BS EN 131-6 pdf free download
BS EN 131-6-2019 pdf free download.Ladders Part 6: Telescopic ladders.
4 Functional dimensions
4.1 General dimensions
Dimensions are given in EN 131-1.
4.2 Specific dimensions
For leaning telescopic ladders dimension l 3 is not applicable providing l 6 ,see 4.3, is fulfilled. If l 6 is not fulfilled l 3 shall begreater than 0,5 l 5 and less than l 5 + 15 mm measured along a line in the middle of the stiles.
4.3 Top rung clearance l 6
The dimension l 6 is the horizontal clearance between the top rung and any obstruction (specifically the wall) when the ladder is in its position of use.
The dimension l 6 is the horizontal distance between the top rung and the wall when measured with the ladder in its position of use at any angle between 65° and 75° (see Figure 1). This shall not be less than
35 mm and not more than 300 mm. The minimum clearance between the top rung and any obstruction shall be 35 mm in any case.
4.4 Outside width b 4
The dimension b 4 is the outside width measured to the outside of the stiles at its widest part at the bottom of the ladder, see Figure 2.
5 Requirements
5.1 General requirements
The drawings in this part of EN 131 are examples only and products do not need to correspond.
However, dimensions are binding.
For other requirements EN 131-2:2010+A2:2017, Clause 4 applies.
5.2 Distance between rungs/steps
When the ladder is in its position of use the rungs/steps allowed to stand on shall always be equally spaced in accordance with EN 131-1:2015, 4.1.
In the position of use the construction shall not allow different distances between the rungs/steps with a tolerance of ±2 mm in the ascendable part of the ladder and ensure that the rung/step sections that are not extended shall be stacked at the top of the ladder. Manufacturer shall take all necessary precautions to prevent these distances been altered without manipulation and the use of tools.
5.3 Additional requirements for the top of leaning ladders The top of the ladder shall be designed in a way that a 2-point area of contact between the top of the ladder and a vertical plane can be ensured.
5.4 Locking of the rung/step sections The ladder shall be designed in way that all extended rung/step sections are locked when the ladder is in the position of use. Every rung/step section shall have a locking mechanism for each stile. With the ladder in position of use it shall be clearly visible to the user that all of the locking mechanisms are locked or unlocked. NOTE Visible indication can for example be a coloured area of a visible locking pin.
5.5 Design Screws and nuts shall be secured against loosening, for example by means of self-locking or mechanically locked safety mechanisms. It shall not be possible to separate rung/step sections without using tools. The unlocking and sliding in of the ladder shall be possible in a safe way. The ladder shall be designed in a way that squeezing between the rungs/steps is avoided when the ladder is used in accordance to the user instructions. Protection against squeezing can be ensured by a breaking function that reduces any impact load on the user’s hands when the ladder is collapsed according to the manufacturer’s instruction. If a permanent breaking function is used a typical time for collapsing a section of 300 mm is 1,5 s if the movement is uniform. If only a distance device is used for protection against squeezing between the rung/steps this device shall be located at least 80 mm from the manufacturers recommended position of the user’s hands during collapse of the ladder.BS EN 131-6 pdf download.
