• Revit

About parameters

Understand parameters and parameter types


00:04

Parameters are used to control the

00:06

dimensional and visual characteristics of each family

00:09

and are also used to store other types of

00:11

metadata such as materials specifications and identity data.

00:17

There are four types of parameters that could be used within rev

00:20

these are family parameters, shared parameters,

00:23

project parameters and global parameters.

00:26

However,

00:27

the two types of parameters used in most

00:29

structural families are family parameters and shared parameters.

00:35

Family parameters are used to control the

00:37

dimensional and visual aspects of a family.

00:40

They can also store values such as manufacturer data or perhaps

00:44

values to control marking and numbering of instances within your project.

00:49

You can create any number of family parameters to describe and define your family.

00:55

Shared parameters can be used in multiple families and additionally

00:59

can be scheduled tagged and exported to open database connectivity.

01:03

For example, we may require a classification code

01:07

to be used within a variety of

01:08

categories, families and elements.

01:12

It's important to understand that shared parameters rely on an

01:15

external text file and this should be carefully managed.

01:18

It is possible to have a parameter with the same name but a different

01:22

which is a global unique identifier.

01:25

This can cause problems in a project environment and lead to ambiguity.

01:30

Project parameters are defined directly in the project and not in a family.

01:35

A project parameter can be added to multiple categories simultaneously.

01:39

The project parameters can be used in schedules.

01:43

In the example shown here,

01:44

a new project parameter has been defined within the project

01:47

to highlight if a structured element is designed by others.

01:51

Notice that this parameter is a yes no

01:53

parameter and is applied to multiple categories.

01:56

Typically, these are quick and easy to set up and give maximum efficiency

02:02

like project parameters.

02:03

Global parameters are also defined in the project and not in the family.

02:08

A global parameter can be used to control many elements.

02:12

You can control dimensional values as well as parameters such as materials.

02:17

In the example shown here,

02:18

three global parameters have been set up to control the balcony dimensions and

02:23

also the grade of concrete used on a variety of different structural elements.

02:27

This is particularly useful when you need to make a global change

02:31

to the material or the dimensions that are controlled in that balcony.

02:36

All parameters can have a type applied which controls

02:39

the type of data that a parameter can store.

02:42

Some typical examples are shown below.

02:44

So you can see we have text

02:46

integer distance, a yes no parameter or a web address.

02:51

These are just a small selection of the parameter types that you have available.

02:55

Additionally,

02:56

you can create parameters that are specific to the structural

02:59

discipline such as linear force moments and section area.

Video transcript

00:04

Parameters are used to control the

00:06

dimensional and visual characteristics of each family

00:09

and are also used to store other types of

00:11

metadata such as materials specifications and identity data.

00:17

There are four types of parameters that could be used within rev

00:20

these are family parameters, shared parameters,

00:23

project parameters and global parameters.

00:26

However,

00:27

the two types of parameters used in most

00:29

structural families are family parameters and shared parameters.

00:35

Family parameters are used to control the

00:37

dimensional and visual aspects of a family.

00:40

They can also store values such as manufacturer data or perhaps

00:44

values to control marking and numbering of instances within your project.

00:49

You can create any number of family parameters to describe and define your family.

00:55

Shared parameters can be used in multiple families and additionally

00:59

can be scheduled tagged and exported to open database connectivity.

01:03

For example, we may require a classification code

01:07

to be used within a variety of

01:08

categories, families and elements.

01:12

It's important to understand that shared parameters rely on an

01:15

external text file and this should be carefully managed.

01:18

It is possible to have a parameter with the same name but a different

01:22

which is a global unique identifier.

01:25

This can cause problems in a project environment and lead to ambiguity.

01:30

Project parameters are defined directly in the project and not in a family.

01:35

A project parameter can be added to multiple categories simultaneously.

01:39

The project parameters can be used in schedules.

01:43

In the example shown here,

01:44

a new project parameter has been defined within the project

01:47

to highlight if a structured element is designed by others.

01:51

Notice that this parameter is a yes no

01:53

parameter and is applied to multiple categories.

01:56

Typically, these are quick and easy to set up and give maximum efficiency

02:02

like project parameters.

02:03

Global parameters are also defined in the project and not in the family.

02:08

A global parameter can be used to control many elements.

02:12

You can control dimensional values as well as parameters such as materials.

02:17

In the example shown here,

02:18

three global parameters have been set up to control the balcony dimensions and

02:23

also the grade of concrete used on a variety of different structural elements.

02:27

This is particularly useful when you need to make a global change

02:31

to the material or the dimensions that are controlled in that balcony.

02:36

All parameters can have a type applied which controls

02:39

the type of data that a parameter can store.

02:42

Some typical examples are shown below.

02:44

So you can see we have text

02:46

integer distance, a yes no parameter or a web address.

02:51

These are just a small selection of the parameter types that you have available.

02:55

Additionally,

02:56

you can create parameters that are specific to the structural

02:59

discipline such as linear force moments and section area.

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