Building Brick: Cored structural bricks, the ones with holes, are for construction. The holes are there to save material and reduce weight.

What are cored bricks used for?

Building Brick: Cored structural bricks, the ones with holes, are for construction. The holes are there to save material and reduce weight.

Why do some bricks have holes and others don t?

The holes make the bricks weigh less. … The brick is turned during construction (you won’t see the holes on the finished product) allowing mortar to fall inside. These holes, filled with mortar provide a “keyway,” locking one brick to the next. The holes can also accommodate rebar if needed.