Automatic generation of live loads

Up to now, Archicad zones functioned primarily to categorize spaces.

As of Archicad 26, zone data are translated into live load values. A new command generates live loads automatically, based on load categories which you have mapped to classifications. Whenever the model changes, you can easily update live loads with just one click.

With this feature, structural engineers can access detailed information directly from the physical model for faster model coordination and less manual input.

How it works

•Map your zones (via their Classification) to the appropriate Load Category

•Load Categories determine the live load values. Archicad comes with default Load Category definitions (based on EN1991-1-1:2002 - Eurocode 1: Actions on Structures - Part 1-1: General Actions), which you can customize as needed.

•In the Structural Analytical model: use Design > Structural Analytical Elements > Generate/Update Live Load

Which zones generate live loads?

•Live loads are generated for zones which meet the following conditions:

•Zone is classified (Zone Settings)

•Zone Classification is mapped to a Load Category (Load Mapping dialog)

•“Generate Live Loads” checkbox is activated (Zone Settings)

Check Load Categories

Open the dialog from Options > Load Categories

For each category, review and set live load values as needed, or create a new Load Category.

Note: The unit for the value (e.g. KN/m2) comes from the Surface Force setting at Project Preferences > Structural Load Units

Note 2: The default values provided are based on EN1991-1-1:2002 - Eurocode 1: Actions on Structures - Part 1-1: General Actions

Set up Load Mapping

Open Options > Load Mapping

Use this table to map Classifications (left column) to Load Categories.

You can map one or more zone classifications to any single Load Category: here, the “Meeting room” and “Office” classifications are mapped to a single Load Category.

Generate Live Loads command

1.Make sure the Structural Analytical Model is on.

2.Use Design > Structural Analytical Elements > Generate/Update Live Loads.

3.Check the resulting surface loads in 3D.

Update Live Loads

When the model changes, you can update live loads the same way:

Use Design > Structural Analytical Elements > Generate/Update Live Loads.

New live loads are created, updated or deleted as needed, to reflect changes in the model (e.g. zone geometry or classification).