Towers B/C

[Cow481]

I made a 6.2 gram tower and was wondering if I needed a horizontal brace at the top of the chimney. The tower is 6 x braces for the bottom and 5 x braces for the chimney and the wood size is 1/8 by 1/8 and 1/32 by 1/16 for braces. Thanks

Need? Can't say for certain, but I'd sure recommend you do it. These top ladders can be from pretty light wood. Using 0.8gr/36" 1/8" wood, you'd be adding about 0.14gr wood - say 0.16gr w/ glue. With 0.7gr/36, a little less. Small price for additional stability.....

Thanks for the reply

[DarthBuilder]

So my tower is 58.5cm High. What can I do to make it above 60cm? I messed up my measurements. Am I allowed to just put a stick that’s two cm high at the very top so it passes the 60cm mark?

Edit: loading block must be places above 60cm

[reed303]

So my tower is 58.5cm High. What can I do to make it above 60cm? I messed up my measurements. Am I allowed to just put a stick that’s two cm high at the very top so it passes the 60cm mark?

Per Rule 3.c, it would appear just a stick would not suffice. Or it must be such that it can support the Loading Block .

"The Tower must support the Loading Block (5.b.i.) a minimum of 50.0 cm (Division B) or 60.0 cm (DivisionC)above the Test Base"

[WhatScience?]

So my tower is 58.5cm High. What can I do to make it above 60cm? I messed up my measurements. Am I allowed to just put a stick that’s two cm high at the very top so it passes the 60cm mark?

Per Rule 3.c, it would appear just a stick would not suffice. Or it must be such that it can support the Loading Block .

"The Tower must support the Loading Block (5.b.i.) a minimum of 50.0 cm (Division B) or 60.0 cm (DivisionC)above the Test Base"

If you really don't want to build another tower, add 4 1.5 centimeter sticks and connect them like you would the top. You can even add an small x bracing if you want the strength

[DarthBuilder]

60.2

[TowerPro+2500]

my tower weighs 4.17 g and holds 11.313 kilograms (no bonus) . the chain goes through on my testing rig and everything works fine but i have an equilateral triangle base that fits on a corner of the cut out square, and doesn't "span" the entire square. is this legal? my tower score is ~2712

[dholdgreve]

I don't think it is required that it spans the entire opening, but what IS required is that the chain drops to within 2.5 cm of the center of the 20 cm x 20 cm opening in the table top. I can't visualize your design, but I can't imagine how this is possible with a triangle tower that only wraps 2 sides of the opening. On our testing table we have a 20 cm x 20 cm opening cut through the 3/4" thick top. We then took a 1/4" thick piece of plywood and mounted it to the under side of the table across the entire opening cut above. Then we drilled a 5 cm diameter hole directly in the center of the 20 x 20 opening. If your chain doesn't drop through that circle without hanging on the edge of it, it does not pass muster... sorry.

[TowerPro+2500]

I don't think it is required that it spans the entire opening, but what IS required is that the chain drops to within 2.5 cm of the center of the 20 cm x 20 cm opening in the table top. I can't visualize your design, but I can't imagine how this is possible with a triangle tower that only wraps 2 sides of the opening. On our testing table we have a 20 cm x 20 cm opening cut through the 3/4" thick top. We then took a 1/4" thick piece of plywood and mounted it to the under side of the table across the entire opening cut above. Then we drilled a 5 cm diameter hole directly in the center of the 20 x 20 opening. If your chain doesn't drop through that circle without hanging on the edge of it, it does not pass muster... sorry.

Thanks, I must have missed the rule about within 2.5 cm of the opening. The chain doesn't hang on the edge, but there is no way that it is within 2.5 cm of the opening.

[TowerPro+2500]

by the way, what is IS? I should probably know this

[dholdgreve]

"IS" would be "is" with a little more "ooomph!"