This research presents how to make more efficient management for preventing accidents in construction site. One of the most efficient way to do so is to quantify those potential hazards and risks, resulting from it. Also it has been tried to rate & weigh each item of those hazards, depending on the degree of risk. The goal of this qualification method is to establish ensuring the required safety. These are rated & compared with the degree of understandings of each item & accomplishment of those codes.