Calculations
Strakosch, George R., and Robert Caporale, ed. The Vertical Transportation Handbook. New Jersey: John Wiley & Sons Inc., 2010
Code
http://www.ada.gov/2010ADAstandards_index.htm
http://www2.iccsafe.org/states/newyorkcity/Building/Building-Frameset.html
http://specsandcodes.typepad.com/the_code_corner/2012/02/elevators.html
