Current Codes...

Commercial:

2011 OBC (Ohio Building Code)

Residential:

2013 RCO (Residential Ohio Building Code)

Electrical:

Commercial 2014 NEC (National Electrical Code)

Residential 2011 NEC (National Electrical Code)

HVAC, Mechanical:

Commercial, 2011 OBC (Ohio Building Code)

Residential, 2013 RCO (Residential Ohio Building Code)