Agenda - 04-18-2006-7c - Laserfiche WebLink

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3 The Triangle J Guidelines specifically include daylighling and direct views from inside Io outside spaces as sustainable building strategies Guideline 6 10 (see attached copy) stoles the following intent: "Achieve a quality of Iighl Thal is beneficial fo building activities and occupants to provide a connection between indoor spaces and the outdoor environment Through the introduction of sunlight and views into the occupied areas of the building " As a resuh, the Triangle.] Guidelines suggest approaches Thal "maximize direct line of sight and orient buildings to maximize daylighling options "Among the specific steps, the Guidelines urge designers to "consider shallow or narrow building fool prints" and to "employ courtyards, atriums, clerestory windows, skylights and light shelves to achieve daylight penetration "Providing 90% of occupied spaces with direct views is a staled goal of the Guidelines These considerations, among others, led Io the approach that produced a design for the SWOC design Thal consisted of Iwo volumes, each with offices along a double loaded corridor, rather Than a single volume Iha1 buried Iwo rows of offices on the interior The design is similar in many respects to schools and other public buildings thol array occupied spaces along central corridors, each space having both interior and exterior walls In response Io the Board's questions, and for purposes of This follow-up discussion, Dixon Weinstein diagrammed a single volume Alternate Scheme to compare with the proposed Schematic Design The diagrams and comparisons appear on the following page, and are summarized below: Schematic Design Healed area: 8,100 sf Healed perimeter. 676 linear ft Occupied area: 74% Circulation/service: 26% Spaces w/direct views: 96% X26 of 271 2 Ahernale Scheme Healed area: 7,800 sf Healed perimeter: 430 linear ft Occupied: 73% Circulation/service: 27% Spaces w/ direct views 56% (15 of 271 Additionally, Dixon Weinstein's building performance consuhanls on the SWOC project, Environmental Quality Control of Chapel Hill, compared energy Toads of the Schematic Design and the Alternate The consuhanls assigned an additional lighting requirement to the interior portion of the Ahernale to compensate for its reduced daylighling EOC's analysis showed that the additional lighting reduced the Ahernale's healing requirement in the winter buI increased its summer cooling requirement to the point That cooling was identical to the Schematic Design More elaborate and extensive life-cycle cost comparisons of the Iwo approaches are possible with additional design work, if the Commissioners choose to seek (hose services Based on our experience, however, we are satisfied that the proposed Schematic Design represents a sound sustainable building approach that balances the costs of building perimeter with the benefits it affords 25 The Gvutlyvrd 43I W Frmkliv Srrem Chapel Hill. N C 27516 9I9 96H H333 919 969 0477 Fax www dixanwainslein cvm