Design for steel door especially fire retarding door has the fixed steel frame with gap to accommodate the door hinges

摘要

A design for a steel door, e.g. a fire retarding door, has a fixed steel frame (9) around three sides of the door opening and shaped to accommodate a steel frames door (1). The fixed frame has a gap to accommodate the hinge sections (17.1, 17.2) attached to the door and with the other hinge sections (16) fitted inside the fixed frame. The outer profile of the fixed frame has a recess to take the lipped outer edges (5) of the door to form a flush fitting. The hinges are stepped to link to outer hinge swivels (15).