IFC 4.3.0.1 (IFC4X3) development

7.10.2.1 IfcActionSourceTypeEnum

7.10.2.1.1 Semantic definition

This enumeration type contains possible action sources.

7.10.2.1.2 Type values

Type Description
BRAKES

Brakes

BUOYANCY

Buoyancy.

COMPLETION_G1

Completion.

CREEP

Forces due to creep.

CURRENT

Current.

DEAD_LOAD_G

The structure carries the dead load, which includes its own weight, the weight of any permanent non-structural partitions, built-in cupboards, floor surfacing materials and other finishes.

EARTHQUAKE_E

Earthquake loads affect the design of structures in areas of great seismic activity.

ERECTION

Loads on the facility that occur during erection, but not after completion.

FIRE

Fire action on the build facility.

ICE

Loads from ice.

IMPACT

Impact force from an object hitting the facility.

IMPULSE

Load from impulse force.

LACK_OF_FIT

Lack of fit.

LIVE_LOAD_Q

All the movable objects in a building such as people, desks, cupboards and filing cabinets produce an imposed load on the structure. This loading may come and go with the result that its intensity will vary considerably. At one moment a room may be empty, yet at another packed with people.

PRESTRESSING_P

Presstressing load.

PROPPING

Propping

RAIN

Rain and water on the structure.

SETTLEMENT_U

If one part of a building settles more than another part, then stresses are set up in the structures.

SHRINKAGE

Loads from shrinkage.

SNOW_S

The magnitude of the snow load will depend upon the latitude and altitude of the site. In the lower latitudes no snow would be expected while in the high latitudes snow could last for six months or more.

SYSTEM_IMPERFECTION

Loads from imperfections in the system.

TEMPERATURE_T

All building materials expand or contract with temperature change. Long continuous buildings will expand, and it is necessary to consider the expansion stresses.

TRANSPORT

Loads from transport.

WAVE

Loads from a wave hitting the structure.

WIND_W

The wind acts both on the main structure and on the individual cladding units. The structure has to be braced to resist the horizontal load and anchored to the ground to prevent the whole building from being blown away, if the dead weight of the building is not sufficient to hold it down.

USERDEFINED

User defined. See objectType for user defined type.

NOTDEFINED

Not defined.

Table 7.10.2.1.A

7.10.2.1.3 Formal representation

TYPE IfcActionSourceTypeEnum = ENUMERATION OF
	(BRAKES
	,BUOYANCY
	,COMPLETION_G1
	,CREEP
	,CURRENT
	,DEAD_LOAD_G
	,EARTHQUAKE_E
	,ERECTION
	,FIRE
	,ICE
	,IMPACT
	,IMPULSE
	,LACK_OF_FIT
	,LIVE_LOAD_Q
	,PRESTRESSING_P
	,PROPPING
	,RAIN
	,SETTLEMENT_U
	,SHRINKAGE
	,SNOW_S
	,SYSTEM_IMPERFECTION
	,TEMPERATURE_T
	,TRANSPORT
	,WAVE
	,WIND_W
	,USERDEFINED
	,NOTDEFINED);
END_TYPE;

7.10.2.1.4 References

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