AD.2007-09.3.2 Concrete Design per ACI 318-08

The design of concrete members per the ACI code in STAAD.Pro has been updated to the 2008 edition of the code.

A new parameter, LWF, has been added to account for the lightweight concrete reduction factor, λ, in equations 11-3, 11-4, and 11-5 of the code.

To specify a design using ACI 318-08 in batch mode

Note: Design per the 2008 edition of the ACI code is currently only available in the batch mode.

Select the Design | Concrete page.

The Concrete Design - Whole Structure dialog opens.
In the Current Code list, select the ACI 318 2008.
Click Define Parameters list.

The Define Parameters dialog opens.
Specify one or more design parameters as necessary.
Click Add.

This will insert the following commands into the STAAD input file:
```
CODE ACI
```