RSJ Clamp. Adjustable Lindaptors. Rotating Stud Hanger. For Hanging M12 StudSWL: 480Kg (240Kg per Lindaptor). Centre fix RSJ Clamp 75-150mm. For hanging M12 studding from a rolled steel joist. Rotating stud hanger to allow fixing to an inclined joist.. girder clamp-rsj clamp