Shuttering system for use in building construction

Claim 1

MEANS FOR SUPPORTING SHUTTERING ELEMENTS IN THE CONSTRUCTION OF ROOFS, FLOORS AND CEILING FORMED FROM CONCRETE AND OTHER SETTABLE MATERIAL, SAID MEANS COMPRISING AN EXTENSIBLE PROP EMBODYING RELATIVELY EXTENSIBLE UPPER AND LOWER PROP MEMBERS, A SHUTTERING MEMBER SUPPORTED ON THE UPPER PROP MEMBERS AND HAVING A UPWARDLY DIRECTED CONCRETE ENGAGING FACE, A SHUTTERING ELEMENT SUPPORT MOUNTED ON THE UPPER PROP MEMBER AND SLIDABLY AXIALLY THEREOF BETWEEN A LOWER INOPERATIVE POSITION AND AN UPPER OPERATIVE POSITION FOR SUPPORTING A PLURALITY OF SHUTTERING ELEMENTS IN A POSITION FLUSH WITH THE CORRESPONDING FACE OF THE SHUTTER MEMBER SUPPORT, INTERENGAGEABLE ABUTMENT PORTIONS ON THE UPPER PROP MEMBER AND SHUTTERING ELEMENT SUPPORT RETAINING THE LATTER IN ITS OPERATIVE POSITION, ONE OF SAID ABUTMENT PORTIONS COMPRISING AN ABUTMENT FACE INCLINED TO THE HORIZONTAL, MEANS MOUNTING SAID ABUTMENT PORTIONS FOR RELATIVE TURNING MOVEMENT ABOUT THE LONGITUDINAL AXIS OF THE PROP BETWEEN AN OPERATIVE POSITION IN WHICH SAID ABUTMENT PORTIONS INTERENGAGE AND A FREE POSITION IN WHICH SAID ABUTEMENT PORTIONS ARE DISENGAGED FROM ONE ANOTHER TO PERMIT OF THE SHUTTERING ELEMENT SUPPORT BEING SLIDDEN DOWNWARDLY RELATIVE TO THE PROP AND SHUTTERING MEMBER SUPPORTED THEREON TO EFFECT LOWERING AND REMOVAL OF THE SHUTTERING ELEMENTS.