- Often we are only interested in seeing a railing in plan
- Everyone knows that balusters in Revit railings are um, tricky, to say the least!
- Balusters, fixings, transitions etc are incredibly difficult to get right in Revit railings so many people just do those in 2d in a section view. Yes, very "un-Revit", but pragmatic
Top Rail Railing ExtentsWith the new style of v2013 railings you can still use the old method of horizontal rails, described in my earlier post on Top Rails in Revit Railings. If you do this, there would be no issues with railing extents.
If your railing has only a Top Rail, but no balusters, no supports, no old style rails, then it will cause problems.
|No rail structure, no balusters|
This problem shows up in two situations: groups and selection by click and drag.
GroupsIf you create a group that contains a railing with only Top Rails, the overall extents of the group will include the extents of the railing, and hence your project origin point (in v2013). This could result in a group with very large extents, causing all kinds of confusion.
In Revit Sundial (test version of Revit 2015 subscription enhancements, yet to be released), the code has been changed a little so that the extents do not include 0,0,0 but instead seem to include the previous location of a stair/railing that has moved. Each time you move the stair/railing, the extents remember the previous location. How weird is that? Not sure when this was changed.
SelectionIf you select a stair and railing by dragging across them from left to right (to include them wholly), it would normally include the stair, its sub-components, the railing and its sub-components (inc. top rails). NB. check this in the filter selection
However, if your railing has only Top Rails, but no other sub-components, the extents of the railing would most likely be bigger so that the railings are not selected. This is very confusing because the Top Rails are selected, which visually looks like railings are also selected - check the selection filter to see that they are not.
In this situation you would need to manually add in the railings to your selection. You might be tempted to select by dragging from right to left, which would capture the railings because it crosses their extents - but any good Revit user knows that this is seriously bad practise because it could also include hidden elements (That is the number one Autocad habit that new Revit users must unlearn!). Once the parent railings have been added in to the selection set, the Create Group command becomes available.
Good news: In Revit Sundial, the list of railing sub-categories has been tidied up so they are listed together by adding a "Railing:" prefix (like the stairs). Its only a little thing, but it makes life easier - thanks Factory.
Top Rail Properties in Revit Railings
Weird Railing Stuff:
Part 1 - Top Rail Transitions
Part 3 - Railing Sketch Offsets & Transitions