How to create a perforated sheet metal

1 1 Intermediate
could be that you want to use rectangular patern. by creating one hole and copying it over the surface of the sheet. i actually never use sheet metal parts but here it goes.

IronCAD - Using the Co-ordinate system to create a section

1 0 Intermediate
Use the Co-Ordinate systems to create a section plane. This is a handy alternative the section tool, as it does not cut the solid model.

IronCAD - Linked Cross Sections

0 0 Intermediate
Create independent parts all driven by the one linked cross section

IronCAD - Multifeature part from one Cross Section

0 0 Intermediate
Create a pipe section with flanges at each end, using one circle to drive the bore diameter with flange OD offset from this.