Patent ID: 6996503

Claim:
A system for the take-off of the materials using a two-dimensional CAD interface, in a computer terminal having a CAD system for creating a variety of design items for architecture, civil engineering, machinery, and facilities in a CAD drawing, comprising: project information containing means for containing project information including position data, design specifications, and shape data for a variety of design items; material/cost containing means for containing material information and cost information for building elements included in a CAD drawing in which a variety of design items for a project are stated; and bill-of-material take-off processing means for the take-off of the materials cost for an object by analyzing position information, shape information, and material information for building elements included in the CAD drawing created by the CAD system with reference to the project information of the project information containing means and the material information and cost information of the material/cost containing means, wherein the bill-of-material take-off processing means comprises: a device for extracting position information by extracting a room code having a name and a position code for building elements for each building, floor, and room of the CAD drawing and correcting and supplementing an entity of the CAD drawing with reference to the project information of the project information containing means; a device for extracting shave information for building elements for each building, floor, and room having a given position information; wherein the device for extracting shape information extracts shape information for forming a closed curve with center on a reference line intersected by objects having a given room code by analyzing line data, surface data, and portion data for building elements for each building, floor, and room included in the CAD drawing, a device for selecting a composite material code of the material/cost containing means and linking the same with materials included in each building element; and a device for the take-off of the materials and cost, wherein the device for selecting a composite material code and linking the same links the position and shape of an object as a single information by transferring the handle value of a polyline entity of the closed curve from room name code entity data to extended data.