Awning Window Height From Floor

Refer to the drawing.

Awning window height from floor.

The 2018 irc continues to require the bottom of openings created by operable windows to be a minimum height of 24 inches above the adjacent interior floor when they are more than 6 feet above the grade outside the window. An exception from this requirement also remains in the 2018 irc for windows that do not open more than 4 inches or that are. Any windows in a door must have tempered glass no matter the height unless it is too small for a 3 inch ball to pass through the window. Similarly many windows can be set lower than the common height of 3 feet above the floor.

The bottom height or sill of the window can vary within a room without affecting its visual appeal but the head heights must be uniform especially in the corners. For example a window that measures 60 in height would have an awning that has a 30 projection. You can choose either projection this will change the height of the awning and how far it projects out from the wall. A standard projection b would be approximately half the height of your window.

Minimum width of opening. But if nothing is in front of the window lowering the sill will increase ventilation the more operable glass the greater the air flow and allow you to bring in. Minimum net clear opening. Traditionally that height was meant to allow the placement of furniture under the sill.

The short answer is awning windows can be used for egress but there is a longer answer. Minimum height of opening. If you are installing windows within 2 feet of a door and lower than 5 feet from the ground you need tempered glass in the windows even though these might be higher than 18 inches from the ground.