53 Pa. Stat. § 4202
If any scaffolding or staging, swung or suspended from an overhead support or supports, shall be more than ten feet from the ground or floor, the same shall be deemed unsuitable and improper, and as not giving proper protection to the life and limb of any person employed or engaged thereon, unless such scaffolding or staging shall, when the same is in use, have a safety-rail, rising at least thirty-four inches above the floor or main portion of such scaffolding or staging, and extending along the outside thereof the entire length of the outside thereof, properly attached thereto, and unless such scaffolding or staging shall be provided with braces so as to sustain the weight of a man's body leaning against it, and prevent the scaffolding or staging from swaying from the building or structure.
53 P.S. § 4202