Final answer:
Sheet lead used for flashings of vent terminals shall not be less than 1/16 inch thick, ensuring durability and effectiveness.
Step-by-step explanation:
The question is focused on the minimum thickness of sheet lead used for flashings of vent terminals. Sheet lead for this purpose should not be less than 1/16 inch thick. This thickness ensures that the flashing remains durable and effective at protecting against water infiltration around vent terminals. This is consistent with standard practices in construction and plumbing, where flashings must be durable enough to withstand environmental factors without being so thick as to be impractical for use. Based on the given options, the correct answer is 1) 1/16 inch.