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It depends on whether you’re looking at residential or commercial buildings. For residential buildings, the 2018 International Residential Code asks for a maximum riser (or rise) height of 7 3/4 inches and a minimum tread depth (or run) of 10 inches.

For fixed stairs in commercial buildings, OSHA requires a rise between 6 and 7.5 inches, with a run between 10 and 14 inches. The standards are different for spiral staircases.

If it’s time to remove your deck, there are several advantages to replacing it with a patio. For example, you’ll pay much less to build a patio than a new deck, especially if the framework is compromised. A patio also needs less maintenance and will last longer. However, replacing your patio with a deck may not be an option if your terrain is on a slope.

A concrete patio lasts an average of 30 years, but the length of life you’ll get from yours depends largely on the climate. In harsh conditions, including excessive rainfall and snowfall, a concrete patio may only last for 15 years. In a moderate climate and with non-expansive, supportive soil below, a concrete patio could last for up to 50 years.

Deciding between concrete, stone, or brick pavers comes down to your budget and the ease of installation. Concrete is the least expensive material, followed by brick and then natural stone. Concrete pavers are also the easiest to install, but bricks are relatively easy as well. Stone pavers require more time and labor because their natural shapes make them harder to fit together. Professional stoneworkers, however, are able to shape them as needed.