The comparaton of costs by computure aded and nteractve greenhouse desgn applcaton

This study aimed to determine the cost of singular greenhouses in computer having ground area of 100 to 750 m2 by entering greenhouse size. Having determined the required amount of materials and total costs, different sizes of steel construction with gable roof greenhouses arc roof and gothic roof greenhouses were compared with each other. The cost of the greenhouse to be designed was computed using the greenhouse design application employing Delphi programming language. After entering the different options with this prepared design, the user can see required results of the basic calculation in the construction greenhouse. If necessary, the user can go back and design for different choices. This study can be used for educational purposes in addition to (also) the design of the greenhouse. With this practice, numerical examples and costs related to greenhouse can be controlled. In this study, the unit cost was determined by calculating the total cost of the greenhouse that will be designed in case of cultivation of four different plants type in different greenhouse size and covered with different materials in different type greenhouses. The offered options are chosen from required economic values for appropriate plant species and comfortable mechanization inside greenhouse. In computer, two different heights of basic type rectangular greenhouses,  three different widths and six different lengths options in gable roofed glass greenhouses can be selected for seedlings / saplings, vegetables and cut flowers for each plant species. Basic type rectangular greenhouses were designed with two different heights, four different widths and six different lengths options in gothic and arc roofed covered with plastic greenhouses. For banana plant in only one height option,  basic type rectangular greenhouses were designed with three different widths and six different lengths options in gable roofed glass greenhouses and four different widths and six different lengths options in gothic and arc roofed covered with plastic greenhouses. Then the different options were compared with each other by calculating the cost of designed greenhouses. With this study, the manufacturer select the greenhouse type and its cost according to the product he wants to grow by entering data which chosen by himself and will be able to see plan, section and view of chosen in the condition greenhouse.         Key words: Greenhouses, structural properties, construction, design, cost.