Seems like only one person here has given you a reasonable answer.

https://publicworks.baltimorecity.gov/solid-waste/drop-off

The real answer is you can take it to the northwest transfer station on Reisterstown road. It costs $67.50/ton and you need to be weighed in and weighed out to dump there.

The city specifically seperates construction trash because if they didn't the other drop off spots would be a mess of contractors dumping construction debris from everywhere for free when they are meant as resident household trash dump spots.

Alternatively you can break it down into smaller pieces and throw it out in bags in your trash. Might just take longer depending on how much you can fit in a can.

Your last choice would be to get a [bagster](Your friend has shared a link to a Home Depot product they think you would be interested in seeing:

https://www.homedepot.com/p/WM-Bagster-Dumpster-in-a-Bag-Holds-up-to-3-300-lb-775-658/202228840) from home depot thay you fill up and call to have hauled away. It's more expensive than dropping yourself but easier. This does require space to sit the bag, space for a truck to get to the bag and you need to make sure they pickup where you live first as well.