Cable out of the downtown Dallas vertical city.

A riser is a vertical run of feeder and branch cable between the service equipment and the floors above it. When a tenant leaves, a floor changes use or a landlord takes space back, the cable that served it is either abandoned in place or pulled and coiled on the floor it came from.

Busway risers appear in the taller buildings, and the cable that feeds them at the base and connects at each tap box is usually the part that leaves with a contractor. Keep the busway sections and the cable as separate lists, because they are reviewed on different facts and loaded by different methods.

Older towers take service at a vault below grade or at a street-level switch room, and both are awkward rooms to work in. A service entrance replacement leaves the old SEU or SER, any paralleled service conductors the building carried, and the cable pulled out of conduit during the change.

Say early whether the vault is reached by a stair, a hatch or a lift, and whether the old cable was cut out or left in the conduit. Conductor abandoned in conduit is often written off, because nobody wants to pull it, while conductor coiled on a vault floor is a straightforward lot to count and weigh.

Loading shapes every downtown collection. Freight elevators are booked against a building calendar, cab protection is required before anything goes in, and a shared alley dock may serve several buildings on fifteen-minute windows that the property manager controls rather than the tenant. The dock window is the part of a downtown lot that decides whether a collection is possible at all.

A straight truck fits where a fifty-three-foot trailer does not, and a load staged in the right sequence moves in one lift rather than three. Photograph the pile where it sits, note the floor and the lift that serves it, and the loading plan writes itself before the truck leaves the yard.

Send the dock window and the freight booking before a date is agreed. A missed elevator slot downtown costs a day, not an hour.

Riser cable arrives in coils per floor, and a coil tagged with its floor and circuit is easier to review than a mixed pile in a loading bay. A strip of tape with the floor number takes a second at the point of removal and settles a long argument later at the dock.

Photograph the jacket print, the coil and the room it came out of. A buyer reading a photo of a print can usually name the construction; a buyer reading someone's written description of a print is guessing, and the guessing gets carried into the terms.