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目前世界自动扶梯的产量每年不少于1500台。除了方便性和经济效果之外,对自动扶梯的主要要求之一是安全性。其安全性取决于扶梯的倾斜角,梯阶的尺寸,运行速度,栏杆和驱动装置的结构。自动扶梯与水平线所构成的倾角采用30°和35°。对于高度大的扶梯,采用30°倾角最适宜。现代自动扶梯开步梯阶的尺寸为40毫米,梯阶宽度为600—1000毫米。在宽1000毫米的梯阶上可允许一个乘客在梯阶上站着,而共他乘客能从站着的乘客旁边通过行走。梯阶的表面复盖层制成沟槽间距小的铝质梳形凸棱。譬如,按美国标准,在梯阶表面上宽25.4毫米内应当有三个凸棱,沟槽的宽度应等于5.75毫米,而相邻凸棱之间的距离为8.5毫米。
The current annual production of the world’s escalators not less than 1,500 units. In addition to convenience and economy, one of the main requirements for escalators is safety. Its safety depends on the angle of inclination of the escalator, the size of the steps, the running speed, the structure of the railing and drive. The inclination of the escalator to the horizontal is 30 ° and 35 °. For the height of the escalator, the most suitable angle of 30 °. The size of a modern escalator step is 40 mm and the step width is 600-1000 mm. On a 1,000-mm wide step, a passenger can be allowed to stand on the steps, while a total of passengers can walk by standing passengers. The step cover is made of an aluminum comb-shaped rib with a small groove pitch. For example, according to U.S. standards, there should be three ribs on the step surface 25.4 mm wide. The width of the groove should be equal to 5.75 mm and the distance between adjacent ribs should be 8.5 mm.