'Ello again, DW. As promised, notes on my own attempts at game-ifying lifts:

My numbers are for a non-GURPS, in-progress home-brew. The rules themselves employ "log" stats, which will be meaningless out of context, so I've translated that to lift in kg (it's metric-based).

The base stats below are for a normal human. The source is limited data on "normal people" lifts, plus some reverse-engineering from record-setting lifts, plus a little self-measurement (based on a purely arbitrary guess at my own strength).

I put a lot of thought into the numbers, but now upon dusting them off a bit, they feel a bit low. Keep in mind that they're for a "base" adult, not notably athletic, and not necessarily male at that. They're also entirely prior to any sort of bonus from unusual effort or skill. So assuming for the moment that they may be realistic:

One-hand lifts

• Max one-hand lift to chest level = 16kg (This would be a free, standing curl, no arm rest used.)
• Max one-hand lift smoothly overhead = 12.5kg
• Max one-hand lift to arm's length = 8 kg (Sounds very low, but try holding that weight at arm's length...)

Two-hand lifts

• Max two-hand lift to chest level = 32kg
• Max two-hand lift smoothly overhead = 32kg. (This is with no assistance or "slip" moves, just pure lifting power.)

Specialty lifts

Unlike the above smooth overhead lift, the below have the lifter raising the weight partway and then "slipping under" (pardon me if my terminology is far from professional). The numbers assume a successful skill check for proper execution (but no other special bonus for skill).

• Two-stage Clean and Jerk overhead = 50kg
• Snatch = 40kg

Notes

My ratio of Clean and Jerk to Snatch is 5/4, nicely close to your suggested 6/5.

I didn't tackle bench press, but I'll take your word for it: roughly 25% higher than Clean and Jerk. I can use that; thanks!

Now, what I don't recall is how I tied those to max human lift – i.e., what multiplier I used. I can probably dig it up, but the end results should be along the lines of yours; I'm sure we looked at much of the same record lift data.

And something I haven't done is explicitly tie max lift to lifter weight, as you have in this thread, other than via basic scaling: max human strength in my rules will generally require the scaled-up size of a large lifter, with appropriately scaled-up weight.

Whenever I make this skeleton of a rules-set public, it should provide a few interesting bones for the rules hacker crowd to pick over. Your notes on size and ST are helpful to me and to GURPS hackers as well.