[rahul saini]

The atrium space type includes glazed courtyard spaces and multistoried spaces. Atria are typically used as key architectural features in main entries, public circulation areas or as special destinations within a building. Atrium design often involves skylights and generous glazing areas that provide an infusion of natural light which make them a prominent building areas well suited to serve ceremonial and social functions.

The atrium space type requires flexibility, durable finishes, attention to regular maintenance, and special HVAC systems and lighting. 

Typical features of atrium space types include 
Accessibility - accessible elevators and ramps in addition to stairways.


Aesthetics -

• Highlight or soften the verticality of the space by delineating horizontal bands (such as at floor or ceiling levels) with windows, lighting, wall coverings, and signage.
  
• Specify appropriate finishes for open stairways, pedestrian bridges, and other transitional spaces that match finishes in adjacent spaces.
  
• Include glazing system materials or detailing that emits natural light, but prevents glare and light reflection.
  
  

Functional / Operational

• Design appropriate spaces for the unique requirements of plant species, including attention to lighting, temperature, and air flow. Specify plants with comfort levels similar to occupant comfort levels.
  
• Accommodate flexibility and storage of furniture and equipment for ceremonial events and exhibits.
  
• Design for maintainability of hard to reach areas, such as re-lamping of high light fixtures and periodic cleaning of dust gathering surfaces.
  

Productive

• Specify HVAC equipment that will ensure a comfortable and reliable temperature. 
  
• If the atrium will be used for performances or ceremonies, study its acoustic properties and include sound absorptive materials as needed.
  
  

 Security / Safety

• Provide for smoke control/Fire protection engineering requirements.
  
• In high-risk buildings incorporate blast-resistive design in atria structural system and glazing.
  
• Design for safety in balconies 
  

Sustainable.

• Atria can be used as light courts. Utilize daylight to reduce energy use through skylights and window walls.
  
• Create a vertical "chimney" effect with low intakes and high outlets to facilitate natural ventilation.
  

For details : http://www.wbdg.org/design/atrium.php