2608 23RD ST 2017-08-25 - Laserfiche WebLink

BUILDING PLANNING SECTMN R310 required to comply with Sections R311.7 and R311.8. EMERGENCY ESCAPE AND RESCUE OPENINGS Ladders or rungs shall have an inside width of not less 8310.1 Emergency escape and rescue opening required. than 12 inches (305 mm), shall project not less than 3 Basements, habitable attics and every sleeping room shall inches (76 mm) from the wall and shall be spaced not havenot less than one operable emergency escape and rescue more than 18 inches (457 mm) on center vertically for opening. Where basements contain one or more sleeping the full height of the window well. rooms, an emergency escape and rescue opening shall be R310.2.3.2 Drainage.Window wells shall be designed required in each sleeping room. Emergency escape and res- for proper drainage by connecting to the building's cue openings shall open directly into a public way, or to a foundation drainage system required by Section R405.1 yard or court that opens to a public way. or by an approved alternative method. Exception: Storm shelters and basements used only to Exception: A drainage system for window wells is house mechanical equipment not exceeding a total floor not required where the foundation is on well-drained area of 200 square feet(18.58 m2). soil or sand-gravel mixture soils in accordance with 11310.1.1 Operational constraints and opening control the United Soil Classification System,Group I Soils, devices. Emergency escape and rescue openings shall be as detailed in Table R405.1. operational from the inside of the room without the use of R310.2.4 Emergency escape and rescue openings under keys,tools or special knowledge.Window opening control decks and porches. Emergency escape and rescue open- devices complying with ASTM F 2090 shall be permitted ings shall be permitted to be installed under decks and for use on windows serving as a required emergency porches provided that the location of the deck allows the escape and rescue opening. emergency escape and rescue openings to be fully opened R310.2 Emergency escape and rescue openings.Emergency and provides a path not less than 36 inches (914 mm) in escape and rescue openings shall have minimum dimensions height to a yard or court. as specified in this section. R310.3 Emergency escape and rescue doors.Where a door 11310.2.1 Minimum opening area. Emergency and is provided as the required emergency escape and rescue escape rescue openings shall have a net clear opening of opening, it shall be permitted to be a side-hinged door or a not less than 5.7 square feet (0.530 mZ). The net clear slider.Where the opening is below the adjacent ground eleva- opening dimensions required by this section shall be tion,it shall be provided with a bulkhead enclosure. obtained by the normal operation of the emergency escape R310.3.1 Minimum door opening size. The minimum and rescue opening from the inside. The net clear height net clear height opening for any door that serves as an opening shall be not less than 24 inches(610 mm)and the emergency and escape rescue opening shall be in accor- net clear width shall be not less than 20 inches(508 mm). dance with Section R310.2.1. Exception: Grade floor or below grade openings shall 11310.3.2 Bulkhead enclosures. Bulkhead enclosures have a net clear opening of not less than 5 square feet shall provide direct access from the basement. The bulk- (0.465 m). head enclosure shall provide the minimum net clear open- R310.2.2 Window sill height. Where a window is pro- ing equal to the door in the fully open position. vided as the emergency escape and rescue opening,it shall R310.3.2.1 Drainage. Bulkhead enclosures shall be have a sill height of not more than 44 inches (1118 mm) designed for proper drainage by connecting to the above the floor; where the sill height is below grade, it building's foundation drainage system required by Sec- shall be provided with a window well in accordance with tion R405.1 or by an approved alternative method. Section R310.2.3. Exception: A drainage system for bulkhead enclo- 11310.2.3 Window wells. The horizontal area of the win- sures is not required where the foundation is on dow well shall be not less than 9 square feet(0.9 in),with well-drained soil or sand-gravel mixture soils in a horizontal projection and width of not less than 36 inches accordance with the United Soil Classification Sys- (914 mm). The area of the window well shall allow the tem,Group I Soils,as detailed in Table R405.1. emergency escape and rescue opening to be fully opened. 81310.4 Bars,grilles,covers and screens.Bars,grilles,cov- Exception: The ladder or steps required by Section ers,screens or similar devices are permitted to be placed over R310.2.3.1 shall be permitted to encroach not more emergency escape and rescue openings,bulkhead enclosures, than 6 inches(152 mm)into the required dimensions of or window wells that serve such openings, provided that the the window well. minimum net clear opening size complies with Sections R310.2.3.1 Ladder and steps. Window wells with a R310.1.1 to R310.2.3,and such devices shall be releasable or vertical depth greater than 44 inches (1118 mm) shall removable from the inside without the use of a key,tool,spe- be equipped with a permanently affixed ladder or steps cial knowledge or force greater than that required for the nor- usable with the window in the fully open position.Lad- mal operation of the escape and rescue opening. ders or steps required by this section shall not be 62 2015 INTERNATIONAL RESIDENTIAL CODE°