Is a cage that is used to transport gas bottle cylinders classified as an attachment on a lift truck. We have a forklift that transports gas cylinders around our work site. I thought it would be classified as an "attachment" but also see it being like a pallet just carrying a load. It is like a man lift cage that goes on a lift truck but the gate on the front locks and we can strap the bottles in the cage. There is also a ramp to easily slide the bottles on and off the cage. The trucks capacity does not get changed as the defined load center is unchanged. Looking for some clarification. Thanks