View source for Converting IFC to gbXML

//* Note to Editors: Just putting resources here to reference when eventually creating this page:*//

The [https://github.com/brunopostle/IFC-to-gbXML-converter IFC to gbXML converter] tool (python scripts) supports IFC2x3 and IFC4 in SI units.

* [https://community.osarch.org/discussion/comment/18046#Comment_18046 OSArch Forum post] on IFC to gbXML conversion.

= Required data in IFC file for Conversion =
* Each Site '''should''' have location attributes, ie. ''RefLatitude'', ''RefLongitude'', ''RefElevation'' and ''SiteAddress''. ''RefLatitude'' '''must''' be correct.
* Each ''Building'' '''should''' have a ''BuildingAddress''.
* ''Spatial Elements'' '''must''' be structured correctly, ie. a ''Space'' '''must''' be contained within a ''Building Storey'', which '''must''' be contained within a ''Building'', which '''must''' be contained within a ''Site''.
* Each ''Space'' '''should''' have ''Qto_SpaceBaseQuantities/NetFloorArea'' and ''Qto_SpaceBaseQuantities/NetVolume'' quantities.
* Each ''Space'' '''must''' be bounded by ''2nd Level Space Boundary'' relationships.
* Each ''Space Boundary'' '''must''' have a ''Related Building Element'', planar ''Connection Geometry'', and an ''Internal Or External Boundary'' attribute.
* Each ''Window'' and ''Door'' (or its Type) '''must''' have a U-value property in ''Pset_WindowCommon/ThermalTransmittance'' or ''Pset_DoorCommon/ThermalTransmittance''.
* Each ''Window'' and ''Door'' (or its Type) '''should''' have a transmittance property in ''Pset_WindowCommon/GlazingAreaFraction'' or ''Pset_DoorCommon/GlazingAreaFraction''.
* Each ''Building Element'' (or its Type) with a solid construction '''must''' have a U-value property (eg. ''Pset_WallCommon/ThermalTransmittance'') '''or''' be constructed from a ''Material Layer Set'' with full thermal properties.
* Each ''Material Layer'' in a ''Material Layer Set'' construction '''must''' have a ''Thickness'' attribute, and each ''Material'' in a ''Material Layer'' '''must''' have an R-value property in ''Pset_MaterialEnergy/ThermalConductivityTemperatureDerivative''.
* For metric projects, units for U-Values '''must''' be W/m²·K, and R-values '''must''' be m²·K/W. For imperial projects (ie. where the LENGTHUNIT is feet or inches), U-value units '''must''' be Btu/h·ft²·F, and R-values '''must''' be h·ft²·F/Btu.

= See Also =
* [[OpenStudio]]
* [[Building Energy Modeling (BEM)]]