Types of ladders and stairs
Ladders are very different, differ from ladders in that they require support and are called adhering, sliding, inclined or vertical, and the ladders can stand alone, they differ in one-sided and two-sided ascension. They consist of racks on which the construction of steps and platforms is held. The best ladders are equipped with legs and handrails.
Ladders-ladders, GOST of which defines the conditions of their use, are divided into classical or L-shaped, universal and transformers. Universal stepladder can be used as a ladder, it all depends on the need. It consists of three sections, which extend one from the other and form a ladder, quite high. The connection of sections is made by automatic fixatives.
Universal ladders can be telescopic, with extendable sections, and folding, with prefabricated sections. Which stepladder is better, will depend on the specific situation. The possibilities of transformers are much wider. For example, they can form a working platform or an L-shaped ladder. The folded ladder-transformer is very compact and easily fits in the trunk of the car.
The main requirements for the choice of a ladder
The requirements for ladder and ladder are composed of several items. They must be equipped with special devices to prevent any shift or overturning. The lower ends of the posts must have special shoes made of non-slip material.
The step between the steps does not exceed 250 mm. Ladders working platforms above 1.5 m should be equipped with fences or handrails. Metal parts of the ladders should be without cracks, sharp edges or burrs.
To know which ladder to choose, you need to consider its main characteristics: stability, mobility, quality assembly, convenience and safety.
The correct calculation of the design provides GOST, the ladders should be stable in any situation. Because they need to be moved and moved often, the main characteristic is the mass and size in the folded form.
How to choose the maximum safety ladder?
A good stepladder should be characterized by securely fastened elements and strength. Comfort and safety are ensured by the following elements: corrugated steps, anti-slip, dielectric rubber mats, plastic pads covering sharp edges and metal slices, anti-skid shoes on the racks will protect floor coverings and prevent arbitrary sliding.
The choice of a ladder can also depend on such criteria: working height, material from which it is made, and its model. The working height is calculated by adding the height of the working platform and the height of the person to the level of the shoulders. Professional options can have a height of up to 6 meters.
For the manufacture of ladders, modern manufacturers use aluminum or steel. Aluminum devices are characterized by low weight, mobility and are used for working in small rooms. Steel ladders are used in large-scale production and construction, are characterized by stability and durability.
