topic Re: Cable Tray TAG (height by Elevation instead of Levels) in Revit MEP Forum

Cable Tray TAG (height by Elevation instead of Levels)

Anonymous — Mon, 03 Jul 2017 18:42:35 GMT

Revit normally defines the Offset of a Cable Tray by the project Levels.

It only allows you to create a height tag parameter based on the Top/Center/Bottom elevation of the cabletray, and those are indicated by the Offset.

Problem is, I acctually need to define the cabletray Height in my tag according to the Elevation of the room (on the finished floor, which is above those 0.15m).

As you can see through the print-screen, I would like to use h=3.41m for my tag instead of the original h=4.71m.

My tag uses the following parameters: Width, Height, Bottom Elevation

**For now, creating multiple levels is not an option, since here we use the levels according to the structure team.

Re: Cable Tray TAG (height by Elevation instead of Levels)

ToanDN — Mon, 03 Jul 2017 19:57:25 GMT

If you are using 2017 then you could introduce a calculated value to subtract the dimension with an user input delta.

Still, why is adding non-structural/non storey levels @ the finish floors forbidden? They only reside in your file and don't affect any one else in your team.

Re: Cable Tray TAG (height by Elevation instead of Levels)

fabiosato — Tue, 04 Jul 2017 01:31:01 GMT

Hello,

Another option is change the reference level of the cable tray to the desired level.

Re: Cable Tray TAG (height by Elevation instead of Levels)

CADTripper — Tue, 04 Jul 2017 04:18:10 GMT

Assign all the elements in the room to use the "000-TERREO-N95.41" level -select the cable trays and from the "Properties" box change this to that 95.41 level. And since the team knows that structural levels are being used then 3.56 (3.41 + 0.15 FFL) level of your cable tray should be fine after moving this to the room's floor level. You can use the same tag that you have.

Re: Cable Tray TAG (height by Elevation instead of Levels)

CADTripper — Tue, 04 Jul 2017 05:16:57 GMT

I mean 3.56 level of your cable tray should be fine because most of the services above ceiling or at high level will be installed before finishing the floor.

Re: Cable Tray TAG (height by Elevation instead of Levels)

Anonymous — Tue, 04 Jul 2017 16:12:30 GMT

What do you mean by introducing a calculated value?

I was thinking and tried without sucess to create an Instance parameter named "CT_Elevation" for Cabletrays, then create a formula to subtract the Offset with the Elevation. Just like this:

h = (Bottom Elevation) - (CT_Elevation)

But i got lost on creating the formula inside the tag.. Since i can't make formulas inside a Label, where should i apply that?

Ah, and answering about Levels on finished floors.. We are working on the same Central file instead of linking them.

Re: Cable Tray TAG (height by Elevation instead of Levels)

ToanDN — Tue, 04 Jul 2017 17:53:10 GMT

Click on the Hand symbol shown in your last screenshot. That will let you create a Calculated value field as a label, where you can enter the formula.

Re: Cable Tray TAG (height by Elevation instead of Levels)

Anonymous — Wed, 12 Jul 2017 14:16:46 GMT

Despite the fact that we (Electrical, Mechanical, Structural, etc) share the same Central model, I convinced everyone to allow me create to my own Electrical levels for cabletrays and equipments.

The only difference is that i'm using those levels on a Electrical Workset. So if people want to hide it they can create a filter in their view template or something like that.

Well, I don't like it.. Since it may increase the amount of errors during the modeling.

Anyway, i'll keep trying to create a solution for a tag like that.. thanks guys!