common-situs picketingcom·mon-si·tus picketing
the picketing of an entire construction site by a union striking against a particular contractor or subcontractor working on only one section
also com·mon-site picketing
Picketing by unionized employees of a company at a site where another uninvolved company is also at the same location.
Origin of common-situs picketingLatin situs, site; see site.