The sites of construction are considered hazardous as occupational injuries as well as casualties have been recorded at higher level. It has been observed that these accidents in larger manner have occurred more importantly in the sites of residential & commercial building. As the labours of construction were most important and dynamic elements in an industry of construction & the cost of them have represented almost half of cost of construction in overall manner. This condition means improving the workers’ ergonomic performance have become a good level of target for many companies of construction. Hence, for assessing the environmental effects on the worker’s performance, the extension of the particular risk which has been associated with tools/equipment’s manual handling, equipment & tools’ details & other kind of issues which has been related while the workers have been engaged in the jobs of construction in this particular context, ergonomic principles in an appropriate level which has been needed to be applied for minimizing the hazards of health for the purpose of ensuring the workers’ comfort & safety. This study endeavors to recognize and explain the human factors influencing health and safety performances in Construction industry. Survey questionnaires were used with delivery and collection methods in the present study. Construction practitioners who wish to improve their firms' safety records may find the results of this study useful.