Amend Section 1644 to read:
§1644. Metal Scaffolds.
(1) Metal scaffolds shall be designed to support all dead, live, and wind loads to which they will be subjected.
(6) Securely attached railings as provided by the scaffold manufacturer, or other material equivalent in strength to the standard 2- by 4-inch wood railing made from "selected lumber" (see definition), shall be installed on open sides and ends of work platforms 7 1/2 feet or more above grade. The top rail shall be located at a height of not less than 42 inches nor more than 45 inches measured from the upper surface of the top rail to the platform level. A midrail shall be provided approximately halfway between the top rail and the platform.
NOTE: Toeboards or side screens may also be required. (See Section 1621.)
(A) "X" bracing is acceptable as a toprail if the intersection of the "X" occurs at 45 inches (plus or minus 3 inches) above the work platform, provided a horizontal rail is installed as a midrail between 19 and 25 inches above the work platform. The maximum vertical distance between the "X" brace members at the uprights shall not exceed 48 inches.
(B) "X" bracing is acceptable as a midrail if the intersection of the "X" falls between 20 inches and 36 inches above the work platform.
(1) Railings are not required on that side of bricklayers' and masons' scaffold adjacent to the work under construction provided the wall is higher than the adjacent work platform.
(2) For end rail openings less than 3 feet, double wrapped iron wire at least No. 12 gauge in thickness, or wire rope at least ¼ inch minimum diameter is permitted, provided the wire or wire rope is securely fastened.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.