BS 644:2012 PDF

1   Scope This British Standard specifies requirements for the design, construction and performance of fully finished and glazed factory-assembled timber windows and external pedestrian doorsets of various types. This British Standard applies to windows and doorsets that have been treated with either opaque or non-opaque finishes or that are designed to support an externally fixed covering of another material, and that have been factory-glazed. It does not apply to windows or doorsets supplied as kits for site assembly. This British Standard does not apply to composite doorsets as defined in BS 8529:2010, but does cover doorsets that are predominantly timber-framed (stile and rail construction) with replaceable composite panels. It applies to windows and doorsets fabricated in a factory, to be installed vertically (±15°) into the external face of buildings, as single or multi-light units, or in coupled assemblies when appropriate, of the following types:

a) windows:

1. hinged: side-hung (open in or out), top-hung (open out), bottom-hung (open in), tilt and turn or turn before tilt;

2. projecting: side-hung (open in, open out or reversible) and top-hung (open out or reversible);