Dual purpose interlocking beam connectors

Claim 1

A PAIR OF BEAMS IN INTERLOCKED END-TO-END RELATION, SAID BEAMS EACH HAVING A PLANAR WEB PORTION, AND AT CONFRONTING EXTREMITIES HAVING DUAL PURPOSE INTERLOCKING CONNECTING MEANS INCLUDING: (A) IN ONE OF SAID PAIR OF BEAMS, (1) A TONGUE PORTION DEFINED BY SPACED PARALLEL MARGINAL EDGES EXTENDING BEYOND THE EXTREMITY OF SAID WEB AND INTEGRA THEREWITH, AND LYING SUBSTANTIALLY IN A PLANE SUPERIOR TO, AND PARALLEL TO THE PLANE OF SAID WEB, (2) A TONGUE RECEIVING POCKET FORMED IN SAID WEB ADJACENT THE PROXIMAL EXTREMITY OF SAID TONGUE PORTION, AND LYING SUBSTANTIALLY IN A PLANE INFERIOR TO, AND PARALLEL TO THE PLANE OF SAID WEB, (I) A CAM PORTION OF SAID POCKET STRUCK OUT OF THE PLANE OF SAID POCKET IN A DIRECTION INFERIOR TO THE PLANE OF SAID POCKET, AND DEFINING A TONGUE DEFLECTING AND GUIDING CAM ADAPTED TO DEFLECT THE DISTAL EXTREMITY OF A MATING TONGUE PORTION, AND GUIDE IT THROUGH SAID WEB PORTION, (II) A TAB PASSING RELIEF IN SAID CAM ADAPTED TO ALLOW SAID DISTAL TONGUE PORTION OF SAID MATING TONGUE PORTION TO SLIDE INTO SAID POCKET, SAID PASSING RELIEF LYING SUBSTANTIALLY IN A PLANE INFERIOR TO, AND PARALLEL TO THE PLANE OF SAID TONGUE RECEIVING POCKET, (3) A FIRST DETENT RECESS, ADJACENT THE DISTAL EXTREMITY OF SAID TONGUE PORTION, STRUCK OUT OF THE PLANE OF SAID TONGUE PORTION IN A DIRECTION SUPERIOR TO THE PLANE OF SAID TONGUE PORTION, AND FORMING A FIRST TAB EXTENDING IN A DIRECTION SUPERIOR TO THE PLANE OF SAID TONGUE PORTION, (4) A SECOND DETENT RECESS, ADJACENT THE PROXIMAL EXTREMITY OF SAID TONGUE PORTION, SIMILARLY STRUCK OUT OF THE PLANE OF SAID TONGUE PORTION IN A DIRECTION SUPERIOR TO THE PLANE OF SAID TONGUE PORTION, AND FORMING A SECOND TAB EXTENDING IN A DIRECTION SUPERIOR TO THE PLANE OF SAID TONGUE PORTION, (5) A DETENT BETWEEN SAID RECESSES, AND IN SPACED RELATION THERETO, SAID DETENT STRUCK OUT OF THE PLANE OF SAID TONGUE PORTION IN A DIRECTION INFERIOR TO THE PLANE OF SAID TONGUE PORTION, (6) A WELT, BETWEEN SAID SECOND RECESS AND SAID DETENT, AND LYING SUBSTANTIALLY IN A PLANE SUPERIOR TO AND PARALLEL TO THE PLANE OF SAID TONGUE PORTION, (7) ROLLED REINFORCING RIBS ADJACENT EACH MARGINAL EDGE OF SAID TONGUE PORTION, EXTENDING FROM THE PROXIMAL EXTREMITY OF SAID TONGUE PORTION BEYOND SAID DETENT AND SHORT OF SAID FIRST DETENT RECESS, AND LYING SUBSTANTIALLY IN A PLANE SUPERIOR TO AND PARALLEL TO THE PLANE OF SAID TONGUE PORTION, (B) IN THE SECOND OF SAID PAIR OF BEAMS, (1) A TONGUE PORTION DEFINED BY SPACED PARALLEL MARGINAL EDGES EXTENDING BEYOND THE EXTREMITY OF SAID WEB AND INTEGRAL THEREWITH AND LYING SUBSTANTIALLY IN A PLANE INFERIOR TO AND PARALLEL TO THE PLANE OF SAID WEB, (2) A TONGUE RECEIVING POCKET FORMED IN SAID WEB ADJACENT THE PROXIMAL EXTREMITY OF SAID TONGUE PORTION, AND LYING SUBSTANTIALLY IN A PLANE SUPERIOR TO THE PLANE OF SAID WEB, (I) A CAM PORTION OF SAID POCKET STRUCK OUT OF THE PLANE OF SAID POCKET IN A DIRECTION SUPERIOR TO THE PLANE OF SAID POCKET, AND DEFINING A TONGUE DEFLECTING AND GUIDING CAM ADAPTED TO DEFLECT THE DISTAL EXTREMITY OF A MATING TONGUE PORTION, AND GUIDE IT THROUGH SAID WEB PORTION, (II) A TAB PASSING RELIEF IN SAID CAM PORTION ADAPTED TO ALLOW SAID DISTAL TONGUE PORTION OF SAID MATING TONGUE PORTION TO SLIDE INTO SAID POCKET, SAID PASSING RELIEF LYING SUBSTANTIALLY IN A PLANE SUPERIOR TO, AND PARALLEL TO THE PLANE OF SAID TONGUE RECEIVING POCKET, (3) A FIRST DETENT RECESS, ADJACENT THE DISTAL EXTREMITY OF SAID TONGUE PORTION, STRUCK OUT OF THE PLANE OF SAID TONGUE PORTION IN A DIRECTION INFERIOR TO THE PLANE OF SAID TONGUE PORTION AND FORMING A FIRST TAB EXTENDING IN A DIRECTION INFERIOR TO THE PLANE OF SAID TONGUE PORTION, (4) A SECOND DETENT RECESS, ADJACENT THE PROXIMAL EXTREMITY OF SAID TONGUE PORTION, SIMILARLY STRUCK OUT OF THE PLANE OF SAID TONGUE PORTION IN A DIRECTION INTERIOR TO THE PLANE OF SAID TONGUE PORTION, AND FORMING A SECOND TAB EXTENDING IN A DIRECTION INFERIOR TO THE PLANE OF SAID TONGUE PORTION, (5) A DETENT BETWEEN SAID RECESSES AND IN SPACED RELATION THERETO, SAID DETENT STRUCK OUT OF THE PLANE OF SAID TONGUE PORTION IN A DIRECTION SUPERIOR TO THE PLANE OF SAID TONGUE PORTION, (6) A WELT, BETWEEN SAID SECOND RECESS AND SAID DETENT, AND LYING SUBSTANTIALLY IN A PLANE INFERIOR TO, AND PARALLEL TO THE PLANE OF SAID TONGUE PORTION, (7) ROLLED REINFORCING RIBS, ADJACENT EACH MARGINAL EDGE OF SAID TONGUE PORTION, EXTENDING FROM THE PROXIMAL EXTREMITY OF SAID TONGUE PORTION BEYOND SAID DETENT AND SHORT OF SAID FIRST DETENT RECESS, AND LYING SUBSTANTIALLY IN A PLANE INFERIOR TO AND PARALLEL TO THE PLANE OF SAID TONGUE PORTION.