BJ44,
Unfortunately all of my pre-1988 BHP data on their 'non-structural' sections went to the great archive in the sky. However, I would hope that you could still get some useful stuff from BHP-Billiton and/or Onesteel if you persist.
The following is from a brochure which I received ages ago from Steelcon P/L, whose address at the time was 21 Wisdom Road, greenwich, NSW 2065.
The SP75 was a typical U-shaped pile, similar to Larssen. I don't have info on the material properties, but you shouldn't go far wrong if you assume Grade 250. If the material strength looks critical, you could always test a sample or two.
Properties of the fully interlocked and uncorroded wall were Ixx 194*10^6 mm^4/m, Zxx 1560*10^3 mm^3/m.
Depending on the ground through which the piles were driven, I would advise some caution in assuming the fully interlocked values (unless you can see at site that the sheets were welded together in pairs before driving).
Original properties of the single pile sections were
area 9480 mm^2, Ixx 26.6*10^6 mm^4, Zx 273*10^3 mm^3 to clutch, 513 to face of wall, radius of gyration 53 mm.
The finished wall was 248 mm overall deep, with clutches at 391 mm c/c. Remaining dimensions are (a) too difficult to describe without a sketch and (b) probably not much value to you anyway.
I hope that this helps.
