3.3.2 Prototypes A1, A3 and A20

Prototypes A1, A3 and A20 are all office buildings. They have the same 150 ft by 150 ft floor plate with a simple 15 ft perimeter zone. The main difference between the prototypes is the number of stores. A1 is a single story, A3 has three stories and A20 has twenty stories.

All three prototypes have a 12 floor-to-floor height and a plenum with a height of 3 ft 6 in. Ceiling height is 8 ft 6 in. Prototypes A1 and A3 have a window wall ratio of 31%; fenestration consists of 10 ft by 5 ft 6 in. windows spaced around the perimeter at 15 ft. Prototype A20 has a window-wall-ratio of 71% with floor-to-ceiling glass on all sides. Figure 3.3.2-1 is a visual image of the three prototype buildings.

Prototype A1 is a wood framed building while prototypes A3 and A20 are steel framed.

Detailed specifications for each of the prototype building models are presented in spreadsheets included in Portfolio Appendix E.

Figure 3.3.2-1: "Prototypes A1, A3 and A20"