OK. So lets rotate my spoke diagram and mirror the wall beam..... That makes it more clear?

Remember that with the spokes the "beam" is the rest of the spokes and the rim that works to hold the spoke at the angle to the tangential torque.

In fact here's why the wheel spoke has a virtual "beam". It's the other spokes that hold it at the angle to the force. In this quick sketch I've only shown the other 7 pulling spokes on the one side for clarity but you can fill in the rest. This is what I mean that the "beam" is the rest of the wheel.