Ladder rung series combines two different levels. Stairs, as used in the buildings, in different levels and in the garden city also provides the connection between the streets and squares in different heights.
Outdoor stairs to the flat part of the pressing foot "step width", while the other combines the width of two digits "risers" is called. For a comfortable output; 2 x height + step risers are trying to comply with the 64 cm width = formula. Usually it does not put more than two consecutive steps. Together shelf is continued after the addition of the steps. Stair railings are placed on the left side idle handrail to hold onto it in manually. On both sides of the stairs for the overflow of water into the well, a so-called greenhouse height must be made. The staircase is called the volume occupied by the ladder bucket. The slope of the stairs, generally range from 48 ° to 8 °. Tilt increases, risers height increases, step width narrows.
Stairs become flat or rotating. Risers are parallel in straight ladder, step width are equal. In rotating rectangular shape of the risers of the stairs and step width parallelism is lost.
They also fixed and portable ladders can be classified. Portable (mobile) in the folding ladder, hook, rope, fire department, there are many varieties, such as sliding steps.
Many people now and escalators that can be used in place continuously used. Metro, the underground market, which in escalator seen in places such as large stores, there is no need to go on foot. The first step a person stepped up, take a step meridv from the end of the stairs and through the next level. This currency movement on the stairs are provided with electric motors.
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