Building Planning Codes
IRC Code Section R310
EMERGENCY ESCAPE AND RESCUE OPENINGS
R310.1 Emergency escape and rescue required.
Basements and every
sleeping room shall have at least one operable emergency and rescue opening.
Such opening shall open directly into a public street, public alley, yard or
court. Where basements contain one or more sleeping rooms, emergency egress
and rescue openings shall be required in each sleeping room, but shall not
be required in adjoining areas of the basement. Where emergency escape and
rescue openings are provided they shall have a sill height of not more than
44 inches (1118 mm) above the floor. Where a door opening having a threshold
below the adjacent ground elevation serves as an emergency escape and rescue
opening and is provided with a bulkhead enclosure, the bulkhead enclosure
shall comply with Section R310.3. The net clear opening dimensions required
by this section shall be obtained by the normal operation of the emergency
escape and rescue opening from the inside. Emergency escape and rescue
openings with a finished sill height below the adjacent ground elevation
shall be provided with a window well in accordance with Section R310.2.
2006 INTERNATIONAL RESIDENTIAL CODE®
and rescue openings
shall open directly into a public way, or to a yard or court that opens to a
Basements used only
to house mechanical equipment and not exceeding total floor area of 200
square feet (18.58 m2).
All emergency escape
and rescue openings shall have a minimum net clear opening of 5.7 square
feet (0.530 m2).
Grade floor openings
shall have a minimum net clear opening of 5 square feet (0.465 m2).
The minimum net clear
opening height shall be 24 inches (610 mm).
The minimum net clear
opening width shall be 20 inches (508 mm).
Emergency escape and
rescue openings shall be operational from the inside of the room without the
use of keys, tools or special knowledge.
R310.2 Window wells.
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
area of the window well shall allow the emergency escape and rescue opening
to be fully opened.
The ladder or steps
required by SectionR310.2.1 shall be permitted to encroach a maximum of 6
inches (152 mm) into the required dimensions of the window well.
R310.2.1 Ladder and
Window wells with a vertical depth greater than 44 inches (1118 mm) shall be
equipped with a permanently affixed ladder or steps usable with the window
in the fully open position. Ladders or steps required by this section shall
not be required to comply with Sections R311.5 and R311.6. Ladders or rungs
shall have an inside width of at least 12 inches (305 mm), shall project at
least 3 inches (76 mm) from the wall and shall be spaced not more than 18
inches (457 mm) on center vertically for the full height of the window well.
shall provide direct access to the basement. The bulkhead enclosure with the
door panels in the fully open position shall provide the minimum net clear
opening required by Section R310.1.1. Bulkhead enclosures shall also comply
with Section R3188.8.131.52.
R310.4 Bars, grilles,
covers and screens.
covers, screens or similar devices are permitted to be placed over emergency
escape and rescue openings, bulkhead enclosures, or window wells that serve
such openings, provided the minimum net clear opening size complies with
Sections R310.1.1 to R310.1.3, and such devices shall be releasable or
removable from the inside without the use of a key, tool, special knowledge
or force greater than that which is required for normal operation of the
escape and rescue opening.
escape windows under decks and porches.
windows are allowed to be installed under decks and porches provided the
location of the deck allows the emergency escape window to be fully opened
and provides a path not less than 36 inches (914 mm) in height to a yard or