The type of physical quantity to be measured, for example length or force.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 17.0.0.0 (17.0.1090.0)
Syntax
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Members
| Member name | Description |
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| UT_Undefined | Undefined unit value |
| UT_Custom | A custom unit value |
| UT_Length | Length, e.g. ft, in, m, mm |
| UT_Area | Area, e.g. ft², in², m², mm² |
| UT_Volume | Volume, e.g. ft³, in³, m³, mm³ |
| UT_Angle | Angular measurement, e.g. radians, degrees |
| UT_Number | General format unit, appropriate for general counts or percentages |
| UT_SheetLength | Sheet length |
| UT_SiteAngle | Site angle |
| UT_HVAC_Density | Density (HVAC) e.g. kg/m³ |
| UT_HVAC_Energy | Energy (HVAC) e.g. (m² · kg)/s², J |
| UT_HVAC_Friction | Friction (HVAC) e.g. kg/(m² · s²), Pa/m |
| UT_HVAC_Power | Power (HVAC) e.g. (m² · kg)/s³, W |
| UT_HVAC_Power_Density | Power Density (HVAC), e.g. kg/s³, W/m² |
| UT_HVAC_Pressure | Pressure (HVAC) e.g. kg/(m · s²), Pa |
| UT_HVAC_Temperature | Temperature (HVAC) e.g. K, C, F |
| UT_HVAC_Velocity | Velocity (HVAC) e.g. m/s |
| UT_HVAC_Airflow | Air Flow (HVAC) e.g. m³/s |
| UT_HVAC_DuctSize | Duct Size (HVAC) e.g. mm, in |
| UT_HVAC_CrossSection | Cross Section (HVAC) e.g. mm², in² |
| UT_HVAC_HeatGain | Heat Gain (HVAC) e.g. (m² · kg)/s³, W |
| UT_Electrical_Current | Current (Electrical) e.g. A |
| UT_Electrical_Potential | Electrical Potential e.g. (m² · kg) / (s³· A), V |
| UT_Electrical_Frequency | Frequency (Electrical) e.g. 1/s, Hz |
| UT_Electrical_Illuminance | Illuminance (Electrical) e.g. (cd · sr)/m², lm/m² |
| UT_Electrical_Luminous_Flux | Luminous Flux (Electrical) e.g. cd · sr, lm |
| UT_Electrical_Power | Power (Electrical) e.g. (m² · kg)/s³, W |
| UT_HVAC_Roughness | Roughness factor (HVAC) e,g. ft, in, mm |
| UT_Force | Force, e.g. (kg · m)/s², N |
| UT_LinearForce | Force per unit length, e.g. kg/s², N/m |
| UT_AreaForce | Force per unit area, e.g. kg/(m · s²), N/m² |
| UT_Moment | Moment, e.g. (kg · m²)/s², N · m |
| UT_ForceScale | Force scale, e.g. m / N |
| UT_LinearForceScale | Linear force scale, e.g. m² / N |
| UT_AreaForceScale | Area force scale, e.g. m³ / N |
| UT_MomentScale | Moment scale, e.g. 1 / N |
| UT_Electrical_Apparent_Power | Apparent Power (Electrical), e.g. (m² · kg)/s³, W |
| UT_Electrical_Power_Density | Power Density (Electrical), e.g. kg/s³, W/m² |
| UT_Piping_Density | Density (Piping) e.g. kg/m³ |
| UT_Piping_Flow | Flow (Piping), e.g. m³/s |
| UT_Piping_Friction | Friction (Piping), e.g. kg/(m² · s²), Pa/m |
| UT_Piping_Pressure | Pressure (Piping), e.g. kg/(m · s²), Pa |
| UT_Piping_Temperature | Temperature (Piping), e.g. K |
| UT_Piping_Velocity | Velocity (Piping), e.g. m/s |
| UT_Piping_Viscosity | Dynamic Viscosity (Piping), e.g. kg/(m · s), Pa · s |
| UT_PipeSize | Pipe Size (Piping), e.g. m |
| UT_Piping_Roughness | Roughness factor (Piping), e.g. ft, in, mm |
| UT_Stress | Stress, e.g. kg/(m · s²), ksi, MPa |
| UT_UnitWeight | Unit weight, e.g. N/m³ |
| UT_ThermalExpansion | Thermal expansion, e.g. 1/K |
| UT_LinearMoment | Linear moment, e,g. (N · m)/m, lbf / ft |
| UT_LinearMomentScale | Linear moment scale, e.g. ft/kip, m/kN |
| UT_ForcePerLength | Point Spring Coefficient, e.g. kg/s², N/m |
