METAL SCAFFOLDING CONSISTING OF METAL TUBES, CLAMPS FOR UNITING THE TUBES, FOOT PLATES FOR THE SCAFFOLDING, ADJUSTING DEVICES FOR THE SCAFFOLDING, AND PRE-FORMED SCAFFOLDING FRAMES, METAL SHUTTERING IN THE NATURE OF FORMS DESIGNED FOR USE DURING THE CONSTRUCTION OF BUILDINGS AND THE LIKE, BUT NOT FOR PERMANENT ATTACHMENT THERETO, AND PARTS OF AND FITTINGS FOR ALL OF THE GOODS MENTIONED ABOVE