To the general public a "barrier" may seem like a self explained term, (and therefore an "expandable barrier" is equally self explained). However, according to OSHA (Occupational Safety and Health Administration) there are many different barrier types which serve a wide variety of safety needs. For instance as you navigate the complex directory of OSHA regulations for your particular industry needs, you may come across terms like "awareness barrier", "traffic barrier", "warning lines", and more.

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