How can I place structural frame families by the path

Hi Guys, I’m very very fresh man of Dynamo.

Already I’ve asked this but I have not solved this problem yet…

There are various structural frames with varying cross-sectional shapes. These structural frames are supposed to be placed on one curve, and I want to place these structural frame families one at a time from the starting point of the curve, given the distance from Excel.

I want to make it like this


use Excel
K-003

First,
How can I load a structural frame family with a length defined by Excel?

Second,
I want to place a structural frame sectionA up to 5m from the start of the curve, then a structural frame sectionB (as defined in Excel) from 5m to 10m… what node should I use?

Third,
Section A is used one more time after 37m from the beginning of the curve. Other sections are used repeatedly as well. In this case, can I save the second or third SectionA with a different name with special rules?