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EUGENE SCHOOL DISTRICT 4J Multi- Purpose Athletic Field Concept Study — Predevelopment Meeting January 8, 1999 Page 3 Emergency Vehicle Access Access for medical emergency vehicles will be provided to each field. ❑ What are the requirements for access to each field site by apparatus? Fire Hydrants ❑ What are the requirements for locations of fire hydrants at each field site? Bleacher Seating Bleachers seating will be of aluminum and steel non - combustible construction. Proposed bleachers are to include up to 16 rows with 26 inch seat spacing, and 12 inch rise. Bench type seating without backs are planned. The 1997 OSSC code has changed the aisle width and cross aisle requirements. Maximum number of seats to an aisle is 10. Aisles are calculated under 1004.3.2.3.1 and Table 10D to be up to 9 feet wide with bleacher seating on both sides (290 seats x 0.300 x 1 (A) x 1.25 (B)). See attached sketch. ❑ Is this the correct method to calculate aisle widths for outdoor bleachers? 1004.3.2.3.1 states that where aisles converge to form a single path the aisle width shall not be more than the combined required width of the converging aisles. This would indicate a required cross aisle of up to 18 feet. ❑ Does section 1008.5.5 take precedence for the cross aisle width in bleachers? This would allow a cross aisle of a minimum of 54 inches or the "greatest of the minimum required widths as determined by 1004.3.2" which would still be 9 feet wide. ❑ Are there other code provisions or exceptions to allow for narrower aisles and cross aisle? Without any other relief, we are planning to include exit stairs directly onto the field surface near each aisle to avoid the over -wide cross aisle requirements. This will have a negative impact on security and site lines, and will cause the bleachers to be moved further from the playing field.