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What is minimum height this year?

50cm for div. B and 60cm for div. C

I do not have my copy of the rules yet, but those sound like the height for maximum points, not minimums.

retired1 wrote:I do not have my copy of the rules yet, but those sound like the height for maximum points, not minimums.

They are minimums, outlined in rule 3.c., and there is no maximum height.

so... the angle of the columns is actually greater for B than C... interesting.

True, but remember that this person is measuring the angle from the "table" to the leg. So, It has to be more vertical.

dholdgreve wrote:so... the angle of the columns is actually greater for B than C... interesting.

Isn't this true for bridge also? Though there is no height limitation, a B bridge's compression will have a larger angle relative to the table than a C bridge with the same height.

slowpoke wrote:

dholdgreve wrote:so... the angle of the columns is actually greater for B than C... interesting.

Isn't this true for bridge also? Though there is no height limitation, a B bridge's compression will have a larger angle relative to the table than a C bridge with the same height.

A longer bridge has a greater moment. Only the component of force normal to the radius affects the moment. The angles the main structural components make with ground in bridges are typically very different from those for towers.

bernard wrote:

slowpoke wrote:

dholdgreve wrote:so... the angle of the columns is actually greater for B than C... interesting.

Isn't this true for bridge also? Though there is no height limitation, a B bridge's compression will have a larger angle relative to the table than a C bridge with the same height.

A longer bridge has a greater moment. Only the component of force normal to the radius affects the moment. The angles the main structural components make with ground in bridges are typically very different from those for towers.

Hmm..I was just saying that they were similar in that B division bridges would have a larger angle than C division bridges just as in towers. But now that I think about it, how are the angles in towers B greater than C? I'm confused, maybe just about which angles we're talking about...

The angle is measured at the table. The narrower the leg spacing, the greater the angle.
I do not see how this has anything to do with bridges since it is not an event this year.
That said, the more vertical a leg is, the less bracing it requires for most tower construction. Past towers had a wide base with a rather sharp angle to the top "chimney" portion. Because this was a shallower angle it required more bracing.
Not so this year.