How can I change / modify unit system?

 Applies To 
 Environment: N/A
 Area: Modeling Solutions
 Subarea: Geometry
 Original Author:Global Technical Support 

I cannot change unit system

Base unit system

There are two base unit systems in the program which control the units (i.e., length, force, temperature, etc.) in which, values, specifically results and other information presented in the tables and reports, are displayed in. The base unit system also dictates what type of default values the program will use when attributes such as Modulus of Elasticity, Density, etc., are assigned based on material types - Steel, Concrete, Aluminum - selected from the program's library (Please refer to Technical Reference of STAAD Commands for details). These two unit systems are:
  • English (Foot, Pound, etc.) and
  • Metric (KN, Meter, etc.)

    Tip: If you recall, one of the choices made at the time of installing STAAD.Pro is this base unit system setting. That choice will serve as the default until you specifically change it.

Selecting Different Input Units in Dialogs

While you may typically wish to work in one unit system - or even with a specific unit of force or length, it is not uncommon to use a different unit for input. STAAD.Pro allows for the input of a value in any unit in most dialog boxes. This avoids the need to manually change the unit before and after adding a command or to convert a unit to something less commonly used. A unit is entered in the most convenient format and then converted to the current units for you. This is especially useful when adding or editing loads, where the current input units cannot be changed.

To set the current input units

To change the current length and force units for inputs, use the following procedure.

The current input units used for creating the model and assigning attributes such as properties, offsets, loads, etc. can be changed to use convenient units.

On the Geometry ribbon tab, select the Input Units tool in the Structure group. The Set Input Units pop-up opens.

Select the base system of Input Units:
Select the base system of Input Units:

English, Metric and Custom (to mix different systems of units).

Select a unit for Length on the left and unit for Force on the right.
Click Apply.

A short video is attached.