Minimum 5 7 square feet of net clear opening area.
Montana egress window well requirements.
Windows can be of various total size but their free areas when open must be at least 5 7 square feet.
Thirty six inches 914 mm where the aisleserves less than 50 seats.
Montana building code code requires that the opening of an egress be equal or greater than 5 7 square feet with a minimum opening height of 24 inches and a minimum opening width of 20 inches.
An egress ladder or step may encroach into well up to 6.
The minimum horizontal area of the window well shall be 9 square feet 0 9 m2 with a minimum horizontal projection and width of 36 inches 914 mm.
The sill must be no higher than 44 inches from the ground.
If the basement does not have a bedroom and is over 220 square feet one egress window is required.
Width x projection egress ladders and or steps.
Basement windows of denver by kruse construction installs code complaint egress windows that are all inspected by city building inspectors.
The ladder or steps required by section r310 2 1 shall be permitted to.
The distance from the egress window to the back of the egress well must be at least 36 the minimum area of the egress well must be 9 square feet.
The minimum horizontal area of the window well shall be 9 square feet with a minimum horizontal projection and width of 36 inches.
Minimum 20 inches of net clear width.
Egress window and well requirements an egress window must open at least 20 inches wide and 24 inches high with a net clear open area of 5 7 feet square.
Egress ladders and or steps are required on window wells deeper than 44 and must be permanently attached.
Thirty inches 762 mm where the aisledoes not serve more than 14 seats.
The minimum horizontal area of the window well shall be 9 square feet 0 9 m2 with a minimum horizontal projection and width of 36 inches 914 mm.
Therefore let us recap on the residential emergency escape and rescue opening requirements.
Thirty six inches 914 mm for level or ramped aisleshaving seating on only one side.
Minimum 24 inches of net clear height opening.
5 0 square feet allowed if located at grade floor or below.
The area of the window well shall allow the emergency escape and rescue opening to be fully opened.
The horizontal area of the window well needs to be a minimum of nine square feet with a minimum horizontal projection and vertical width of 36 inches.
Building code currently requires egress windows be installed in each basement bedroom.
The bottom sill height shall be no more than 44 inches from the floor.
The egress well must not interfere with the egress window fully opening.
Window wells are required if the window is below ground level.
To obtain more information please call 406 455 8457.
Ladder and steps are required when the depth is greater than 44 inches.
Given the math involved some homeowners may expect the dimensions to be the toughest part of installing a window well.
