Quantity takeoff principles

Module(s): Rooms, Surfaces, Stories

Quantity takeoff operations using documents

You can define which documents or components are to be analyzed during quantity takeoff operations in the following ways:

• Selectively - by choosing specific documents and the objects they contain or
• Globally - based on several drawing files in the building structure (Derived from building structure area) or
• Globally - based on several drawing files assembled using a building list.

Quantity takeoff operations using the building structure

Using the building structure, you can quickly and easily generate reports encompassing entire structures or buildings. You only need to assign the source drawing files for the reports once in the Derived from building structure area. Allplan saves this assignment. You can quickly update the reports to reflect any changes you make. So you longer need to give any thought to which drawing files are required.

Quantity takeoff operations using building lists

Allplan offers an alternative approach for generating quantity takeoff reports encompassing entire structures or buildings: Start by structuring a project's drawing files in a "building list". You can use the following structural levels to assist you: "Structure", "Building" and "Story".

To obtain a quantities report, select individual drawing files or entire levels in the hierarchy that are to be taken into account. For this, the drawing files in question simply have to be selected in the project structure (you do not have to set them to current or edit mode).

Quantity takeoff operations work on a cross-file basis (i.e., you are not restricted to the information in a single document).

• Rooms and the corresponding walls with windows and doors do not have to be in the same drawing file. The system will nevertheless recognize door and window openings as belonging to the room and take these into account during calculations.

Neighbor relationships are taken into account:

• Doors and windows are assigned to the corresponding room (e.g., Rooms, surfaces, stories folder - Rooms - Room schedule.rdlc report). In this manner, the window area per room can be determined as a factor of the floor area (Rooms, surfaces, stories folder - Rooms - Proportionate window area.rdlc report).
• Door openings are assigned to rooms (depending on the direction of swing/opening). The floor covering in the door opening in the adjacent room is included in the calculation (e.g., Finish folder - Finishing surfaces - Finish floors.rdlc report).
• Slab recesses and openings are recognized as such (e.g., Finish folder - Finishing surfaces - Finish ceilings.rdlc report).
• Walls recognize each other (e.g., Trades folder - Concreting work - Formwork - walls, columns, flush piers.rdlc report).
• Floor and vertical surfaces take special surfaces into account:
  Special surfaces (user-defined floors or vertical surfaces) have a higher priority than ‘normal’ surfaces (e.g., a finish specification defined when entering the room) and will ‘cut’ through them.
• You can use the Reports tool to list and print architectural elements.

Note: For quantity takeoff operations that are compliant with German building regulations, you need to make sure that the openings are within the components.