One of the options on a type 3 barricade, or really any barricade for that matter, is feet. Why would someone buy type 3 barricades without feet? Well, there could be a number of reasons.
For one, it could be that they already have barricade feet from other barricades that are broken. Another reason could be that they are planning on mounting the barricade or permanently placing it somewhere. There are many options for type iii barricades, so always ask your dealer.