Details of a steel window

A steel window uses rolled steel sections (Z, T or L, about 20 x 20 x 3 mm), welded to form the frame and sashes. The sash may be fixed or openable (side-hung or top-hung).

 ELEVATION                       SECTION AT JAMB
 +------+-------+                  wall |  frame (Z 20x20x3)
 |      |       |                       | +--+
 |  F   |  O    |  F = fixed            | |  |= glass (3 mm)
 +------+-------+  O = openable         | +--+  putty
 |      |       |                       |  lug fixed in
 |  F   |  O    |                       |  wall 100 mm
 +------+-------+

Details: 3 mm glass panes are fixed in the rebates of the sections with steel glazing clips and putty; frames are fixed to the wall by 100 mm long lugs (holdfasts) embedded in 1:3 mortar, placed about 300 mm from the top and bottom and not more than 450 mm apart; handles and friction hinges are provided for the openable sash; painted with red lead primer and enamel; typical size 1.2 m x 1.2 m.