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1.3 Auditorium / Theatre 1.3.1 Introduction

Figure 3.1 Lobby Section

The Auditorium / Theatre space is located in the art wing of the building. This space is designed to have two different functioning conditions. The first is during the day when the space will serve as an assembly hall and meeting area for large groups that visit the zoo. Also during the day this space can be used for special presentations. Functions for this space during this time include: reading (handouts or schedules), writing (notes or directions), and personal interaction (with other audience members or presenter). In the evening this space has a much more theatrical function. The zoo is hoping to be able to rent out the space for social functions or for theatrical performances. Functions during this time include: reading (play bill, program), and personal interaction (with other audience members). The walls in this space are stained concrete block with cedar panel accents, the floor is poured stained concrete, and the ceiling is tongue and groove wood deck with exposed glulam structural system.

1.3.2 Design Concepts

The design concept for this space was to provide an interesting and engaging atmosphere while maintaining the architectural style of the space. To do this I used a tungsten halogen down lighting system for area lighting (Figure 3.3) and then accented specific architectural elements (Figure 3.4). The architectural elements that I chose to accent Figure 3.2 Auditorium / Theatre

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were the glulam beam structural system and also the angled cedar panels on either side of the stage. To accent the glulam beams I used tungsten halogen spots and to accent the cedar panels I used linear fluorescents descending in brightness from the stage. The varied functions of this space make flexibility important. To provide the necessary flexibility all fixtures in this space Figure 3.3 Section Lighting Accents will be dimmable. This will allow for the creation of separate settings for day and night functions.

Figure 3.4 Section General Lighting 1.3.3 Design Criteria

Modeling of Faces or Objects: In this space the person or persons on that stage will have very good facial modeling due to

the theatrical lighting. However, I believe that facial modeling is also important for the audience to allow for ease of audience participation and interaction. It is also important to allow the audience to interact among themselves before a show or performance begins.

Color Appearance: This is important because in addition to the performers on stage you want the audience

members to look good during intermission times or during some audience participation. System Control and Flexability: This is critical for this space. There must be a variety of lighting scenes available to choose

from. This is important because of the variety of lighting conditions that are necessary. They range from a bright open atmosphere to a completely dark atmosphere.

Points of Interest: In this space the points of interest when the house lights are on should be the exposed

structural system supporting the roof. When the house lights are off the stage should be the major point of interest.

Horizontal Illuminance: 10 fc on the floor ANSI/ASHRAE/IESNA Standard 90.1 – 2001: Power Density: 2.6 Watts/sq.ft

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1.3.4 Equipment

Fixture Schedule

*Cut Sheets for Fixtures and Ballasts can be found in Appendix A-3 *All Lamps provided by Sylvania

Lighting Plan

Fixture Type Manufacturer Lamp Ballast Watts/Fixture CCT Controls

T1

Tungsten Halogen Cylinder

Downlight

Kurt Versen 1-250W T4 N/A 250 3000 Switch / Dimmer

T2 Tungsten Halogen Spot Erco 1-50W

QT12 N/A 50 3000 Switch / Dimmer

F3 Fluorescent Strip Light Lithonia 2-32W-T8

Lutron Eco-10 Electronic Dimming

100% to 10% 63.71 3000 Switch / Dimmer

F4 Fluorescent Strip Light Lithonia 1-32W-T8

Lutron Eco-10 Electronic Dimming

100% to 10% 38.78 3000 Switch / Dimmer

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1.3.5 Analysis

Light Loss Factors

Fixture LLD Maintenance Category

Degree of

Dirtiness Cleaning

Cycle LDD Luminaire Distribution

Room Cavity Ratio

RSDD Ballast Factor

Light Loss

Factor T1 0.98 IV Clean 12months 0.89 Direct 6.66 0.964 1 0.84 T2 0.98 IV Clean 12months 0.89 Direct 6.66 0.964 1 0.84 F3 0.9 IV Clean 12months 0.89 Direct 6.66 0.964 0.9 0.69 F4 0.9 IV Clean 12months 0.89 Direct 6.66 0.964 0.9 0.69

Power Density

Room Fixture Watts/Fixture # Total

Auditorium T1 250 22 5500 T2 50 6 300 F3 63.71 8 509.68 F4 38.78 16 620.48 Total Watts 6930.16 Watts/sq.ft. 2.58

Renderings

Figure 3.5 Auditorium / Theatre Audience Rendering

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Figure 3.6 Auditorium / Theatre Section Rendering

Calculation Grids

Figure 3.7 Pseudo-color of Room Illuminance Levels

The illuminance map of the auditorium (Figure 3.7) shows that the downlighting is providing more than adequate light levels for all possible functions of the space.

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1.3.6 Conclusion The direct tungsten halogen general lighting complimented with linear fluorescent and tungsten halogen accent lighting worked well to meet the space’s requirements. The direct tungsten halogen general lighting provides high enough light levels to fulfill the daytime auditorium functions of the space (Figure 3.7) while keeping the power density under the ASHRAE Standard 90.1. The accent lighting does a nice job of highlighting some of the spaces more important architectural elements and making the space more interesting and engaging. The linear fluorescent washing of the cedar panels also helps to frame and draw your attention to the stage. The entire lighting system for this space is dimmable which provides the flexibility essential to the success of this space.