Apprentice question
Stop and ask
Stop. Get direction before you touch it.
A vertical spiral riser needs structural load support. Stop stacking weight on slip joints or light wall straps.
['Vertical duct risers carry their own dead weight down the stack. If that load is sitting on slip joints or light studs, the lower fittings can crush and the run can slide.', 'Hold the riser, brace it safely, and install the approved riser clamp/angle support at structural slab/steel points. Do not keep adding sections until the load path is owned by structure.']