Interior spaces

SPACE-INT

Links the room programme, area verification, and discipline planning so that use, sizing, and technical requirements can be coordinated for each space.

Description

Usable interior spaces modelled as continuous volumes.
Room use is carried in LongName; Name may carry the room number.

Modelling guidelines

Model as a volume with the space tool, storey by storey.
From top of finished floor to underside of the structural ceiling - not a suspended ceiling. This allows other trades to reuse the space, for example to assign building services to it.
No overlaps or duplicates.
Fill every void in the building with a space object.
For rental-area or energy-reference-area calculations, choose and agree one of three approaches in advance: create a separate disposable model used only for the evaluation, with the required space definitions; adjust the calculation using suitable factors; or knowingly accept the remaining inaccuracy.

Discussion point

For discipline planning, defining the space volume from the top of the structural floor slab to the underside of the structural slab above would be beneficial. This would allow installations within the floor build-up to be assigned unambiguously to the space. However, many authoring tools do not support this approach reliably, so it is not generally recommended here. FinishFloorHeight or FloorCoveringThickness could additionally document the level difference.

Attributes

Name	Description	Unit
Name	Unique technical room number for planning. It provides discipline designers with a stable ID for linking their data permanently to the space and identifying significant changes quickly. It should stay stable as long as: the room size does not change substantially (e.g. from 12 m² office to 25 m² open-plan office) the function does not change substantially (e.g. from office to meeting room) and the orientation does not change (e.g. from south to east facing) Do not use for signage - signage room numbers change often and belong in SignageRoomNumber.
PredefinedType	Marks the object as a space. Allowed values `SPACE` - space Note The also permitted values `INTERNAL` and `EXTERNAL` conflate space type and location and have been deprecated since IFC4.3_ADD2. Therefore, use `SPACE` now and specify interior or exterior status using IsExternal.
InteriorOrExteriorSpace	Marks the space as interior. Allowed values `INTERNAL` - interior space Note Additional IFC2x3 classification; interior status is specified across all versions using IsExternal.
LongName	Room use for interior spaces according to the brief. Allowed values See the Interior space name value list.
Reference Pset_SpaceCommon	Area class of the space according to SIA 416 or SIA D0165. Allowed values See the Space reference interior SIA 416 / D0165 value list, e.g. `HNF`, `NNF`, `VF` (SIA 416) or `HNF-1`, `NNF-7`, `VF-9` (D0165).
IsExternal Pset_SpaceCommon	Marks an interior space. Allowed values `FALSE` - interior space
NetPlannedArea Pset_SpaceCommon	Ordered target net area of the space.	m²
SignageRoomNumber ePset_Space	Room number for wayfinding signage (labelling, orientation). Separate from the technical planning room number (Name), because signage numbers often change and are therefore not stable identifiers for planning and operation.
FloorCovering Pset_SpaceCoveringRequirements	Interior floor covering type for early planning - as a space property only, without a modelled floor build-up. Allowed values See the Interior space floor covering type value list.
TotalHeatLoss Pset_SpaceThermalDesign	Heating load for each space at design conditions as the basis for sizing heat emission. Note Result of the heating-load calculation; provide the power in watts.	W
DesignAreaLoad ePset_SpaceRequirement	Agreed design area load for the usage agreement.	kN/m²
DesignPointLoad ePset_SpaceRequirement	Agreed design point load for the usage agreement.	kN
VibrationRequirements ePset_SpaceRequirement	Agreed vibration requirements for the usage agreement according to ISO vibration criteria and Vibration Criterion (VC) per IEST. Allowed values `ISO Workshop` - 800 µm/s (32'000 µin/s): workshops, coarse manufacturing areas, machine protection zones `ISO Office` - 400 µm/s (16'000 µin/s): offices, control rooms, general administrative areas `ISO Residential (Night)` - 200 µm/s (8'000 µin/s): residential areas (night), light PC workplaces, microscopes <40× `ISO Operating Theatre (OT)` - 100 µm/s (4'000 µin/s): baseline (Base Curve): operating theatres, general laboratories, microscopes up to 100× `VC-A` - Vibration Criterion A per IEST `VC-B` - Vibration Criterion B per IEST `VC-C` - Vibration Criterion C per IEST `VC-D` - Vibration Criterion D per IEST `VC-E` - Vibration Criterion E per IEST
DesignAreaLoadActual ePset_Space	Verified actual area load for comparison with the usage agreement.	kN/m²
DesignPointLoadActual ePset_Space	Verified actual point load for comparison with the usage agreement.	kN
