MicroMVDs for exchange requirements/Quantity take-off MicroMVD

The following MicroMVD vocabulary can be used to ensure that data is present for basic dimensional quantity take-off.

• Concrete material: "Concrete" in IfcMaterial.Category
• Concrete construction method: Pset_ConcreteElementGeneral.ConstructionMethod
• Strength class: Pset_ConcreteElementGeneral.StrengthClass
• Compressive strength: IfcMaterial.Pset_MaterialConcrete.CompressiveStrength

Feature: Quantity take-off

In order to cost elements
For cost planners
All elements need to have dimensional and cost-significant metadata assigned

Scenario: All concrete elements are named and contain data
 * All concrete elements must be assigned to a concrete material
 * All concrete elements must have their construction method assigned
 * All concrete elements must have their strength class assigned
 * All concrete materials must have their compressive strength assigned

Scenario: All concrete element data must be in a standardised form
 * All concrete elements must have their construction method assigned with one of the following values:
   | Value   |
   | In-situ |
   | Precast |
   | {value} |
 * All concrete elements must have their strength class assigned with one of the following values:
   | Value   |
   | N       |
   | S       |
   | {value} |
 * All concrete materials must have their compressive strength assigned with one of the following values:
   | Value     |
   | 20000000  |
   | 25000000  |
   | 32000000  |
   | 40000000  |
   | 50000000  |
   | 65000000  |
   | 80000000  |
   | 100000000 |
   | {value}   |

Scenario: All blockwork walls are identifiable
 * All blockwork walls must be assigned to a block material

Scenario: All partition walls are identifiable
 * All partition walls must be assigned to a partition material

Scenario: All walls must have dimensional quantities
 * All in-situ concrete walls must have a Length, Height, NetVolume, and GrossSideArea quantity
 * All precast concrete walls must have a Length, Width, Height, and GrossSideArea quantity
 * All blockwork walls must have a Length, Width, Height, and GrossSideArea quantity
 * All partition walls must have a Length, Width, Height, and GrossSideArea quantity
 * All other walls must have a Length, Width, Height, and GrossSideArea quantity

You can fill out the variables using the guide below.

Variable	Example	Description
{file}	project.ifc	The filename or path to any IFC file.
{schema}	IFC4	The schema version. At the moment, these are likely to be either IFC4 or IFC2X3.

Slabs

• In-situ concrete: Width, Length, Depth, Perimeter, GrossArea, GrossVolume
• Precast concrete: Width, Length, Depth, Perimeter, GrossArea, GrossVolume
• Other: GrossArea

Column

• Concrete: Length, OuterSurfaceArea, GrossVolume
• Steel: Length, OuterSurfaceArea, GrossVolume, GrossWeight
• Other: Length, OuterSurfaceArea, GrossVolume, GrossWeight

Beam

• Concrete: Length, GrossVolume
• Steel: Length, OuterSurfaceArea, GrossVolume, GrossWeight
• Other: Length, GrossVolume

Other

• Footings: Length, Width, Height, GrossSurfaceArea, GrossVolume
• Railings: Length
• Piles: Length, OuterSurfaceArea, GrossVolume, GrossWeight
• Openings: Width, Height, Depth, Area, Volume
• Stair flights: Length, GrossVolume
• Structural members: Length, OuterSurfaceArea, GrossVolume, GrossWeight
• Reinforcement bar: Length, Weight
• Reinforcement mesh: Length, Width, Weight
• Curtain wall panels: GrossArea
• Window: Area
• Duct segments: Length, OuterSurfaceArea, GrossWeight
• Pipe segments: Length, OuterSurfaceArea, GrossWeight

Steel

painting type:

- none
- architectural paint
- fire resistant painting

grade - 250 - 300 - 350 - 400 - 450

brick wall

finish: - none - render - paint

block walls

thickness: - 90 - 190 - 390

core filled: - none - 1.2m - full height

load bearing: - yes - no

stiffeners (if not modeled): - yes - no

reo bars: - yes - no

partition walls

plasterboard layer: - impact resistant (yes / no) - moisure resistant (yes / no) - fire rated (yes / no)

Pset_WallCommon.LoadBearing – True/False Pset_WallCommonAcousticRating – Rw / Rw + Ctr Pset_WallCommon.FireRating -/-/-