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Roof OB?

Functionally the 2 m rule is a vertical plane.

It's not though.

Think about a disc in a tree down in a valley where the disc is below the level of the fairway (plenty of examples at DeLaveaga).

The defining aspect of the 2m is is that the disc is isn't on the playing surface. Rather, it's suspended 2m above the playing surface. If one disc is on the playing surface, and another isn't, but they are both at the same height above sea level, one is safe and the other isn't regardless of where they sit on some horizontal plane.
 
It doesn't solve the issue. The difference is if a disc is hanging off the edge of an IB bridge over OB, it's still IB. The problem being looked at here is that a disc hanging off an OB roof is over IB space and thus is IB. The OP is looking for that case to be OB.

Couldn't the TD declare that the OB line for discs on the roof is one disc width beyond the gutter?
 
It's not though.

Think about a disc in a tree down in a valley where the disc is below the level of the fairway (plenty of examples at DeLaveaga).

The defining aspect of the 2m is is that the disc is isn't on the playing surface. Rather, it's suspended 2m above the playing surface. If one disc is on the playing surface, and another isn't, but they are both at the same height above sea level, one is safe and the other isn't regardless of where they sit on some horizontal plane.

Working too hard on that logic.

Calling it a horizontal plane is not universally accurate, but within the boundary conditions I was contemplating it is adequate.

And since your disc is not a quantum particle the nuance is irrelevant.

;).
 
Couldn't the TD declare that the OB line for discs on the roof is one disc width beyond the gutter?

That would also have the effect of discs on the ground at that point also OB. Which if we don't want players throwing at the building, might not be a bad thing.
 
Four stroke penalty for hitting any part of the building. That might discourage a few people from trying to go over it.
 
That would also have the effect of discs on the ground at that point also OB. Which if we don't want players throwing at the building, might not be a bad thing.

On the ground being OB would be OK, but I was going for the roof being a different playing surface. The disc is played per the rules of the playing surface it is on.
 
On the ground being OB would be OK, but I was going for the roof being a different playing surface. The disc is played per the rules of the playing surface it is on.

Can a surface that a player can't take a stance on be a playing surface?

802.05 Lie
A. The lie is the place on the playing surface upon which the player takes a stance in order to throw. The playing surface is a surface, generally the ground, which is capable of supporting the player and from which a stance can reasonably be taken. A playing surface may exist above or below another playing surface. If it is unclear whether a surface is a playing surface, the decision is made by the Director or by an Official. [Italics original]
 
Can a surface that a player can't take a stance on be a playing surface?

802.05 Lie
Unplayable lie.

If your disc floats on water, is it only a playing surface if you are Moses?
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Seems like a functional way to handle this situation under the rules is to simply call landing "inside" the building OB (even though it's not possible to do so) and the roof is IB to where players get "above ground" relief to the ground with no penalty. Making landing inside the building OB allows players to mark up to 1 meter from the building when landing on the roof or near the building walls.

Essentially, the building plays like a giant tree trunk with the roof being a surface of branches. For those who think it should involve a penalty, consider that the player may not be able to retrieve the disc during the round, temporarily losing their disc, and their lie is near the building potentially blocking the route to the basket. If you want to make it more punitive without a penalty, add the stipulation that when a disc lands on the roof, it must be marked by the building in a position on the line of play no closer to the target or specify a drop zone positioned so it's still a challenging throw to the target from its location.
 
Seems like a functional way to handle this situation under the rules is to simply call landing "inside" the building OB (even though it's not possible to do so) and the roof is IB to where players get "above ground" relief to the ground with no penalty. Making landing inside the building OB allows players to mark up to 1 meter from the building when landing on the roof or near the building walls.

Essentially, the building plays like a giant tree trunk with the roof being a surface of branches. For those who think it should involve a penalty, consider that the player may not be able to retrieve the disc during the round, temporarily losing their disc, and their lie is near the building potentially blocking the route to the basket. If you want to make it more punitive without a penalty, add the stipulation that when a disc lands on the roof, it must be marked by the building in a position on the line of play no closer to the target or specify a drop zone positioned so it's still a challenging throw to the target from its location.
It's definitely possible.
 
It's definitely possible.
Even better. I was just indicating that it's a clever idea to declare that the inside of a building, rock wall or giant boulder as OB, even if it's not possible to land inside of it so players can get relief up to 1 meter from it.

Hatched this OB idea when a designer had a basket located about 20 feet from a massive rock face that was too big for players to reasonably climb over and beyond it to take solid object relief if their disc landed next to or was leaning against it. By declaring that landing inside the rock face would be OB, it allowed players to take up to 1 meter relief from that face, even though it was in the direction of the basket. I'm thinking readers have encountered situations where this "inside is OB" concept would be helpful.
 
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