Final answer:
Gas vent pipes on roof pitches up to 6/12 must be 12 inches high above the point where they pass through the roof and also be at least 2 feet above any part of the building within 10 feet horizontally.
Step-by-step explanation:
The question pertains to requirements for gas vent pipes in relation to their height above a roof with a given pitch. When dealing with roof pitches up to 6/12, gas vent pipes need to terminate at least 12 inches above the point where the vent passes through the roof. Moreover, the vent should also be at least 2 feet higher than any portion of a building within a horizontal distance of 10 feet. It is crucial to ensure that the gas vent pipes are installed with the proper height to prevent potential hazards and to comply with building codes.