Friday, 5 October 2007

Revit - stairs to levels with varying heights

David Ivey, Chicago asks: "Is there a way to get Revit to land stairs at floor level when the levels having varying heights (i.e. the number of risers needs to change?"

Kiajoon Tan, London replies: The tread and risers will work for different runs within a same stair, To create different runs just do the appropriate maths and drag how many risers you want for each run, Release the mouse button when you have enough rosers for each run and then start the next run. The stair shown is created by controlling the number of desired risers to 30 and maximum height to 175 per riser, totally calculated to a 5.25m height to get the exact mid landing at riser number 20. i.e. you must be consistent with a common riser denominator with your levels.

But … sometimes will have problems resizing the different landings as they will end as far as how many threads you have for each run. If you have a shorter flight the landing will end short of a longer flight. Railings can also be an issue as sometimes they cannot be hosted properly. (Mind your head on the landing! - Ed)

Spot Elevation Tool tip for foundations

Victor Martinez from NY asks: "When using the Spot Elevation tool with either the Project or Relative setting, the value shown when tagging a Pad in plan reports the elevation of the bottom of the Pad, even though the top of the pad is set to the correct level. Is this the correct value or a bug? Should we be placing a slab above the pad so that the tag displays the correct elevation? When tagging in section we can choose the top of the pad. Any feedback would be appreciated."

Cyril Verley's solution: "I recommend that you think of the “pad” as a vapour barrier and set the thickness to 1/16 (or 1-2mm)” instead of a floor slab. Place it and then place a real floor slab on top of it. This will give you a more accurate scheduling of the floor slabs vs. building pad. It will also help set the elevation tag correctly since it will display the “true” floor slab height."