Abstract: The invention provides a construction block useful in the construction of coke oven combustion chamber assemblies. The construction block is a rectangularly-shaped unit comprises:(a) an upper and lower wall surface, wherein the construction block's upper wall surface comprises at least one ridge or groove running along at least a portion of the longitudinal axis of the construction block's upper wall surface, and wherein the construction block's lower wall surface comprises at least one ridge or groove running along at least a portion of the longitudinal axis of the construction block's lower wall surface,(b) a left and right side wall surface, and(c) two end wall surfaces, wherein at least one of the two end wall surfaces is offset along the longitudinal axis of said construction block's upper and lower wall surfaces to define one-half of a horizontally-oriented, L-shaped lap joint.

Abstract: A prefabricated structure and method for constructing and lifting the same is provided wherein the structure comprises: (a) a wall unit having a plurality of horizontal courses of construction material stacked one atop another and arranged such that they define at least one generally vertical passage therein which opens through the unit's bottom end; (b) lifting means, positioned on the unit's upper end, for lifting and transporting the unit; (c) generally vertically-oriented banding means, which is in contact with the passes under at least a portion of the unit's bottom end, for securing the lifting means to the unit; and (d) spacer means fitted within the opening defined in the unit's bottom end.