Compose or design a wall or building point element
The description window of a building element in COCON-BIM is used to compose a wall or building element from materials (watch video).
The functional unit (FU) of a building element is systematically reduced as appropriate to :
- a surface area of 1 m² (wall, partition, roof, etc.)
- a length of 1 linear metre (lm) (beam, post, tube, etc.)
- a volume of 1 m3 (concrete block, etc.).
The description window of a building element consists (from top to bottom) of :
- the input/edit area for its name.
- the type of building element via :
- the "Wall" button (walls, partitions, slabs, floors, roofs, reveals, etc.)
- the "Point element" button (columns, beams, etc.) which is used to specify the shape (round, oval, square, rectangular, complex) and dimensions.
- the "Volume" button
- its main dynamic thermal characteristics calculated in accordance with standard EN 13786 :
- RSI (Internal surface thermal resistance).
- RSE (External surface thermal resistance).
- Dynamic thermal calculation period to be applied (1 day, 10 days, 30 days, one year).
- Interior thermal inertia
- Thermal phase displacement (in hours)
- Thermal damping (as %)
- a summary of the environmental parameters :
- Prescribed lifetime - expressed in number of years.
- Carbon tax (in €/m² or €/ml) applicable on the basis of the life cycle of the materials used.
- the "Composition" tab
- the "LCA" tab.
- the "Materials..." button which opens the "Materials library" window and allows materials to be dragged and dropped from it to compose the building element.
- the "Undo"/"Redo" buttons for the latest actions.
- the "Save" button which saves the building element in the library.
- the "Cancel" button which closes the window without saving any changes made.
- a "layer" or "point element" or "integrated point element" symbol editable by right clicking, which controls :
- thermal calculations. Thermal performance is determined by adding the thermal resistances of the layers.
- volume calculations. The real volumes are determined by adding those of the layers and point elements and by subtracting the volume from integrated ones.
- mass calculations. The weight of the materials takes account of their real volume and density.
- environmental calculations. The volumes and actual weight of the components are used to determine their impacts.
- the name of the material
- the unit in which the required quantity of the material is expressed using the following coding :
100 mm of insulation per m² of wall
Quantity per m²
1 m² of vapour barrier per m² of lining
3 ml of metal framing per m² of lining
0.025 m3 of wood per m² of roofing
Number of units
1 rain screen per m² of wall
Flow in mm
|3000x145x45 or 3,000 mm of frame uprights measuring 145 x 45 mm.|
- the year the material is used. This optional value is provided only in the case of a refurbishment and reduces the environmental impacts of the material concerned.
- the DVC - Corrected lifetime of the material. This optional value is filled in only where the default life of a material is not to be applied.
- (optional) rules for weighting impacts by life-cycle phase. These can be used to model the reuse of materials, particular transport distances, etc.
- a comment with free-text content. This optional value is entered :
- either semi-automatically when a wall is created, from the description of the building element already present in the digital model,
- or manually.
- thermal data :
- Thermal conductivity
- Thermal losses,
- Thermal resistance
- quantitative information :
- Volume (m3)
- Weight (kg)
- on the left is the data viewing area with vertical mini tabs
- Histogram : displays a horizontal bar histogram by impact indicator relating to the life-cycle analysis of each component of the building element. Right-click to export the selected graph to the clipboard or to an image file.
- Table : displays numerical values by impact indicator relating to the life-cycle analysis of each component of the building element. Right-click to export the data to the clipboard or to a csv file (compatible with Excel, Open Office, etc.).
- Radar : displays a radar diagram, each branch of which corresponds to an impact indicator. Right-click to export the selected graph to the clipboard or to an image file.
- on the right is displayed data selection area which controls :
- the lifetime (in years) for which the LCA is being carried out
- the list of impact indicators to be displayed (checkboxes) :
- Greenhouse gases (GHG)
- Destruction of the stratospheric ozone layer
- Photochemical ozone formation
- Total primary energy
- Renewable primary energy
- Non-renewable primary energy
- Primary process energy
- Primary energy material
- Water consumption
- Hazardous waste disposed of
- Non-hazardous waste disposed of
- Radioactive waste disposed of
- the life-cycle phases for which the impacts are shown (checkboxes) :
- Overall (see figure)
- Entire life cycle (standard NF P 01-010 and, where appropriate, standard EN 15804)
- Total available (simple sum of the phases checked and available).
- In semi-detail as per standard EN 15804 (see figure)
- A1-A3 : Production stage
- A4-A5 : Construction stage
- B1-B7 : Use stage
- C1-C4 : End-of-life stage
- D : Benefits beyond system boundaries
- In fine detail (standard EN 15804)
- A1 : Raw material supply
- A2 : Transport
- A3 : Manufacture
- A4 : Transport
- A5 : Use
- B1 : Use
- B2 : maintenance
- B3 : Repair
- B4 : Replacement
- B5 : Refurbishment
- B6 : Energy consumption while the building is in use
- B7 : Water consumption while the building is in use
- C1 : Demolition / dismantling
- C2 : Transport
- C3 : Waste transport
- C4 : Disposal
- D : Benefits beyond system boundaries