A mattress is the worst-shaped object in a residential move. It is light enough that people assume it is easy and large enough that it is not: it will not turn a tight corridor corner on edge, it will not go into a passenger elevator alongside anyone else, and a foam unit that has been compressed in a bed base for six years has usually taken a permanent bend that makes it worse, not better, to carry. In a Marina del Rey building that object has to travel from a unit door, along a corridor, into a reserved freight elevator, through a service lobby and out to wherever a truck is allowed to stand.
Which means the reservation is the schedule. Most managed buildings here restrict large-item movement to a defined window and require the freight elevator to be booked in advance, and some will not release the service door until a certificate of insurance naming the right entities is on file. We work to those windows because there is no version of this job that does not. If the building gives you a two-hour slot on a Wednesday morning, that is the job, and the honest thing is to tell you on the quote whether the whole load fits inside it or whether the mattress goes on the first movement and the rest follows.
Underground parking is the other constraint, and it cuts the same way it does for furniture. Where a truck cannot get down the ramp, the mattress comes up on the freight elevator and out through a service door to a vehicle staged on the surface, which adds a carry that is real and that we would rather price at the walk-through. Slip holders have a version of this too: a berth is not a loading area, and a cabin mattress or a V-berth cushion set comes up a dock, along a gangway and across a parking lot before it reaches anything with wheels.
Nothing about this is a reason to leave a mattress in a corridor or beside a trash room. Under County Code Title 20, Section 72 nothing may sit at a place of collection before 5 p.m. on the day preceding a scheduled collection, and the County tells customers to wait for the hauler's confirmation before setting anything out. An abandoned mattress in a service area is a management problem within the hour and, in the County's framing, an illegal dumping problem shortly after that.
Sources: Los Angeles County Department of Beaches and Harbors, Marina del Rey FAQ; CleanLA, Los Angeles County Public Works Environmental Programs Division — Trash Collection; Los Angeles County Public Works, Exclusive Commercial Franchise Solid Waste Collection Services Frequently Asked Questions (PDF, revised December 2023).