Steel Designer is an add-in module for Multiframe that is used for checking or designing a steel frame in accordance with various codes of practice. After analysing a frame in Multiframe you can use Steel Designer to check the members in the structure for compliance with a design code. You can also use Steel Designer to choose the lightest weight sections, which satisfy the design criteria.
A word of caution:
Steel Designer is a very useful aid to the design of steel structures. It is NOT an automatic design tool and it should be used in conjunction with professional engineering judgment to produce well-designed frames.