• <br />• <br />Clear Width <br />The basic clear width requirement for apparatus <br />access in the-IFC and NFPA 1 is 20 feet. NFPA 1141 <br />calls for one-way fire lanes that are 16 feet wide; <br />however, this applies to roads that do not abut <br />buildings. A clear width of 20 feet-will allow most <br />aerial apparatus to extend the outriggers necessary <br />to. supportthe aerial ladder or elevating platform <br />while in -operation (Figures 1.2 and 2.1). However, <br />some recently-manufactured aerial apparatus <br />require 24 feet of clear.width for outrigger extension <br />t <br />II <br />iii II r L± <br />T-L_n_rn_ <br />Vmri. CtT;HN, <br />Q! 'eA UI 111C <br />f- <br />s <br />- / ! ~_vz,lW.-qi, <br />Ps W) <br />(Fig. 2.4) Fire apparatus "Y-" and "T-turnarounds. " <br />Reprinted with permission from NFPA 2003 Uniform Fire <br />Code Handbook, © 2003, National Fire Protection <br />Association, Quincy, MA. <br />Lanes wide enough for apparatus to pass one <br />another will facilitate developing and expanding <br />operations. NFPA 1141 contains a 24-foot clear <br />width requirement for two-way fire lanes. Appen- <br />dix D of the IBC calls for a 26-foot clear width at fire <br />,hydrant locations, extending for a distance of 20 <br />feet in both directions, as well as a 26-foot width in <br />the vicinity of buildings that are 30 feet or. more in <br />height (for aerial-operations). NFPA 1141 also con- <br />tains guidance on access in parking lots. <br />Rolled or rounded curbs adjacent to properly <br />designed sidewalks can effectively increase access <br />width. These allow apparatus to easily negotiate <br />curbs. <br />Height <br />The basic requirement for clear height of fire lanes <br />in the IFC, NFPA 1 and NFPA 1141 is 13 feet 6 inch- <br />es. Some modern aerial apparatus may require 1.4 <br />feet of clearance. Potential for accumulation <br />of snow and ice should be factored into height <br />requirements. The NFPA 1 handbook recommends <br />at least 14 feet in colder climates. Newer aerial <br />apparatus may also require additional height. <br />Finally, avoid overhead wires or other obstructions <br />when determining fire lane locations. <br />t ,Z• ,'3 <br />Sul-~-y~, z <br />Fl- <br />(Fig. 2.5) Fire apparatus cul-de-sac turnaround. <br />Reprinted with permission from NFPA 2003 Uniform Fire <br />Code Handbook, © 2003; National Fire Protection <br />Association, Quincy, MA. <br />FIRE SERVICE FEATURES OF BUILDINGS AND FIRE PROTECTION SYSTEMS <br />129 <br />1 3 <br />249 <br />