Precast fireplace, methods of manufacture and erection

Claim 1

A PRECAST CHIMNEY STRUCTURE INCLUDING A FIREPLACE STRUCTURE AND STACK, SAID CHIMNEY STRUCTURE COMPRISING: A SEPARATELY CAST THIN WALLED FIREBOX MADE OF REFRACTORY MATERIAL HAVING AN OVERHEAD STACK OPENING AND A VERTICAL HEARTH OPENING; A CONCRETE ENCASEMENT HAVING RELATIVELY THICK WALLS ABOUT SAID THIN WALLED FIREBOX FORMING A FIREPLACE AND SUBSTANTIALLY ENCLOSING SAID FIREBOX EXCEPTING THE OPENINGS THERETO AND INTEGRAL THEREWITH A CONCRETE STACK HAVING A FLUE OPENING INTO THE STACK OPENING OF THE FIREBOX; AND SAID CHIMNEY STRUCTURE BEING FURTHER CHARACTERIZED BY LONGITUDINALLY EXTENDING STEEL RODS EMBEDDED IN THE FIREPLACE END OF THE STRUCTURE AND REACHING BELOW SUCH STRUCTURE TO PROVIDE EXPOSED ANCHOR RODS FOR EMBEDMENT IN A CONCRETE SUPPORTING BASE UPON ERECTION OF SAID PRECAST CHIMNEY STRUCTURE;