Tekla XSteel, is a 3D structural modeling system for detailing structural and miscellaneous steel. By using Tekla Xsteel the detailer creates a complete model of the steel structure including all the relevant information required for fabrication and erection. The model includes the structure’s geometry, dimensions, member properties, connection types and materials. All drawings, material lists and bolt lists are produced automatically from the model together with data for CNC machines. The model of the structure is created by the detailer who specifies the layout of the structural elements and associated connections. All elements within the product model - beams, columns, plates and bolts are intelligent objects. For example, when the size of the beam is altered, dimensions of adjoining connections change accordingly. If the height of the building is altered, Tekla Structures will generate updated drawings and material lists.