How high is the household ladder suitable?
There are three-step, four-step and five-step ladders on the market now. Choose a ladder of suitable height as required.
The height of the three steps is about 70 cm, so it is usually impossible to reach the roof by stepping on the top floor, and it is only suitable for general operations such as taking things from the top of the cabinet and cleaning the glass. The height of the four steps is about 1 m. When you step on the highest step, your fingers can just touch the top of the floor, which is suitable for hanging curtains and other high-level jobs. The height of the five steps is about1.2m.. When stepping on the highest step, the top of the head can often be flush with the roof, which is suitable for lamps installation and other operations.
Here we need to mention the highest standing height of the ladder first. This refers to the maximum height that the ladder can stand under the condition of ensuring safety. For example, the highest standing position of a single/double-sided ladder is the second pedal with the top cover down. People are not allowed to stand on the top cover and the first step under the top cover of a single/double-sided ladder, because they are likely to lose their balance and fall. The highest standing position of the telescopic ladder is the fourth pedal from top to bottom. When the telescopic ladder is erected, it must be 2. 13~3.05 higher than the highest support or contact point (possibly the wall or roof line), so that it has enough length to complete the correct erection and lap joint of the pedal. It is forbidden to stand on the pedal of the telescopic ladder higher than the support point or the roof line.
Let's talk about the choice of ladder height. If a person's height is 1.68m, he can reach an object with a height of 2.44m when standing on a single/double-sided ladder with a height of 1. 17m. If it is a single/double-sided ladder with a height of 1.76m, he can reach an object with a height of 3.
For the telescopic ladder, the maximum contact height is 4.57m when standing on a 4.88m-high telescopic ladder ... and 5.79m when standing on a 6. 10m-high telescopic ladder. By analogy, the maximum contact height of a 7.32m-high telescopic ladder is 7.0 1m, and that of an 8.23m-high telescopic ladder is 7.01m.. The maximum contact height of a telescopic ladder with a height of 9.75m is 8.23m..9.45m 10.97m, and the maximum contact height of a telescopic ladder with a height of10.36m. 12. 19m is1/kloc.
Family ladder purchase
The ladder selected should meet the safety standards, have a good structure and be suitable for work. When buying, renting or borrowing aluminum alloy ladders, please check:
1. Is the ladder clean and dry? There should be no wet paint, oil or mud.
2. Are the steps free of cracks, missing, looseness or bending?
3. Does the handrail bend after cracking or damage?
4. The wooden ladder is not painted? Paint will cover up possible cracks in wooden ladders, and wooden ladders can only be treated with transparent substances such as varnish.
5. The metal ladder is not corroded, and the ladder has no sharp edges or dents?
6. Are stair mats, coverings or other plastic parts in good condition? (Metal ladders should be equipped with non-slip sleeves or foot sleeves).
The above is about the specifications of the domestic high ladder, how high is the most suitable, and what problems should be paid attention to when purchasing. Bian Xiao also wants to tell everyone that we must pay attention to safety when working high above the ground, and see if the place where we put the ladder is safe and correct before operating. Don't do great harm to our health because of our momentary negligence. That's really not worth the candle. I hope everyone can learn from it.
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