Method of manufacturing bracing

Claim 1

A METHOD OF FORMING A PAIR OF SEPARABLY CONNECTED COOPERATING BRACING MEMBERS COMPRISING FORMING A PAIR OF TRANSVERSE DIAMETRICALLY OPPOSED SLOTS OF SUBSTANTIALLY EQUAL SIZE IN AN ELONGATE FLAT STRIP OF METAL INTERMEDIATE THE ENDS THEREOF, SAID SLOTS EXTENDING INWARDLY FROM THE SIDES OF SAID STRIP DIVIDING THE STRIP INTO FIRST AND SECOND END PORTIONS AND DEFINING THEREBETWEEN A NARROW ELONGATE TONGUE WHICH CONNECTS SAID END PORTIONS TOGETHER, TRANSVERSELY WEAKENING THE STRIP ALONG THE LINE OF JUNCTURE BETWEEN SAID TONGUE AND FIRST END PORTION WHEREBY THE JOINT THEREBETWEEN CAN BE SERVED BY RELATIVE PIVOTAL MOVEMENT BETWEEN SAID END PORTIONS ABOUT SAID WEAKENED JOINT, FORMING AN OPENING IN SAID FIRST END PORTION SUBSTANTIALLY MIDWAY BETWEEN THE SIDES THEREOF CAPABLE OF RECEIVING SAID TONGUE, AND SHAPING SAID FIRST AND SECOND END PORTIONS INTO FIRST AND SECOND CHANNEL MEMBERS RESPECTIVELY, SAID SECOND CHANNEL MEMBER BEING FORMED TO A NARROWER WIDTH THAN SAID FIRST CHANNEL MEMBER WHEREBY SAID SECOND MEMBER CAN BE TELESCOPICALLY SEATED IN SAID FIRST MEMBER WITH SAID TONGUE INSTALLED IN SAID OPENING.