JanessaTheGreat1208 JanessaTheGreat1208 13-02-2024 Engineering contestada Thimbles for chimneys or vent connectors shall be made of either _____ or ________ with a minimum thickness of_________. a) fireclay, galvanized steel, 24 gauge b) concrete, metal, 18 gauge c) ceramic, plastic, 22 gauge d) brick, stone, 20 gauge