Container Loading and Site Assembly of a Cleaning Line: A Buyer Checklist

The expensive part of buying a cleaning line is not the equipment. It is finding out on arrival that the tallest module will not stand up under the beams, that a fan will not pass through the doorway, or that a crate of fasteners is missing and nobody wrote it on the delivery note. Each of those can be settled before the container is packed, for the cost of a few drawings and a couple of emails.

Three things decide whether the installation goes smoothly:

• The shipping breakdown. What travels assembled and what travels as modules, and what the heaviest single piece weighs and measures.
• The lifting plan. Which crane or hoist can reach the installation point, and whether the route in is clear.
• The record on arrival. What you counted, what was damaged, and what you signed for.

How the machines are broken down for shipment

A machine that works as one unit in the plant does not travel as one unit. The design question is how far it can be split for transport and still be straightforward to put back together on site.

Packing groups for cleaning equipment usually look like this:

• Frame and body modules. The machine frame, the screen box or deck structure and the main housing, split so that each piece can be handled at both ends of the journey.
• Drives separated. Motors, gearboxes, pulleys and belts are normally removed or crated separately, because a drive left hanging on a shaft for a sea crossing is a bearing waiting to be damaged.
• Fans and duct sections. These travel separately and are joined on site with bolted flanges and flexible sleeves.
• Loose items in one crate. Fasteners, guards, handles, inspection doors, switches, small spouts and fittings. This is the crate that goes missing, so it is the crate to count on arrival.
• The control cabinet. Crated on its own, packed against moisture rather than impact, and often the least convenient crate to move.
• Screen decks and mesh. Shipped flat, either inside the machine or in a separate flat crate. Mesh bent in transit still looks usable and will not clean properly afterwards.

Ask for a packing list keyed to marks on each crate, and ask which mark belongs to which assembly step. A crate marked with a number that means nothing to your fitters will be opened at the wrong time.

What to check before you sign the delivery note

The delivery note decides who pays for a damaged part. Once it is signed clean, the argument about a bent guard rail becomes your argument.

• Container or vehicle condition. Look before unloading: damaged doors, a damp floor, condensation on the ceiling, a load that has shifted. Photograph it as you find it.
• Crate count against the packing list. Count marks, not cartons, and write down any mark that is short.
• Impact and water damage. Crushed corners, split panels, rust blooms on unpainted faces, water stains on timber. Record each crate before it is opened, not after.
• Electrical items. Motors, cabinets and sensors deserve a look for water ingress and loose parts, since internal damage does not appear in a photograph of the outside.
• Sign with exceptions. Whatever the driver prefers, write your exceptions on the note and keep a copy. A line saying the carton was damaged costs nothing and settles an argument later.

Then unpack within days rather than weeks. Problems raised while the container is still in the yard are easy to resolve. Problems raised months later are hard to separate from storage and handling.

Staging: unpack in assembly order, not crate order

Lay the line out in the order it will be built. Fasteners, guards and fittings should stay with the machine they belong to. A shared pile of bolts in the middle of the floor is how the wrong bolt ends up in a drive.

• Store mesh and screen decks flat and dry, off the floor, with nothing stacked on them.
• Keep motors, cabinets and instruments in a dry room until they are being fitted.
• Check that nothing was left inside the machine. Tools, blocking timber and shipping braces are packed inside housings more often than anyone expects, and are found after start-up more often than before it.
• Keep the packing timber until the installation is finished. It is your temporary blocking and your protection during lifting.

Planning the lift and the assembly sequence

Decide the lifting method before the crane is on site. For each module you need the weight, the centre of gravity and the marked lifting points. If a module has no lifting points, that is a question for the supplier, not a challenge for the riggers.

• Lift on the frame, not on a shaft, a guard, a duct flange or an eye bolt that is not rated for it.
• Use a spreader bar where slings would otherwise crush a panel or a duct.
• Keep people out of the area under a suspended module, and use tag lines so it cannot swing into the structure.
• Confirm the route in is clear before the crane arrives. A module stuck in a doorway holds up everything after it.

The sequence that works on typical cleaning equipment runs: set and level the base frame, anchor it, mount the screen box or deck structure, fit the drive, fit fans and ducts, connect spouts and flexible sleeves, fit guards, then hand over for the electrical connection.

Level the frame on shims and packing, then anchor it. Do not use anchor bolts to pull a frame straight. That leaves the frame stressed and the deck out of level, which shows up later as uneven material flow across the screen. Any electrical connection, including a rotation check, is work for a licensed electrician, with the supply isolated, locked out and the voltage verified before anything is touched.

Two joints cause a good share of the reassembly trouble. The connection between a vibrating body and fixed ductwork must be flexible enough to isolate the movement and must be fitted without a twist. A bolted flange that does not meet squarely is the other one: pulling it shut with force distorts the panel behind it. If it does not meet, the spout is the wrong length, and that is a fabrication question rather than a fitting question.

Actions to take before the container is packed

• Ask for the packing list, the module weights and dimensions, and the overall height drawing. Check them against your doorways, beams and floor, measured rather than estimated.
• Confirm which items ship assembled and which are split, and ask whether the split can be changed to suit your access.
• Book the lifting equipment from the module weights, and name the person responsible for the lift.
• Have the electrical data confirmed in writing, with the incoming supply, the cable route and the cabinet position agreed in advance.
• Name the person who will count crates against the packing list, give them a camera, and let them sign with exceptions.
• Keep one short written record: what arrived, what was damaged, what is outstanding, and who was told.

The installation itself is routine when the preparation is done. A large share of the problems buyers report comes from the preparation being left to the day the truck arrives.