Objectives: Construction and Demolition (C and D) wastes affect negatively to environment and economic of Iraq. This paper presents the severity of 78 identified factors contributing to C and D waste generation in Iraqi construction industries. Methods/Statistical Analysis: The structured questionnaire survey amongst contractors, consultants and clients was conducted and a total of 208 valid response data was collected for the analysis purpose. Descriptive analysis employing average score index was used for collected data. Findings: The results indicate severity of each factor toward the C and D waste generation and also the severity ranking. It was found that poor site management, lack of experience, rework, design errors and lack of environmental awareness are ranked as five most sever factors to C and D waste generation in Iraqi construction industry. Application/Improvements: Benefit from this study will be shared amongst researchers and also construction community to ensure the minimization of the (C and D) waste generation in Iraq.
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