VibrationRequirementsActual ePset_Space	Verified actual vibration class for comparison with the usage agreement according to ISO vibration criteria and Vibration Criterion (VC) per IEST. Allowed values `ISO Workshop` - 800 µm/s (32'000 µin/s): workshops, coarse manufacturing areas, machine protection zones `ISO Office` - 400 µm/s (16'000 µin/s): offices, control rooms, general administrative areas `ISO Residential (Night)` - 200 µm/s (8'000 µin/s): residential areas (night), light PC workplaces, microscopes <40× `ISO Operating Theatre (OT)` - 100 µm/s (4'000 µin/s): baseline (Base Curve): operating theatres, general laboratories, microscopes up to 100× `VC-A` - Vibration Criterion A per IEST `VC-B` - Vibration Criterion B per IEST `VC-C` - Vibration Criterion C per IEST `VC-D` - Vibration Criterion D per IEST `VC-E` - Vibration Criterion E per IEST
WinterTemperatureMin ePset_SpaceRequirement	Agreed minimum room temperature in winter.	°C
WinterTemperatureMax ePset_SpaceRequirement	Agreed maximum room temperature in winter.	°C
SummerTemperatureMin ePset_SpaceRequirement	Agreed minimum room temperature in summer.	°C
SummerTemperatureMax ePset_SpaceRequirement	Agreed maximum room temperature in summer.	°C
RelativeHumidityMin ePset_SpaceRequirement	Agreed minimum relative humidity in the space.	%
RelativeHumidityMax ePset_SpaceRequirement	Agreed maximum relative humidity in the space.	%
OutdoorAirFlowRate ePset_SpaceRequirement	Agreed outdoor airflow rate for the space.	m³/h
PeakOccupancy ePset_SpaceRequirement	Agreed maximum number of people present at the same time.	Personen
DailyOperatingHours ePset_SpaceRequirement	Agreed daily operating duration of the space.	h/Tag
RequiredIlluminance ePset_SpaceRequirement	Agreed average illuminance in the space.	lx
WinterTemperatureMinActual ePset_Space	Verified actual minimum room temperature in winter.	°C
WinterTemperatureMaxActual ePset_Space	Verified actual maximum room temperature in winter.	°C
SummerTemperatureMinActual ePset_Space	Verified actual minimum room temperature in summer.	°C
SummerTemperatureMaxActual ePset_Space	Verified actual maximum room temperature in summer.	°C
RelativeHumidityMinActual ePset_Space	Verified actual minimum relative humidity in the space.	%
RelativeHumidityMaxActual ePset_Space	Verified actual maximum relative humidity in the space.	%
OutdoorAirFlowRateActual ePset_Space	Verified actual outdoor airflow rate for the space.	m³/h
PeakOccupancyActual ePset_Space	Verified actual maximum number of people present at the same time.	Personen
DailyOperatingHoursActual ePset_Space	Verified actual daily operating duration of the space.	h/Tag
RequiredIlluminanceActual ePset_Space	Verified actual average illuminance in the space.	lx
Checkliste ePset_Space	Free-text description of fit-out work in the room including sequence - so contractors on site can see what needs to be done.
UsageUnitReference ePset_Space	Stable reference of the usage unit to which the space belongs, for example an apartment, office unit, or commercial unit. It should where possible be populated using an algorithm based on the space's geometric position within the corresponding gross volume. Note Alternatively, the spaces of a usage unit can be grouped using `IfcZone`.
FireCompartmentReference ePset_Space	Stable reference of the fire compartment to which the space belongs according to the fire-protection concept.
SecurityZoneReference ePset_Space	Stable reference of the security zone to which the space belongs according to the security concept.
SecurityLevel ePset_Space	Security level of the space according to the security concept. Allowed values `Public` `Internal` `Restricted` `High security`
ProtectionGoal ePset_Space	Protection goal of the space according to the security concept. Allowed values `Burglary` `Sabotage` `Espionage` `Vandalism`
NetFloorArea Qto_SpaceBaseQuantities	Net floor area of the modelled space.	m²
NetPerimeter Qto_SpaceBaseQuantities	Net perimeter length at floor level of the modelled space - excluding segments at virtual boundaries and openings; may include the perimeter of fixed fittings such as columns.	m
NetVolume Qto_SpaceBaseQuantities	Net volume of the modelled space.	m³
Height Qto_SpaceBaseQuantities	Height of the modelled space volume.	m
FinishCeilingHeight Qto_SpaceBaseQuantities	Suspended ceiling height - clear height from top of finished floor to underside of the suspended ceiling. Note For an uneven suspended ceiling, pick the worst case for use: the deepest underside (smallest clear height).	m
WallCovering Pset_SpaceCoveringRequirements	Wall finish quality for space-based tendering - without a separately modelled wall covering. Allowed values See the Wall surface quality value list.
GrossWallArea Qto_SpaceBaseQuantities	Gross area of the wall surfaces bounding the space before deducting openings.	m²
NetWallArea Qto_SpaceBaseQuantities	Net area of the wall surfaces bounding the space after deducting modelled openings.	m²
HandicapAccessible Pset_SpaceCommon	Marks whether the space is accessible and included in the coloured accessible route. Allowed values `TRUE` - accessible `FALSE` - not verified as accessible