This is the seventh blog is a series on what makes a good glass factory trolley. 

I've had some interesting feedback on this series of blogs on glass trolleys. One reader asked about the health and safety implications of having (or not having) brakes on trolleys. For those that work in factories where the floor is sloping you'll understand this issue. Most trolleys have castors with a push down brake which locks the castor. These work well unless the castor is a swivel (and they mostly are) as the castor has the ability swing under the trolley preventing the user from activating the brake. 

One option would be to use a similar system to the trolleys used in airports where the trolley can only be moved if a sprung loaded arm is held. Letting go springs the brake into action and holds the trolley. Has anyone tried this? What were the results? I'm keen to know.