Spider calculates concrete volume for different parts of the structure. First, beams, columns, walls, and floors, consisting slabs and joists are constructed in true proportion in a 3D model. Then overlapping elements are excluded, and finally the net volume for each floor and element type is separately calculated.
In brief, Spider:

• Calculates concrete volume and weight of all elements such as beams, columns, walls, and slabs
• Presents the results separately for each floor and element type