American Home Inspectors Training (AHIT) Practice Test

The maximum spacing allowed for balusters on railings, set by most building codes, is typically 4 inches. This standard is in place primarily for safety reasons, particularly to prevent young children from being able to slip through the railing or become trapped. When balusters are spaced more than 4 inches apart, there's an increased risk of accidents, as small children can fit through larger gaps and potentially fall. While some building codes may vary regionally, many align with the established safety regulations that specify this 4-inch maximum to effectively mitigate risks associated with falls from height. This uniformity in building codes helps ensure that structures are safe for occupants, particularly in residential settings where children may be present.