On Highways back in the 50s we had a 6,ton and a 10,ton cookers, the only time I was working with on the Austin factory relaying the west works main road, they where brought in site Pickfords low loaders. On nights where two mixer men and three labourers, they were so high you couldn't throw the blocks in, you had to throw them onto the stage then throw them into the mixer, the grit had to be bucketed to the stage and into the mixer, when the drive belt broke it was like a 30 Ft. whip lashing above you head, it went from the engine to the drive wheel by the banjo at the front in a figure of eight with No Guard. We used to have 3 ton out of the 6 tonner and recharge to get it out later plus the 10 tonner, that's if it was ready in the morning.