This Book explains the criteria and factors for mechanical plants and equipments selection in construction projects. Manpower in building and construction projects is no longer enough, especially when we look at the sophisticated and complex structures that nowadays require increase in labour and work force. The increase in cost of labour, wants for urgency in construction and target completion periods, have called for the employment of mechanical plants to enhance human performance. Hence, various methods of minimizing loss and maximizing profit on the use of machines in construction projects have been dealt with more succinctly in order to achieve qualitative jobs at reduced cost within a reasonable time frame. The main thrust in the employment of plants’ services solely rest on careful consideration, utilization and effective use of certain criteria and factors in purchasing, hiring or leasing operations. This book is therefore a technical companion for professionals and students in Architecture, Building and Civil Engineering and Quantity Surveying, including building contractors and authorities dealing with the supervision and execution of construction projects.