Casement windows are often held open using a casement stay. The sliding mechanism makes sash windows more vulnerable to these problems than traditional casement windows. French doors are derived from an original French design called the casement door. It is also used in door and casement window jambs, and for shiplap planking. Formerly, plain hinges were used with a casement stay. The tripartite consisted of a central light flanked by two four-light casement windows. Casement windows are labelled in one of two ways. Variants of casement windows are still the norm in many European countries. The Air Corps' principal base of operations is out of Casement Aerodrome in Dublin. But Scott also investigated the wartime traitor Sir Roger Casement. The abuses against indigenous were chronicled by the British consul, Sir Roger Casement. Durant hired Dodge as chief engineer and Jack Casement as construction boss. In late 1914, Zimmermann was visited by Roger Casement, the Irish revolutionary. John had a brother, Daniel T Casement. John Frank (1866-1886) and Dan Dillon Casement (1868-1953) .