Fixed Ladder Rung Width

The minimum clear width of rungs on fixed ladders shall be 16.

Fixed ladder rung width. Fixed ladders more than 20 feet 6 1 m in height shall be provided with a cage well or ladder safety device. First rung from the bottom can be up to 14 inches minimum clear width of rungs or cleats is 16 inches. The international mechanical code 2018 306 5 4 calls for a minimum of 18 between rails. As seen in the picture below featuring new ladder system we recommend a wider climbing surface to accommodate a ladder lifeline system and to make the ladder easier to climb.

All fixed ladders have rungs dictated by osha standard 1910 27 b 1 of no more than 12 300 mm on center measured as the distance from the centerline of a rung to the center line of the next rung and at 16 410 mm clear width. Rungs and cleats ladder minimum diameter 3 4 inch metal rungs. The distance between rungs cleats and steps does not exceed 12 inches and is uniform throughout the length of the ladder. There are exceptions for ladders in elevator shafts or on telecommunications towers.

For fixed ladders consisting of wood side rails and wood rungs or cleats used at a pitch in the range 75 degrees to 90 degrees and intended for use by no more than one person per section single ladders as described in 1910 25 c 3 ii are acceptable. Individual metal rungs embedded in concrete pits minimum 1 inch diameter. 1917 118 e 2 when a well or cage is used ladders with length of climb exceeding 30 feet 9 14 m shall comply with the following provisions.