Our standard architectural window head designs – R1, plain-ended or tapered; R2, plain-ended with integral keystone; and R3 window head, tapered with integral keystone – suit a three-brick course height in a normal cavity-wall situation. The window heads are available to suit the following British Standard brick openings:
|R1, R2, R3|
|460mm (18 1⁄8”)||910mm (35 13⁄16”)||1248mm (49 1⁄8”)||1585mm (62 3⁄8”)*|
|685mm (26 15⁄16”)||1135mm (44 11⁄16”)||1360mm (53 9⁄16”)||1810mm (71 1⁄4”)*|
*Only supplied as a two-piece window head, left-hand end of R2 and R3 incorporating keystone.
Custom made cast stone window head designs can be made to order.
Please note that other head sizes can be manufactured to order.
Supporting lintels must be used as these window heads are not structural members.
We strongly recommend that you refer to Eurocode 6 and PD 6697: 2010.