Where is the installation of gas piping not specifically prohibited?

• A. Adjacent to an exterior stairway
• B. In a basement
• C. Under a deck
• D. Inside a garage

Answer: (A)

The installation of gas piping is generally guided by safety regulations and codes that dictate where it is permissible to install these pipes. When considering the choices, installing gas piping adjacent to an exterior stairway is often not expressly prohibited, as this area can be adequately ventilated.

Conversely, the other choices typically involve locations that have safety considerations that usually lead to restrictions or more stringent requirements. For instance, the area in a basement can present risks related to gas accumulation and ventilation, requiring careful adherence to safety codes. Similarly, under a deck or inside a garage can pose significant hazards due to the potential for gas leaks in confined or semi-enclosed spaces where ventilation may be inadequate. These areas are prone to increased risk due to their enclosed nature, leading to a higher likelihood of dangerous conditions if a gas leak were to occur.

Thus, installing gas piping adjacent to an exterior stairway is seen as acceptable because it allows for better air circulation and reduces the likelihood of trapped gas.