Overhead Cost Examples

Hi,

I’m trying to find some information to justify the overhead costs (Project Management & Controls) on a project. Does anyone know of a source of sample construction project cost data? Or an industry standard for what overhead cost usually is as a percentage of total? Or even some text book information on what the percentage should be! The number I keep seeing banded around for profit and overhead is 15%...but I need some justification for why this is roughly correct.

Thanks in advance...