 1,000 psi (7 MPa) to 5,000 psi (34 MPa) based on the type of concrete used to manufacture the unit, stacking orientation, the type of mortar used to build the wall, and other factors.How much weight can a breeze block take?The specifications (ASTM C90) for hollow load bearing concrete masonry units require that the block has a net compressive strength of 1900 psi. Since a 8″ block is about 50% solid, it would take about 120,000 pounds to break it. The load you put on it in a building is much less because of a factor of safety.