Final answer:
A communal tenant who removes shelves they installed is dealing with a 'trade fixture,' which they are typically allowed to remove before the lease ends as long as it doesn't significantly damage the property.
Step-by-step explanation:
When a communal tenant decides to leave a building and takes the shelves that they installed, the type of fixture you are referring to is termed a trade fixture or a chattel fixture. Trade fixtures are articles placed in or attached to rented buildings or lands by the tenant, for the purpose of carrying on a trade or business. These fixtures can often be removed by the tenant before the lease expires, provided that the removal does not cause significant damage to the property. However, the specific laws regarding fixtures can vary based on jurisdiction, lease agreements, and other factors.