Lumber, drywall, roofing, flooring, carpet, ceiling tile, cabinets, fixtures, shelving, furniture and general cleanout debris are all ordinary roll-off material.
Walker's code carves several things out of what counts as solid waste. Each then needs its own route. The list covers hazardous waste, liquid waste regulated by statute, and ferrous or nonferrous scrap sent to a metal processor. That last one helps rather than restricts. It confirms that scrap metal belongs in a separate stream, where it has value.
The general exclusions apply as usual. Liquids, paint and solvents, fuel, motor oil, antifreeze, pressurized cylinders and asbestos are all excluded from a Walker container. Asbestos is a genuine consideration in Walker's older housing and in its mid-century industrial buildings, where it appears in pipe lagging, floor tile, cement board and roof mastic, and it needs a licensed abatement contractor.
Walker's littering and transport provisions reach a loaded container directly. The code bars moving junk, broken glass, scrap metal or metal shavings over city streets unless the load cannot fall through or over the sides. On an industrial cleanout with sharp metal in it, that is a reason to keep the fill below the rails.
Electronics need a separate stream too, which matters on an office or warehouse clearing where furniture and hardware come out together.
Michigan does not have a state banned-materials list that we assert on these pages, because the source for it has not been re-verified by an acceptable route. Your account manager confirms anything unusual against the receiving site's own acceptance rules instead.