A project we're working on has an existing basement area that is broken up into many small existing rooms. Each room has varying ceiling heights and different grid directions.
The remodel that is going to be done will change all of these small spaces into three areas with a consistent new ceiling height that is about the average height of the existing ceilings.
If you are the engineer preparing bid documents in a scenario like this, would you call out for full pipe replacement, or only to modify the existing branch lines?
I would be interested in how others approach this issue prior to bid.
On one hand, modifying the existing system has the potential to save a significant amount of pipe, but could require some large stretches be raised to accommodate new ceilings and would require a good handful of labor to relocate sprinklers.
On the other hand, while an all-new pipe arrangement may cost more in material, it would be better able to coordinate with new HVAC ductwork and ceilings in the space and could possibly reduce the labor time with a pre-fabricated install.
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