mark handler
SAWHORSE
International Building Code 2012 (Second Printing)
http://publicecodes.citation.com/icod/ibc/2012/index.htm?bu=IC-P-2012-000001&bu2=IC-P-2012-000019
http://publicecodes.citation.com/icod/ibc/2012/index.htm?bu=IC-P-2012-000001&bu2=IC-P-2012-000019