Side Curtain Trailer vs Box Trailer – Which Saves More Loading Time?
- A dispatcher's 15‑minute revelation
Last December, I was at a warehouse in Laem Chabang, Thailand. Mr. Somchai, who runs a small fleet of 12 trailers, was furious. His driver had been waiting for three hours to get a box trailer loaded with palletized auto parts. The forklift operator kept moving in and out through the tiny rear door. Each pallet took nearly two minutes just to position.
Somchai pointed at a side curtain trailer parked next to it – his own, but empty. "That one," he said, "would have been done in 45 minutes. But my customer insists on box trailers because they think it's more secure."
I asked if we could test his claim. He agreed.
The test – same cargo, same warehouse, two trailers
We loaded 26 pallets of rubber gaskets – each 1.2m x 1m – onto his 40‑ft box trailer. Two forklifts, one driver, one dock. The only access was the rear door. Every pallet had to be squared, pushed in, and stacked. Total time: 2 hours and 17 minutes. The driver spent most of that just waiting for the forklift to back out and reposition.
Three days later, we loaded the same cargo onto his side curtain trailer. The forklift operator rolled up both curtains. He entered from the side, placed the first row of pallets in 12 minutes, then moved to the other side. No backing out. No waiting. The operator even laughed: "This is like eating noodles with a big spoon."
Total time for 26 pallets: 51 minutes.
What the drivers said
Somchai's senior driver, Mr. Manot, told me: "With a box trailer, I lose my loading slot if the forklift takes too long. With side curtains, I can even help – throw the straps, slide the pallets myself. I'm not just sitting."
The warehouse manager added an unexpected note: unloading at the destination took 40 minutes from the box trailer but only 18 minutes from the side curtain. Because the receiver could open both sides and pull pallets directly onto their own forklift.
But there's a catch
Side curtains aren't always faster. If your cargo is loose, small cartons, or needs full weather sealing, you spend extra time strapping and tarping. One of Somchai's customers ships bagged rice – they tried side curtains and went back to box trailers because the bags kept falling out during transit.
For palletized, shrink‑wrapped, or large items – side curtains win every time. For loose cargo or frequent rain? Box trailer, despite the slower loading.
What Somchai does now
He keeps six side curtain trailers for his factory clients who ship uniform pallets. And four box trailers for mixed or bagged goods. His drivers' daily wait time dropped by 70%. He told me last month: "I don't care about the theory. My forklift operator finishes earlier and drinks his coffee before noon."
So which saves more loading time? Walk into your warehouse. Look at your cargo. If you see rows of identical pallets, call me – I'll show you a side curtain. If you see bags, boxes, and chaos, stick with the box.
