BS 4873 specifies requirements for the design, construction and performance of aluminium alloy windows intended to be installed vertically, including materials and glazing.
BS 4873 is applicable to the following window types, which can be in multi-light form:
a) hinged-side-hung (open in or out), top-hung (open out), bottom-hung (open in), tilt and turn;
b) projecting-side-hung (open out or reversible) and top-hung (open out or reversible);
c) pivoted-horizontal and -vertical (hung centrally or off-centre including reversible);
d) sliding-horizontal and -vertical (including tilting sash to vertical);
e) fixed lights;
f) louvred-adjustable.
It is also applicable to windows that are used for replacement purposes and those that have thermally improved frames.
BS 4873 is not applicable to:
1) windows in which any frame member is longer than 3 m;
2) fixed louvres;
3) secondary windows applied to convert existing single windows into double or coupled windows;
4) windows with frames designed to be glazed with security glazing;
5) the thermal properties of thermally improved frames.
BS 4873 supersedes BS 4873:1986, which is withdrawn.
BS 4873 includes the following cross references:
BS 952-1, BS 3987, BS 4255-1, BS 4842, BS 5713, BS 6100-1.0, BS 6100-1.5.1,
BS 6100-1.6, BS 6262, BS 6338:1982, BS 6375 (both parts), BS 6399-2, BS 6496, BS 7950:1997, BS EN 485-2:1995, BS EN 755-9:2001, BS EN 1670:1998,
BS EN 12329:2000, BS EN 22063:1994, BS EN ISO 1461, BS EN ISO 3506-1:1998, BS EN ISO 3506-2:1998, BS ISO 11600.