Bow Window

By Huu Khanh Nguyen · Updated October 25, 2026 · andersen, rehau, bow

A gently curved projecting window made of several equal side-by-side units that open like casements, joined by posts. Number of units across the bow Units hinged left or right Frame profile, cill and ventilator Sash, bead and glass type Hinges, handles and glazing bars

Parameters

Name	Default	Unit
Width	3000	mm
Height	1480	mm
Frame depth	80	mm
Finish	powderRal9016
Frame face width	82	mm
Units across	4
Angle between units	10	°
Post width	96	mm
Left unit hinge side	left
Right unit hinge side	right
Glass thickness	24.4	mm
Vertical bars	1
Horizontal bars	1
Left unit opening	0	°
Right unit opening	0	°
Sash edge inset	frameWidth - 34	mm
Post setback	postWidth / (2 * Math.cos(bowAngle * Math.PI / 360))	mm
Unit width	(sizeX + 2 * postSetback * Math.cos((unitCount - 1) * (bowAngle * Math.PI / 360))) / (Math.sin(unitCount * bowAngle * Math.PI / 360) / Math.sin(bowAngle * Math.PI / 360)) - 2 * postSetback	mm