Last Uploaded: April, 2011

Keio University Hiyoshi Campus Fourth Building, Independence Wing

Architectural DataFeaturesCasbee ScoreTechnical Details建物リストに戻る
Campus layout plan
Campus layout plan Pedestrian circulation conceptual diagram Conceptual floor plan Conceptual plan of indoor-outdoor connecting space
Green space plan #1 Green space plan #2 Rooftop garden Classroom

Special Features

Q-1 Indoor Environment
  • Noise criteria (NC) level of 25-30
  • Classroom sash sound insulationperformance of class T-2
  • Large lecture theater wall sound insulation performance of TLD-56 (D-45)
  • Classroom floor sound insulation performance of L-55
  • Majority of classrooms achieve a daylight factor of 3.0 or higher
  • Installation of effective skylights as a means of increasing daylight usage
  • Daylight control through the use of eaves and blinds
  • Achieves lighting intensity of 750 lux or higher
  • Used construction materials with low VOC discharge
  • External air inlet volume 25m3 / person / hour
  • No smoking allowed inside the building
Q-2 Quality of Service
  • Complies with the Heart Building Law
  • Classroom ceiling height of 3.2m-3.95m
  • A space with a diverse array of features that encourages communication
  • Aseismic performance that exceeds the legally mandated level by 50%
  • Utilizes seismic isolation system
  • Architectural precast concrete panels faced with porcelain tiles
  • 30-year interval between renewals
  • Air conditioning systems in high-priority rooms have autonomous ducting to external units
  • A facilities plan that follows the seismic isolation system
  • Measures undertaken to reduce risk of electrical room flooding
  • Each floor has a height of 4.0m or over
  • Rack ES full-surface inspection flaps and underfloor cable routing for office automation (OA) equipment
  • Telecommunication cable routing may be reconfigured without causing damage to structural members or finishing materials
Q-3 Outdoor Environment on Site
  • Understanding of the site's vegetation and biological environment
  • Creation of cherry blossom and zelkova tree-lined avenues and other continuous green spaces to enhance amenity value for strolling
  • Reuse of site's existing topsoil
  • Provision of habitat for birds
  • Over 60% of external area made into green space
  • Building green space rating of 0.06
  • Provision of green roadside space for the enjoyment of pedestrians
  • Provision of intermediary spaces linking building interior with the outside (approach avenue, etc.)
  • Plan to enhance line of sight by demolishing an existing concrete retaining wall
  • Indoor-outdoor connecting space provides a pathway for the wind
  • Provision of shade from the sun and green areas and the use of water-retentive pavement material contribute to improvement in the site's thermal environment
LR-1 Energy
  • Use of low-E glass; PAL value of 272.3
  • Atrium skylight facilitates natural lighting / air flow / ventilation system
  • Reduction of outdoor air thermal load through the use of total heat exchanger
  • Cool tube utilizing seismic isolation level
  • Adoption of an air conditioning operational-data management system that is able to conduct a range of measurements of energy conservation performance
LR-2 Resources and Materials
  • Measures to conserve water, including automatic faucets, water-saving faucets and user sensor systems
  • Use of rainwater to supply water for toilets and urinals
  • Use of electric furnace steel in main structure; use of Portland blast furnace cement in some parts of main structure
  • Use of recycled lumber in roof garden floor deck
  • Use of construction materials that do not contain hazardous substances
  • Reuse of concrete structure of previous building in exterior design
  • Non-use of halon fire extinguishing agents
  • Use of insulation materials which have ratings of ODP=0 and GWP=0
LR-3 Off-site Environment
  • Measures to prevent light pollution
  • No advertising signs
  • Wind environment simulations used to reduce impact on surrounding environs
  • Waste disposal burden reduced through such measures as separation of waste and separate collections for each category; paper recycling; reduction of bottle and can volumes

Other Features

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These cases are described based on assessment results obtained using CASBEE.
CASBEE is a method for rating the environmental performance of buildings using Building Environmental Efficiency (BEE) as an indicator, which is based on the results of separate scores obtained for Q-1~Q-3 (Quality) and LR-1~LR-3 (Load Reduction).