| UT_ForceLengthPerAngle | Rotational Point Spring Coefficient, e.g. (kg · m²)/(s² · rad), (N · m)/rad |
| UT_LinearForcePerLength | Line Spring Coefficient, e.g. kg/(m · s²), (N · m)/m² |
| UT_LinearForceLengthPerAngle | Rotational Line Spring Coefficient, e.g. (kg · m)/(s² · rad), N/rad |
| UT_AreaForcePerLength | Area Spring Coefficient, e.g. kg/(m² · s²), N/m³ |
| UT_Piping_Volume | Pipe Volume, e.g. gallons, liters |
| UT_HVAC_Viscosity | Dynamic Viscosity (HVAC), e.g. kg/(m · s), Pa · s |
| UT_HVAC_CoefficientOfHeatTransfer | Coefficient of Heat Transfer (U-value) (HVAC), e.g. kg/(s³ · K), W/(m² · K) |
| UT_HVAC_Airflow_Density | Air Flow Density (HVAC), m³/(s · m²) |
| UT_Slope | Slope, rise/run |
| UT_HVAC_Cooling_Load | Cooling load (HVAC), e.g. (m² · kg)/s³, W, kW, Btu/s, Btu/h |
| UT_HVAC_Cooling_Load_Divided_By_Area | Cooling load per unit area (HVAC), e.g. kg/s³, W/m², W/ft², Btu/(h·ft²) |
| UT_HVAC_Cooling_Load_Divided_By_Volume | Cooling load per unit volume (HVAC), e.g. kg/(s³ · m), W/m³, Btu/(h·ft³) |
| UT_HVAC_Heating_Load | Heating load (HVAC), e.g. (m² · kg)/s³, W, kW, Btu/s, Btu/h |
| UT_HVAC_Heating_Load_Divided_By_Area | Heating load per unit area (HVAC), e.g. kg/s³, W/m², W/ft², Btu/(h·ft²) |
| UT_HVAC_Heating_Load_Divided_By_Volume | Heating load per unit volume (HVAC), e.g. kg/(s³ · m), W/m³, Btu/(h·ft³) |
| UT_HVAC_Airflow_Divided_By_Volume | Airflow per unit volume (HVAC), e.g. m³/(s · m³), CFM/ft³, CFM/CF, L/(s·m³) |
| UT_HVAC_Airflow_Divided_By_Cooling_Load | Airflow per unit cooling load (HVAC), e.g. (m · s²)/kg, ft²/ton, SF/ton, m²/kW |
| UT_HVAC_Area_Divided_By_Cooling_Load | Area per unit cooling load (HVAC), e.g. s³/kg, ft²/ton, m²/kW |
| UT_WireSize | Wire Size (Electrical), e.g. mm, inch |
| UT_HVAC_Slope | Slope (HVAC) |
| UT_Piping_Slope | Slope (Piping) |
| UT_Currency | Currency |
| UT_Electrical_Efficacy | Electrical efficacy (lighting), e.g. cd·sr·s³/(m²·kg), lm/W |
| UT_Electrical_Wattage | Wattage (lighting), e.g. (m² · kg)/s³, W |
| UT_Color_Temperature | Color temperature (lighting), e.g. K |
| UT_DecSheetLength | Sheet length in decimal form, decimal inches, mm |
| UT_Electrical_Luminous_Intensity | Luminous Intensity (Lighting), e.g. cd, cd |
| UT_Electrical_Luminance | Luminance (Lighting), cd/m², cd/m² |
| UT_HVAC_Area_Divided_By_Heating_Load | Area per unit heating load (HVAC), e.g. s³/kg, ft²/ton, m²/kW |
| UT_HVAC_Factor | Heating and coooling factor, percentage |
| UT_Electrical_Temperature | Temperature (electrical), e.g. F, C |
| UT_Electrical_CableTraySize | Cable tray size (electrical), e.g. in, mm |
| UT_Electrical_ConduitSize | Conduit size (electrical), e.g. in, mm |
| UT_Reinforcement_Volume | Structural reinforcement volume, e.g. in³, cm³ |
| UT_Reinforcement_Length | Structural reinforcement length, e.g. mm, in, ft |
| UT_Electrical_Demand_Factor | Electrical demand factor, percentage |
| UT_HVAC_DuctInsulationThickness | Duct Insulation Thickness (HVAC), e.g. mm, in |
| UT_HVAC_DuctLiningThickness | Duct Lining Thickness (HVAC), e.g. mm, in |
| UT_PipeInsulationThickness | Pipe Insulation Thickness (Piping), e.g. mm, in |
| UT_HVAC_ThermalResistance | Thermal Resistance (HVAC), R Value, e.g. m²·K/W |
| UT_HVAC_ThermalMass | Thermal Mass (HVAC), e.g. J/K, BTU/F |
| UT_Acceleration | Acceleration, e.g. m/s², km/s², in/s², ft/s², mi/s² |
