Stairs are special devices, without which it is impossible to do in any two- or more storey building. Smaller devices are widely used in supermarkets, shops, warehouses. None of the repair or construction of high-rise buildings can not do without stairs.
The types of such structures
Staircase - construction, which includes a large number of stages, horizontal. There are several types.
- Ladder - ferrule, that unfolds. In most cases, made of metal or aluminum, It consists of two sections with, and may have steps like the one, and on both sides. It is used in the household, supermarkets, warehouses, during repair facilities.
- Side - a ladder leaning against the wall. Primarily, they are made of wood, sometimes used metal. Ladders rarely have a height of more than three meters, because the higher structure, the less its resilience. Respectively, increased risk of falls and injuries.
- ladder transformer - a universal product. It combines the ladder and the ladder. In such a construction can contain up to four sections, each has a plurality of stages. Parts are reliably connected using fixers. If necessary, can transform into the platform.
- Tower - connection of two single -section staircases. These are quite strong designs, which are securely fixed by metal screeds. At the top there is a platform.
- Plant - specialized flooring, which is installed on strong supports.
Besides, stairs are classified according to the number of sections: mono-, bi-, three- and the four-part structure. products, which have more than two sections, It called universal. They are very convenient to operate. If necessary,, can be used as a bailry stairs or ladder.
design Features
stairs, which are used in everyday life, can withstand the load until 150 kg. If the product is able to withstand much more, then it is considered professional and is used in many areas. An ordinary ladder rarely has a height of more than two meters, and addl - three. Professional ladder can also have a working height of twenty meters.
Safe operations on the ladder depends largely on the strength of the support structure. Any product equipped with special straps to Acquire or insurance.
Stairs can be equipped with a different number of steps: from three to twenty. They need to pay special attention. It is desirable to select a knurled surface or with special mats, that will prevent sliding.
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