When it comes to building stairs, there are certain standard dimensions that must be taken into consideration. These dimensions are important for safety and comfort when using stairs. The size and shape of the stairway, the type of steps, the angle of the stairway, the height and depth of each step, and the width of each step all play a role in determining how comfortable a staircase is to use. Knowing these standard dimensions can help ensure that your staircase is both safe and comfortable for those who use it.
The tread is the horizontal section of each stair, sometimes called the run. This is the part you step on. Tread depth is the place between the outer edge and the inner edge of the tread surface. Professionals recommend that the tread depth should be more than 11 inches to be safe. As for an aesthetic point of view, you can use what stair flooring you like to cover the tread.
The riser is that vertical section between every tread on the stairs. It is referred to as the height of the stair. Riser height should be between 5″ and 7 7/8″; most are between 7″ and 7 ½”.
A nosing is the edge portion of the tread that exceeds the dimension of the riser. According to standard dimensions, nosing should be less than 1 ½ inches
The angle that the staircase makes with the surface of the ground is called the slope. This angle should be at least 30 degrees and no more than 50 degrees.
The width of the stairs should be 3 ft 6 inches. The wider they are the better because they are safer. Standard stairs handrails have to be more than 44 inches wide.
A landing is that platform at the end of each step flight. Professionals recommend that every staircase should present a landing at every 12 feet (at least).
The handrail is the element that runs parallel to the staircase; it’s used by people to maintain their balance ascending and descending the staircase and is commonly referred to as the “banister.” They are also used for decorative purposes. It should be a minimum of 36″ above the nosing of the tread. The space between the wall and handrail should be no more than 1 5/8″. Also, it is obligatory that the railings should present balusters every four inches.
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