What is the required distance for a single-wall metal pipe to be higher than any portion of a building within a horizontal distance of 10 feet?

The correct distance a single-wall metal pipe must be above any portion of a building within a horizontal distance of 10 feet is 2 feet. This requirement is part of safety regulations designed to prevent ignition sources from coming too close to combustible structures.

By maintaining a minimum height of 2 feet above the highest point of the building, it ensures that heat and potential flames from the exhaust are adequately dispersed upward, minimizing the risk of fire hazards or structural damage.

Choosing a greater height, such as 3 feet, 4 feet, or 5 feet, may provide additional safety but is not mandated or required under the standard regulations for this specific situation. The 2-foot requirement is a balance between operational safety and practicality for installation.