Spot slope in Dynamo

How can i place Spot Slopes on every face of a Floor with Dynamo.

I don’t think creation of spot slopes are open in the API, thus not possible to create such element through Dynamo.

Other possible question is place a slope arrow (which is just a generic annotation as I’ve read you can’t place the out of the box slope arrows using dynamo) onto the center line of a pipe.

Thank you