Guard rails, toe boards and various other similar obstacles must be given to avoid a person or any kind of product or things falling from a workplace. https://h5uoqd6cfm6iolzmub2ttlezogf3ix2l2ispuwxxeenb3ouwejea.cdn.ampproject.org/c/s/writeablog.net%2Fclausriver1%2Fopening-vertical-possible-with-scaffold-towers