good morning everybody I have the following problem:

I would like to calculate the total weight of the beam in a strcture: I assigned the value of the density to each element, the volume of each element is automatically calculated by revit so I create an abacus in whitch I calculate the mass of each element as volume*density by a calculated parameter called “weight of the beam”.

unluckily i can’t export to excel directly through the calculated parameter “weight of the beam” because is just a parameter of the abacus, so I would need a function in dynamo which allows me to transfer the value of the “weight of the beam” calculated in the abacus to an instance parameter for each beam.

I think I need some identificative parameter for having this passage.

Anyway, some ideas? How can i do?

I allegue below the abacus I referred to.

thanks in advance