What is the space between posts on a staircase?

The space between posts on a staircase, also known as the distance between balusters or spindles, is typically regulated by building codes to ensure safety. A common standard is to have a maximum spacing of 4 inches between the posts or balusters. This measurement is important to prevent small children from squeezing through the balusters and potentially falling, as well as to provide adequate support for the handrail.

While narrower spaces may provide additional safety, the 4-inch guideline effectively balances safety with aesthetic considerations. Beyond safety, maintaining consistent spacing helps to create a visually appealing and uniform appearance in the construction of the staircase. As such, when building or renovating staircases, adhering to this standard is crucial for compliance with codes and for ensuring user safety.