Concrete blocks

Back-up brick

Brick tie not folded

Back-up brick

Cinder block - Hollow - 4 in.

Firebrick  2 1/2 in. X 4 in. X 8 1/4 in.

Cinder block - Hollow - 8 in.

Cinder block - Full - 2 in.

Cinder block - Full - 4 in.

Firebrick low duty - 1 1/4 in x 4 1/2 in x 9 in

Cinder block - Hollow - 6 in.

Parking bumper