DAYLIGHTING DESIGN Strategies for Achieving Quality Daylighting Spring 2014 College of Architecture, Texas Tech University 1
DAYLIGHTING DESIGN TOPLIGHTING Criteria & Preliminary Sizing Based on The Architect s Studio Companion: Rules of Thumb for Preliminary Design by Edward Allen & Joseph Iano. John Wiley and Sons, Inc. Hoboken, New Jersey. 5 th edition. 2012. Spring 2014 College of Architecture, Texas Tech University 2
Designing W/ Natural Light 1. Determine Availability of Natural Light. 2. Identify Program Needs. 3. Identify Daylighting Design Strategies. 4. Integrate Daylighting Strategy w/ Whole Building Concept. 5. Integrate with Electrical Lighting. 6. Effectively Optimize Design Strategy. 7. Check and Test Design. Spring 2014 College of Architecture, Texas Tech University 3
Retail Center Spring 2014 College of Architecture, Texas Tech University 4
Pre-Design Design Conditions Predominantly Clear > 70% (p. 141) No Obstructions Orientation Building Shape E-W Integrate Sidelighting & Toplighting. Building Interior Configuration Ceiling Shape Lighting Level Category D Skydome Obstructions Sky Cover Conditions Ceiling Shape Toplighting Architect s Studio Companion, Allen & Iano, 5e Spring 2014 College of Architecture, Texas Tech University 5
Daylighting & Energy p. 147 Small Buildings Envelope Load Dominated Lighting Load - minimal Heating and Cooling Load driven by Climate. Cold Climates Daylight with Passive Solar Hot Climates Daylight improves Efficacy Large Buildings Internally Load Dominated Lighting Load - significant Cooling Load - significant Heating Load minimal Daylight improves Efficacy Daylight reduces Lighting Power Load Architect s Studio Companion, Allen & Iano, 5e Spring 2014 College of Architecture, Texas Tech University 6
CONFIGURING AND SIZING Toplighting Strategies Based on The Architect s Studio Companion: Rules of Thumb for Preliminary Design by Edward Allen & Joseph Iano. John Wiley and Sons, Inc. Hoboken, New Jersey. 5 th edition. 2012. Spring 2014 College of Architecture, Texas Tech University 7
Retail Center Spring 2014 College of Architecture, Texas Tech University 8
Concept Design Strategies Retail Center Glazing Height 13 ft. Full Daylighting - 25 Glazing Area 200+ sf. Develop Shading System. Develop Alt. Strategy Partial Daylight Full Daylight Toplighting 200 sf. Spring 2014 College of Architecture, Texas Tech University 9
Toplighting Concerns p. 154 Higher the Ceiling the Better. Higher opening more spread Light falls off from the Opening Skylight vs. Roof Monitor Roof Monitor Orientation South ~= Skylight North, East, & West ½ the Skylight Exterior Control Orientation, Shades Louvres, etc. except in Overcast Skydome Climates Consider Interior Controls Reflectors, Ceiling Shape, etc. Architect s Studio Companion, Allen & Iano, 5e Spring 2014 College of Architecture, Texas Tech University 10
Toplighting Concerns p. 154 Toplight Spacing 1-2x the Ceiling to Floor Height Toplight W/ Sidelighting Location: 1.5 x Hs or less Hs = 13 ft. in Retail Center Depth: 2 x Ht or less Architect s Studio Companion, Allen & Iano, 5e Spring 2014 College of Architecture, Texas Tech University 11
Concept Design Strategies Retail Center Sidelighting Glazing Height 13 ft. Full Daylighting - 25 Glazing Area 200+ sf. Floor Area = 25 x 32 ~ 800 sf. Multiple Small Skylights 2 x 2 Skylights Partial Daylight Full Daylight ~800 sf. 200 sf. Spring 2014 College of Architecture, Texas Tech University 12
Toplight Spacing p. 153 Toplighting Spacing Floor to Ceiling = 13 ft.+ Horizontal Spacing Small Skylights = 12 ft. Roof Monitors = 18 ft. Skylights >30 sf. = 25 ft. Spring 2014 College of Architecture, Texas Tech University 13
Toplight Area p. 153 Toplighting Area Floor Area = ~800 sf. Toplighting Area Category D Skylight Area = 15 to 35 sf. Roof Monitor-S = 15 to 35 sf. Roof Monitor-N, E & W = 2x Area Spring 2014 College of Architecture, Texas Tech University 14
Concept Design Strategies Retail Center Toplighting Skylights Skylight Area =15 sf. 2 x2 Skylight = 4 sf. 15 sf. / 4 sf. = 3.75 = 4 ea. 12 ft. spacing Roof Monitor North Monitor Area 2 x 15 s.f = 30 sf. 2.66 x 2.66 = 7.08 sf. 30 sf. / 7.08 sf. = 4.23 ea. 12 Toplighting 25 Full Sidelighting 200 sf. Spring 2014 College of Architecture, Texas Tech University 15
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