Ted:
I am no expert on Interactive Schedules, but here is some information about your request.
1. The Width, Height and Length parameters for the Duct objects (Duct Straight 13) are not the typical, generic A, B and ZZYZX parameters but the object specific Inner Width, Inner Height and Length parameters. In order to add these to the Fields section of the Scheme Settings for use in the schedule, you need to click the Additional Parameters… button and go to MEP Library 13 > MEP library 13.lcf > 1. Ductwork 13 > Segment 13 > Duct Straight 13.gsm and add them. They will then be available as Schedule Fields.
2. For the Criteria, I have used Element Type is Duct.
3. For Fields, I have under Schedule Fields: ID, Inner Width, Inner Height, Length, Notes/Remarks (the last one is not necessary), where is Inner Width is flagged and the Length is Summed. This will yield a list of ducts separated by Inner Widths (but not Inner Heights, so one part of the schedule includes all 8” wide ducts, but also all other Heights (3”, 4”, etc.)) and sum their lengths. This is sort of close but probably not exactly what you want. In the sample file I am using, there is also a combination of 8” (Inner Width) x 3” (Inner Height) ducts and 3” (Inner Width) x 8” (Inner Height) ducts which should really be in the same part of the schedule, but I don’t see a way to combine them in the same section.
4. So I think there are two options:
4a. Use the Additional Parameters… button in the Criteria section to add the Inner Width and Inner Height parameters, set these equal to the various duct sizes, and create as many schedules as there are duct sizes.
4b. Use the ID Field to sort the various duct sizes. The IDs can be changed from the schedule, so all you need to do is generate a schedule of the ducts, then start assigning IDs to section the schedule to suit your needs. Then under the Scheme Settings > Fields, flag the ID for grouping, the Lengths remain summed. This would be my approach, but it depends on exactly what you want to achieve and how much time you want to put in.
There may be a more elegant solution, any insight from more experienced Schedulers is welcome.
David
