-Railings shall be constructed of wood or in an equally substantial manner from other materials, and shall consist of the following:
a. A wooden top rail that is 42 inches to 45 inches high and that measures 2 inches x 4 inches or larger.
b. A mid-rail shall measure at least 1 inch x 6 inches and shall be placed halfway between the top rail and the floor when there is no wall or the parapet wall is less than 21 inches high.
c. Screens, mesh, intermediate vertical members, solid panels or equivalent members, may be used in lieu of a mid-rail subject to the following:
1. Screens and mesh shall extend from the top rail to the floor and along the entire opening between top rail supports.
2. The gap between the intermediate vertical members shall not be greater than 19 inches.
3. Other intermediate members such as solid panels shall not have gaps more than 19 inches.
d. Wood posts shall be not less than 2 inches by 4 inches in cross section, spaced at 8 feet or closer intervals.
Note: use only “Selected Lumber” — free from damage that affects its strength for wood railings. Steel banding and plastic banding shall not be used as top rails or mid-rails.
-All railings and components shall be capable of withstanding a force of at least 200 lbs. applied to the top rail within 2 inches of the top edge, in any outward or downward direction, at any point along the top edge
-Mid-rails, screens, mesh, intermediate vertical members, solid panels, and equivalent members shall be capable of withstanding a force of at least 150 lbs. applied in any downward or outward direction at any point
-The top rail or mid-rail on scaffolding platforms may be substituted by the X-braces (see the 'Scaffolds' isoBlog). 1644(a)(6)
-The ends of the rails shall not overhang the terminal posts, except where such overhang does not constitute a projection hazard. 1620(f)
-Railings shall be so surfaced as to prevent injury to an employee from punctures or lacerations and to prevent snagging of clothing. 1620(g)