Serial obsession.

Max. Load = (SWL) x Angle Factor x Reeve Factor.

That's the easy bit. Though I wonder if PWB would sponsor me to tattoo their Herc Alloy chain chart on the inside of my arm?

The harder one, of course, is mobile crane packing pad size - area per pad = W * R / B x V x N, where W is the total load weight (including slings & hoist blocks) plus *half* the boom weight, and R is the operating radius in metres. B is ... um ... the distance from the outriggers to the opposite wheel of the crane, V is the bearing pressure of the ground under the crane, and N is the number of pads. Note that even though all outriggers must be deployed, the calculation includes only those on the side over which the load is being lifted.

Ha! I remembered!

OF course, *real* riggers are apparently quite easily identified on a building site as being the ones carrying books full of this shit, so I only have to remember it for the test. But still.

I took off early at lunch today, I must admit, in consultation with the instructor, after determining that he was going to spend the afternoon going through the formulae yet again. Except that then we spend Monday-Thursday doing prac, and we're tested on the formulae next Friday in the written. So, pointless going over them *again* today - I know them, and I'll have to revise during the week anyway for Friday. So I sat in the Blue Train having lunch and ... uh, studying. Sad geek that I am.

Mmmm, 4 days of crane prac starting Monday. Mmmm.

sol.
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