The concrete guys poured a shaft out of plumb, and my duct won't drop straight. How do I adjust?
4th YearAdvanced Problem SolvingRED · Stop / Verify
Drop a heavy surveyor's plumb bob line from the top opening of the shaft down to the bottom floor level to map out the exact location and depth dimensions of the concrete encroachment. * Fabricate a series of custom, gradual, long-length Ogee (OG) offset duct fittings to shepherd your vertical duct riser run smoothly around the out-of-plumb concrete wall projections. Ensure you maintain your code-required minimum perimeter clearance widths inside the shaft track.