An in Depth Look at Manhole Shutters - 22/07/15
Following on from an earlier entry about the humble road plate, I thought I’d make a showcase of the often abused, manhole shutter. It may seem like a simple, primitive piece of equipment but even these simple tools have a raft of technical data and calculations to back them.
Considering that the shutter is, for the most part, just a 2mm thick sheet of steel, they are deceptively strong. This is primarily down to the way in which they carry the load from the fresh concrete within.