Solid lids are 6 ft 5 in wide by 6 ft 5 in long and are 6 inches thick and weigh approx 700 kgs. They have a 30 in square solid inspection cover.
Again there are sockets for lifting eyes built into the lids and the inspection covers. This ensures that the lid can be easily moved and installed.
We mix our own concrete in our specialised batching plant. This leads to a stronger mix.
We NEVER use ready mix in our products.