[Rtrorkt]

take a good look above the dropped ceiling. Make sure that they did not use this install due to pipes or ducts that hang below the floor joists for the floor above. This is reason most folks opt for a lay in clg in a basement. If you have pipes/ducts and they are concentrated in one area, they you can furr down to enclose.

In putting up any clg make sure that you look for needed access points to critical items from above (drain clean outs, duct filters, etc). If you need access and install a drywall ceiling or other type that does not allow for easy access, you will need to plan for that.

Done many designs and have run into these problems repeatedly.