Western Steel Erection plan review notes

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1003.2.2.2.3 1997 UNIFORM BUILDING CODE 1003.2.8.2 1003.2.2.2.3 Areas with fixed seats. For areas having fixed 1003.2.3.3 Maintaining width.If the minimum required width seats,the occupant load for such areas shall be determined by the of the means of egress system increases along the path of exit trav- number of fixed seats installed therein. el based on cumulative occupant loads served, such width shall For areas having fixed benches or pews,the occupant load shall not be reduced or otherwise diminished to less than the largest not be less than the number of seats based on one person for each minimum width required to that point along the path of exit travel. 18 inches(457 mm)of length of pew or bench.Where fixed booths EXCEPTION:In other than Group H,Divisions 1,2,3 and 7 Occu- are used in dining areas,the occupant load shall be based on one panties,the width of exterior exit doors from an exit enclosure may be person for each 24 inches(610 mm)of booth length.Where fixed based on the largest occupant load of all levels served by such exit en- benches, pews or booths are curved,the larger radius shall deter- closure multiplied by a factor of 0.2(5.08). mine the booth length. 1003.2.3.4 Exiting from adjacent levels.No cumulative or con- tributing occupant loads from adjacent building levels need be 1003.2.2.2.4 Outdoor areas.The occupant load of yards,patios, considered when determining the required width of means of courts and similar outdoor areas shall be assigned by the building egress components from a give%level. official in accordance with their anticipated use. Such outdoor Where an exit enclosure from an upper floor and a lower floor areas accessible to and usable by the building occupants shall be converge at an intermediate floor, the width of the exit from the provided with a means of egress as required by this chapter.Where intermediate floor shall be based on the sum of the occupant loads an outdoor area exits only through a building,the occupant load of of such upper and lower floors. such outdoor area shall be considered in the design of the means of egress system of that building. 1003.2.3.5 Two-way exits.Where exit or exit-access doorways serve paths of exit travel from opposite directions, the width of 1003.2.2.2.5 Reviewing stands, grandstands and bleachers. such exit or exit-access doorways shall be based on the largest oc- The occupant load for reviewing stands,grandstands and bleach- cupant load served.Where such exit or exit-access doorways are ers shall be calculated in accordance with Section 1003.2.2.2 and required to swing in the direction of exit travel by Section the specific requirements contained in Section 1008. 1003.3.1.5, separate exit width for each path of exit travel shall be 1003.2.2.3 Maximum occupant load. provided based on the occupant load of the area that is served. 1003.2.4 Height.Except as specified elsewhere in this chapter, 1003.2.2.3.1 Assembly occupancies. The maximum occupant the means of egress system shall have a clear height of not less load for an assembly occupancy shall not exceed the occupant than 7 feet(2134 mm)measured vertically from the walking sur- load determined in accordance with Section 1003.2.2.2. face to the lowest projection from the ceiling or overhead struc- EXCEPTION:When approved by the building official,the occu- ture. pant load for an assembly occupancy may be increased,provided the EXCEPTION: Sloped ceilings permitted by Section 310.6.1. maximum occupant load served does not exceed the capacity of the 1003.2.5 Exit continuity.The path of exit travel along a means of means of egress system for such increased number of occupants. egress shall not be interrupted by any building element other than For temporary increases of occupant loads in places of assem- a means of egress component as specified in this chapter.Obstruc- bly,see the Fire Code. tions shall not be placed in the required width of a means of egress 1003.2.2.3.2 Other occupancies.For other than assembly occu- except projections permitted by this chapter.The required capac- pancies,an occupant load greater than that determined in accord- ity of a means of egress system shall not be diminished along the ante with Section 1003.2.2.2 is permitted;however,the means of Path of exit travel. egress system shall comply with the requirements of this chapter 1003.2.6 Changes in elevation. All exterior elevation changes for such increased occupant load. and interior elevation changes of 12 inches (305 mm) or more along the path of exit travel shall be made by steps,stairs or stair- 1003.2.2.4 Minimum occupant load. An occupant load less ways conforming with the requirements of Section 1003.3.3.3 or than that determined in accordance with Section 1003.2.2.2 shall ramps conforming with the requirements of Section 1003.3.4. not be used. Interior elevation changes of less than 12 inches (305 mm) 1003.2.2.5 Revised occupant load.No increase in occupant load along the path of exit travel serving an occupant load of 10 or more shall be made to any existing building or structure unless the shall be by ramps conforming with the requirements of Section means of egress system is made to comply with the requirements 1003.3.4. of this chapter for such increased occupant load.See Section 3405. EXCEPTIONS: 1.In Group R,Division 3 Occupancies and within individual dwelling units of Group R,Division l Occupancies. 1003.2.3 Width. 2.Along aisles adjoining seating areas. 1003.2.3.1 General.The width of the means of egress system or 1003.2.7 Elevators or escalators. Elevators or escalators shall any portion thereof shall be based on the occupant load served. not be used as a required means of egress component. 1003.2.3.2 Minimum width.The width,in inches(mm),of any 1003.2.8 Means of egress identification. component in the means of egress system shall not be less than the 1003.2.8.1 General. For the purposes of Section 1003.2.8, the product determined by multiplying the total occupant load served term"exit sign"shall mean those required signs that indicate the by such component by the applicable factor set forth in Table path of exit travel within the means of egress system. 10-B.In no case shall the width of an individual means of egress 1003.2.8.2 Where required.The path of exit travel to and within component be less than the minimum required for such compo- exits in a building shall be identified by exit signs conforming to compo- nent as specified elsewhere in this chapter. the requirements of Section 1003.2.8. Exit signs shall be readily Where more than one exit or exit-access doorway serves a visible from any direction of approach.Exit signs shall be located building or portion thereof,such calculated width shall be divided as necessary to clearly indicate the direction of egress travel.No approximately equally among the means of egress components point shall be more than 100 feet(30 480 mm) from the nearest serving as exits or exit-access doorways for that area. visible sign. 1-106