If you're installing a metal fence, you might be wondering if you need to set the posts in concrete. The answer depends on the type of metal fencing you're using. For example, chain link fencing can be installed without concrete, while wrought iron fencing will need concrete for support. In general, metal fencing that is subject to high winds or other forces will need to be set in concrete. This will help to ensure that the fence stays in place and doesn't topple over. However, metal fencing that is less likely to be affected by wind or other forces can be installed without concrete. Ultimately, it's important to enquire with the manufacturer, or a professional, before installation to ensure that your fence is installed correctly.