With regard to the development of the staircase industry, the design rules for stairs are well documented. Indoor staircases usually need to follow certain rules to make people feel comfortable, smooth, and durable and safe.
Indoor stair design specifications
The specifications of the stairs include the specifications of the pedals and the uprights, and generally require adaptation to the size of the human foot. General pedal width, low standing board will be more comfortable. The pedal width of the interior stairs should not be less than 24 cm, and is generally the most comfortable at 28 cm. The height of the riser should not be higher than 20 cm, generally the most comfortable at 18 cm. Moreover, the width of each pedal and the height of the standing board should be the same, otherwise it is easy for people to fall.
Although the design rules for stairs are often mentioned, there is no definite indicator. They are made by large staircase companies and they are customary in the stair industry. Therefore, there is no specific industrial rigid standard for so-called stair design specifications.