Precast concrete beam and column joint construction

Claim 1

A BUILDING CONSTRUCTION COMPRISING, (A) A LOWER PRECAST CONCRETE COLUMN HAVING (1) AN END PLATE SECURED TO THE UPPER END AND EMBEDDED IN THE CONCRETE SO THAT ONLY THE UPPER SURFACE IS EXPOSED, (2) HOLES IN SAID END PLATE, AND (3) BOLTS EXTENDING THROUGH SAID HOLES, THE HEADS OF SAID BOLTS BEING WELDED TO THE LOWER SURFACE OF SAID END PLATE; (B) PRECAST CONCRETE BEAMS, EACH OF SAID BEAMS HAVING (1) AN END CAP SECURED TO AT LEAST ONE END, EACH OF SAID END CAPS HAVING, (A) A BASE PORTION IN CONTACT WITH THE END OF THE CORRESPONDING BEAM, (B) A PAIR OF PARALLEL LEGS EXTENDING ALONG AND EMBEDDED IN THE UPPER AND LOWER SURFACES OF THE END OF THE CORRESPONDING BEAM, (C) BOLT HOLES IN EACH OF SAID LEGS ALIGNED WITH BOLT HOLDS IN THE OPPOSITE LEG, (D) PIPES EXTENDING THROUGH THE CONCRETE BEAM CONNECTING SAID ALIGNED HOLES, (E) ADDITIONAL BOLT HOLES IN THE UPPER LEGS OF THE END CAPS, AND (F) BOLTS EXTENDING THROUGH SAID LAST MEMTIONED HOLES, THE HEAD OF SAID BOLTS BEING WELDED TO THE LOWER SURFACE OF SAID UPPER LEGS; (C) AN UPPER PRECAST CONCRETE COLUMN HAVING (1) NOTCHES FORMED IN THE LOWER END, SAID NOTCHES OPENING TO THE LOWER END AND OPPOSITE SIDES OF SAID COLUMN, AND