The statistic of accidents at construction sites give us a picture that Malaysian construction industry is one of the critical sectors that need a huge and fast overhaul. In order to improve the overall safety performance, a policy of occupational safety and health (OSH) was enforced by the government as a guideline and rules that should be followed in dealing with OSH activities at the construction site. Therefore, a study has been conducted to identify the types of accidents that occurred at construction sites based on OSH guidelines of the public and workers and to evaluate the implementation of the variables in the OSH guidelines that give impact to contractors’ grade. This study was started out by identifying the 12 variables of the OSH guidelines. Then reported accidents cases from 2010 to 2013 kept by the Department of Occupational Safety and Health Malaysia (DOSH) were examined and classified according to the variables to identify the types of accidents. The observations by using checklist were carried out at 12 construction sites around the district of Melaka Tengah involving contractors of G6 and G7. Structural interviews were also be made to support the observations that have been carried out. The finding of this study reveals that all variables directly involved in contributing to the accident at the construction site. Accidents due to superstructure activities topped the list in the past four years. Apart, the observations found that the level of compliance with OSH by both grades of contractors at the construction sites were unsatisfactory since OSH policy was not fully practiced. Non-compliance of hoarding set up became the critical variable. This mismatch is further examined by correlation analyses which link both objectives and demonstrated a weak relationship. Thus, the research concluded that non-compliance of contractors on OSH policy was not the main contributing factor for most accidents at the construction site.