1. Ergonomic considerations
The step spacing of the ladder should first be determined based on ergonomic principles. When going up and down stairs or using a ladder, the human body needs to maintain a relatively comfortable stride and posture. Generally speaking, the average stride of an adult is about 60 cm to 70 cm. However, considering the safety and stability when using a ladder, the step spacing cannot be completely equivalent to the stride of daily walking. The step spacing is usually set within a reasonable range so that the user's legs can stretch naturally when going up and down the ladder, and will not feel too cramped or too loose. This can not only reduce the user's fatigue, but also improve the comfort of use.
2. Safety standard requirements
The step spacing of the ladder should also refer to relevant safety standards. Different countries and regions may have different standard requirements, but the overall purpose is to ensure the safety of users. These standards usually take into account factors such as the use scenario and load-bearing capacity of the ladder. For example, the step spacing may be different for industrial ladders and household ladders. Industrial ladders may need to adapt to heavier work tasks and users of different body types, so the design of the step spacing may focus more on stability and durability. Home ladders may focus more on portability and comfort, and the step spacing will be relatively moderate.
3. Differences in usage scenarios
The usage scenario will also affect the determination of the step spacing of the ladder. If it is in the scenario of working at height, the step spacing of the ladder needs to be designed more carefully. Because when working at height, the user's psychological pressure is greater, and the stability and safety requirements of the ladder are higher. At this time, the step spacing may be relatively small to ensure that the user can stand and operate more stably. In some daily use scenarios at lower heights, the step spacing can be appropriately relaxed, but it should not be too loose to avoid the risk of users falling.
4. Actual testing and adjustment
In the process of determining the step spacing of the ladder, actual testing is a very important link. Manufacturers usually conduct a large number of actual tests, invite users of different body types to try it out, and collect their feedback. Based on these feedback, the step spacing is adjusted and optimized. At the same time, the expansion and contraction of the ladder material under different climatic conditions are also taken into account to ensure that the step spacing can remain stable and safe in various environments. Through continuous testing and adjustment, a ladder step spacing that is both ergonomic and meets safety standards is finally determined.
