Minimum Window Height Above Floor In Massachusetts

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.

Minimum window height above floor in massachusetts.

R310 1 3 minimum opening width. An exception from this requirement also remains in the 2018 irc for windows that do not open more than 4 inches or that are. 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. 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.

Grade floor openings shall have a minimum net clear opening of 5 square feet 0 465 m2. 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. It can be simply calculated by following calculations windows height from floor level height of door height of 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.

Minimum 24 inches of net clear height opening. The minimum window sill height requirements are intended to reduce the number of injuries from falls by children through open windows. 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. Minimum 20 inches of net clear width opening.

Fixed or operable windows must include safety glass if they measure larger than 9 feet square the bottom edge is less than 18 inches above the floor the top edge is more than 36 inches. So the standard height of the door from floor level is 2 1 m or 7 ft. The minimum net clear opening height shall be 24 inches 610 mm. The top edge of the glazing is greater than 36 inches 914 mm above the floor.

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. 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. 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. The code regulates this minimum sill height only.

Now i want to replace these 3 windows with possibly 5 windows to bypass rule 1 9sq ft area rule. R310 1 2 minimum opening height. 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.