Grade floor openings shall have a minimum net clear opening of 5 square feet 0 465 m2.
Minimum window height above floor in massachusetts.
The minimum net clear opening height shall be 24 inches 610 mm.
Above the finished grade or surface below the lowest part of the clear opening of the window shall be a minimum of 24 inches 610 mm above the finished floor of the room in which the window is located.
An exception from this requirement also remains in the 2018 irc for windows that do not open more than 4 inches or that are.
Minimum 20 inches of net clear width opening.
Maximum 44 inches to window sill measured from finished floor.
The minimum window sill height requirements are intended to reduce the number of injuries from falls by children through open windows.
R310 1 2 minimum opening height.
According to the 2018 irc all windows that are more than 6 feet above the grade outside the window must have a bottom opening a minimum of 24 inches above the room s interior floor.
The top edge of the glazing is greater than 36 inches 914 mm above the floor.
Glazing between the floor and 24 inches 610 mm shall be fixed or have openings through which a 4 inch diameter 102 mm sphere cannot pass.
Minimum 24 inches of net clear height 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.
The 24 inch sill height is typically above a small child s center of gravity reducing the likelihood of the child s toppling over the sill.
R310 1 3 minimum opening width.
So the standard height of the door from floor level is 2 1 m or 7 ft.
The code regulates this minimum sill height only.
If the height of the door is 7 ft and the height of the window is 4 ft then the height of the window will be 7 ft 4 ft 3 ft.
It can be simply calculated by following calculations windows height from floor level height of door height of window.
Exceptions can be made for windows that do not open more than 4 inches or that have window guards or opening control devices in compliance with astm f2090 17.
One or more walking surface s are within 36 inches 914 mm measured horizontally and in a straight line of the plane of the glazing.
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.
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.
Window wells serving an egress window shall not be less than 9 square feet in area with a horizontal length width of no less than 36 inches.