| UT_Bar_Diameter | Bar Diameter, e.g. ', LF, ", m, cm, mm |
| UT_Crack_Width | Crack Width, e.g. ', LF, ", m, cm, mm |
| UT_Displacement_Deflection | Displacement/Deflection, e.g. ', LF, ", m, cm, mm |
| UT_Energy | Energy, e.g. J, kJ, kgf-m, lb-ft, N-m |
| UT_Structural_Frequency | FREQUENCY, Frequency (Structural) e.g. Hz |
| UT_Mass | Mass, e.g. kg, lb, t |
| UT_Mass_per_Unit_Length | Mass per Unit Length, e.g. kg/m, lb/ft |
| UT_Moment_of_Inertia | Moment of Inertia, e.g. ft^4, in^4, mm^4, cm^4, m^4 |
| UT_Surface_Area | Surface Area, e.g. ft²/ft, m²/m |
| UT_Period | Period, e.g. ms, s, min, h |
| UT_Pulsation | Pulsation, e.g. rad/s |
| UT_Reinforcement_Area | Reinforcement Area, e.g. SF, ft², in², mm², cm², m² |
| UT_Reinforcement_Area_per_Unit_Length | Reinforcement Area per Unit Length, e.g. ft²/ft, in²/ft, mm²/m, cm²/m, m²/m |
| UT_Reinforcement_Cover | Reinforcement Cover, e.g. ', LF, ", m, cm, mm |
| UT_Reinforcement_Spacing | Reinforcement Spacing, e.g. ', LF, ", m, cm, mm |
| UT_Rotation | Rotation, e.g. °, rad, grad |
| UT_Section_Area | Section Area, e.g. ft²/ft, in²/ft, mm²/m, cm²/m, m²/m |
| UT_Section_Dimension | Section Dimension, e.g. ', LF, ", m, cm, mm |
| UT_Section_Modulus | Section Modulus, e.g. ft^3, in^3, mm^3, cm^3, m^3 |
| UT_Section_Property | Section Property, e.g. ', LF, ", m, cm, mm |
| UT_Structural_Velocity | Section Property, e.g. km/h, m/s, ft/min, ft/s, mph |
| UT_Warping_Constant | Warping Constant, e.g. ft^6, in^6, mm^6, cm^6, m^6 |
| UT_Weight | Weight, e.g. N, daN, kN, MN, kip, kgf, Tf, lb, lbf |
| UT_Weight_per_Unit_Length | Weight per Unit Length, e.g. N/m, daN/m, kN/m, MN/m, kip/ft, kgf/m, Tf/m, lb/ft, lbf/ft, kip/in |
| UT_HVAC_ThermalConductivity | Thermal Conductivity (HVAC), e.g. W/(m·K) |
| UT_HVAC_SpecificHeat | Specific Heat (HVAC), e.g. J/(g·°C) |
| UT_HVAC_SpecificHeatOfVaporization | Specific Heat of Vaporization, e.g. J/g |
| UT_HVAC_Permeability | Permeability, e.g. ng/(Pa·s·m²) |
| UT_Electrical_Resistivity | Electrical Resistivity, e.g. |
| UT_MassDensity | Mass Density, e.g. kg/m³, lb/ft³ |
| UT_MassPerUnitArea | Mass Per Unit Area, e.g. kg/m², lb/ft² |
| UT_Pipe_Dimension | Length unit for pipe dimension, e.g. in, mm |
| UT_PipeMass | Mass, e.g. kg, lb, t |
| UT_PipeMassPerUnitLength | Mass per Unit Length, e.g. kg/m, lb/ft |
| UT_HVAC_TemperatureDifference | Temperature Difference (HVAC) e.g. C, F, K, R |
| UT_Piping_TemperatureDifference | Temperature Difference (Piping), e.g. C, F, K, R |
| UT_Electrical_TemperatureDifference | Temperature Difference (Electrical), e.g. C, F, K, R |
Remarks
Some unit types represent fundamental physical quantities to be measured, for example UT_Length, UT_Area, UT_Mass, or UT_Force.
Other unit types exist to provide an alternate set of unit settings for a physical quantity. For example, UT_HVAC_DuctSize is used for measuring sizes of ducts, UT_PipeSize is used for measuring sizes of pipes, and UT_SheetLength is used for measuring distances on a piece of paper. All of those are lengths and could use UT_Length, but they are typically measured using different units or to a different degree of accuracy compared with typical lengths in a building. By using different unit types, the Units class can have different default settings for measuring values of the same physical quantity.