Ok Hutch, found Huntsman's figures and I belive we ran these from the same sources -
Huntsman's posting
If anyone see's a math error, please point it out.
Mass = ~ 89585 Kg, that's half the max load, going to be erroring on the side of caution
Speed = 475 Mph or 764 Kph (212 M/s), propably slower then the real impact speed, but again erroring on the side of caution. Also this helps up establish a lower limit.
Kinetic Energy = 1/2 Mass * Velocity squared
KE = .5*89585 * (212^2)
KE = 44792.5 * 44944
KE = 2013154120 Joules
Just for fun, from
wikipedia.org we see that a kilo of TNT packs 4184000 joules of energy. Or our impact is equal to 1060 pounds of TNT. Granted this is just impact energy on the low end. Kick the speed up to a more belivible 885 Kph or 550 Mph and we have a KE of 2706991189 Joules or 1426 pounds of TNT. Anyway, I digress.
From
Boeing's 767 site we get a wing span of 47.6m. Leading edge surface are seems a bit tricky to track down, from
JANE'S we have a leading edge slats surface area of 28.3 squre meters. I'm going to up that to 35 meter, take into account the fusealauge, engines, rest of the wings that is not slats, so please take with a grain of salt. So taking our low-end figure of 2013154120 joules and divide by 35 M^2, we get 57518689.14 joules per square meter. Comes out to 13.75 Kg of TNT per M^2.
From
rikzilla quoting Huntsman we find that to cut a steel column with TNT, the formula is P=3/8*A, where P is the TNT-equivalent, in pounds, and A is the cross-sectional area, in inches.
This is were my brain goes plop. If Huntsman is out there, hopefully he can dod the math for what is needed to shear an exterior column.