Precast concrete wall system

A casting tool for forming a pre-cast concrete wall section comprising:

• a base having an upper surface and configured for orientation in a horizontal plane, said base including a plurality of receiving locations spaced apart along a first axis;
• one or more pan members attached at selected receiving locations on said base configured to define a remainder length along said first axis unoccupied by pan members, said one or more pan members being raised relative to said base to form corresponding cavities in said pre-cast concrete wall section;
• a pair of opposing sidewalls proximate said upper surface of said base and substantially parallel to said first axis, each of said sidewalls having a substantially vertical first position;
• first and second opposing bulkheads proximate said upper surface and substantially perpendicular to said first axis, each of said bulkheads having a substantially vertical first position arranged to abut said pair of opposing sidewalls wherein said pair of sidewalls, said first and second bulkheads and said upper surface including said pan members define a form for the pre-cast concrete wall section;
• and
• an arrangement configured to vary a height dimension of said form selected from the group comprising (i) an elongated insert having a length corresponding to said sidewall, having a predetermined width, and disposed proximate an inner surface of said sidewall to thereby reduce said height dimension;
• and (ii) one of said sidewalls being configured for movement along a second axis substantially perpendicular to said first axis.