## Info

Section r

Section

Section

Section

Pion

Auditorium with Balcony

Plan

Auditorium without Balcony

Pion

Auditorium with Balcony

Plan

Auditorium without Balcony

Figure 17.3 Seating Layout for a Lecture Hall plan plan

It is assumed that a person will adjust his position to look between the patrons seated in the next row so most theaters are designed for every-other-row visibility.

Figure 17.4 shows a typical sight-line design problem. The slope of the floor will depend dramatically on the APS that is selected. A high APS such as that found in a movie theater will still be visible, even with a relatively shallow floor slope. Stage floor heights are set low enough that a person sitting in the front row can see the actors' feet, but high enough that the APS does not force excessive floor rake. The eye height of a seated person ranges from 44 inches (1.12 m) for an adult female to 48 inches (1.22 m) for an adult male (Ramsey and Sleeper, 1970). Stage heights are fixed at between 40 and 42 inches (1.02-1.07 m) above the floor. The floor slope is determined by drawing a series of sight lines from the APS to a patron's ear level using standard anatomical data or by iteratively

Figure 17.4 Geometry of Theatrical Sight Line Calculations Every Other Row Sight Lines

Figure 17.4 Geometry of Theatrical Sight Line Calculations Every Other Row Sight Lines

Geometry For a negative starting angle

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