Change floor thickness

Revit
, ,
1

Hi, I was trying to change floor thicknesses using Dynamo/Python scripts with thickness values from excel. I tried two ways as below:

  1. Through Element.SetParameterByName. But it turned out the node cannot modify the thickness which is read-only.
    image
    image1768Ă—421 133 KB
  2. Through Python scripts suggested by this post Parameter is Read Only. But it showed that Floor object has no attribute Thickness. If I changed IronPython2 to CPython3, there was no error but there is no change to the floors.
    image
    image734Ă—617 43.8 KB

image
image1757Ă—467 168 KB

How to change floor thickness then? Because I want to change them by groups of elements (e.g., level by level), I need to process it automatically. Thank you!

Revit model: sample model.rvt - Google Drive
Dynamo:
change design.dyn (19.8 KB)
Excel (thickness values):
test.xlsx (14.2 KB)

2

@Howie ,

dynamo_
dynamo_2490Ă—822 458 KB

for python… you have some basic gabs… in a for loop you need to collect elements… and snoop out Revit API

thats the output from the current node:

import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

def SetCompoundLayerWidth(famtype, index, width):
	try:
		cs = famtype.GetCompoundStructure()
		cs.SetLayerWidth(index,width)
		famtype.SetCompoundStructure(cs)
		return True
	except: return False

doc = DocumentManager.Instance.CurrentDBDocument
famtypes = UnwrapElement(IN[0])
indices = IN[1]
widths = IN[2]

TransactionManager.Instance.EnsureInTransaction(doc)
if isinstance(IN[0], list):
	if isinstance(IN[2], list):
		if isinstance(IN[1], list): OUT = [SetCompoundLayerWidth(x,y,z) for x,y,z in zip(famtypes, indices, widths)]
		else: OUT = [SetCompoundLayerWidth(x,indices,y) for x,y in zip(famtypes, widths)]
	else:
		if isinstance(IN[1], list): OUT = [SetCompoundLayerWidth(x,y,widths) for x,y in zip(famtypes, indices)]
		else: OUT = [SetCompoundLayerWidth(x,indices,widths) for x in famtypes]
else:
	if isinstance(IN[2], list):
		if isinstance(IN[1], list): OUT = [SetCompoundLayerWidth(famtypes,x,y) for x,y in zip(indices, widths)]
		else: OUT = [SetCompoundLayerWidth(famtypes,indices,x) for x in widths]
	else:
		if isinstance(IN[1], list): OUT = [SetCompoundLayerWidth(famtypes,x,widths) for x in indices]
		else: OUT = SetCompoundLayerWidth(famtypes,indices,widths)
TransactionManager.Instance.TransactionTaskDone()
4 Likes
3

Instead of editing the slab, it’s likely best to edit the compound layer structure. The API class for that is here: CompoundStructure Class (revitapidocs.com).

I believe that the Clockwork package has some great nodes for this as well.

2 Likes
4

Thank you very much @Draxl_Andreas @jacob.small.

@Draxl_Andreas The graph nodes failed with False results. The python codes worked but it would change the thicknesses of all the elements using that type even through I only selected some (e.g., elements at a level). Is there a way to change only the input elements?