Wednesday, October 17, 2007

Shaft Opening and Foundation Slabs - Just Not Fair

If you are familiar with the tool found on the Modelling menu > Opening > Shaft Opening you have probably become as fond of it as I have. If you are not, it is a specific tool that will cut any floor, ceiling and/or roof it comes into contact with. Just sketch the shape the opening should have, define it's top and bottom constraint as well as any offset you need and Finish the Sketch.

You now have one element that creates a nicely coordinated shaft for the entire vertical height required. If the shape changes you must create another shaft opening for that, still less work than editing floor, ceiling and roof sketches all afternoon.

As a bonus you can also define Symbolic Linework while in sketch mode. This can be the proverbial "X" in your HVAC chase or the Yin/Yang symbol in a circular pipe chase. It can even be the sketch of an elevator.

To make it even better they just need to let us import a detail component and place it while in sketch mode so we don't have to draw the elevator but once or just use a nested dwg in the detail component...but I digress...the unfair bit.

There are Floor and Slab elements and they are the essentially the same but there is also a Foundation Slab and it is different, at least when it comes to the Opening Shaft. On floors and slabs it works, on Foundation Slabs they don't and that's just not fair! Even these need holes cut in them for elevator shaft pits, sump pits etc.

The solution is to use the other option on the same set of tools, Modelling menu > Opening > Opening by Face.

Here are couple images of shaft openings used less conventionally. First is the finished slab that shows using them (shaft openings) to create true holes in a slab so that the floor slab reports actual volume without using Join Geometry between columns and floors. Also showing how the slab edge plan was altered.


This image depicts the shaft openings overlaid on the floors. A bit easier managing a slab edge alteration instead of editing multiple floor sketches by just using one shaft opening.


If you are in a shaft binge mode you can review this earlier POST.

Added THIS POST to the HOK CAD Solutions blog.

1 comment:

Jonas said...

The shaft opening tool is great. I have used to show slab joints that has to line up through the building. But for columns I think that Revit should know to cut a hole/void in the slab where you have a column cutting through.

Jonas