crush barrier 
noun British
A barrier, especially a temporary one, for restraining a crowd.Introduced to the club by his auntie and uncle at the age of seven, he became a regular in the Celtic end, perched on a crush barrier behind the goal....
- Five police officers, with a double crush barrier in front of them stopped the parade when it made its token efforts to follow the traditional route.
- Not just the concrete treads and risers, but their dimensions, their form of construction, and not least, the very style of crush barrier upon which millions of football fans would lean over the ensuing decades.