(a) Sheet metal work means to layout, design,. fabricate, and install ducts, registers, air filters, humidity and thermostatic controls, ventilating systems complete with blowers, ducts, plenum chambers, and registers, with or without air filters and humidity and thermostatic controls, in such a manner that air-conditioning and ventilating systems can be executed and installed.
(b) Sheet metal work means, also, to select, cut, shape, fabricate, and install sheet metal such as cornices, flashings, gutters, leaders, rainwater downspouts, pans, kitchen equipment, duct work, metal flues, etc., or to do any part or any combination of any thereof. Licenses may be obtained for the sheet metal category only.History: Contractors Lic. Bd. Classification of Contractors' Licenses, eff 12 Feb 73, (part).