You can also drag structural steel parts
into your assembly from the Toolbox Browser. See Add a Part to an Assembly for more
information.Using the Structural Steel dialog box, you can bring the cross-section sketch of a structural steel beam into a part. The sketch is fully-dimensioned to match industry standard sizes. You can extrude the sketch in SolidWorks to create the beam.
You can also drag structural steel parts
into your assembly from the Toolbox Browser. See Add a Part to an Assembly for more
information.
To add a sketch of a structural steel beam to a part:
Make sure you are not currently editing a sketch, then select a plane or planar face in your part.
Click Structural Steel 
on the SolidWorks Toolbox toolbar, or click Toolbox,
Structural Steel.
The Structural Steel dialog box appears.
Select a standard, a beam type, and an available cross-section from the lists on the top left of the dialog box.
The fields in the Section Property and Value columns update.
Click Beam Calculator to use the Beam Calculator dialog box to help you determine which beam to select.
Click Send To
to send the
structural steel properties to a printer or a text file.
Click Create to add the sketch of the cross-section of the structural steel member to a part.
If you do not select a plane or planar
face in Step 1, the sketch appears on the Front
plane.
Click Done to close the dialog box.
To precisely locate the cross-section, right-click the new sketch, select Edit Sketch, and add dimensions or relations to position the sketch.