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Forums >> Revit Building >> Technical Support >> Carving up a site

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Tue, Jun 27, 2006 at 4:02:11 AM | Carving up a site

#1

cadjockey


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Hi all, I am working on a residential project which is nestled on the edge of a hill which has some serious contour. The road that services these units needs to be graded accordingly as it passes by each residential lot. Each lot is set at a different level in order to take avantage of the existing terrain. I have tried using the 'grade' tool but I am finding the entire toposurface is altered when I use this tool and not just the area where I am placing the road giving me an unrealistic view of the contours at the residential lots. The resulting toposurface is nothing like the original. I was expecting the toposurface to change only where I have placed the road. I also tried the split surface tool which worked accuratley in so much as showing a distinct drop in level where the road has cut into the hill. Howver, I don't think the cut/fill calculations are correct. How have others dealt with this challenge? cadjockey

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Wed, Jun 28, 2006 at 4:09:49 AM | RE: Carving up a site

#2

goum


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Had a site recently which sounds a bit like yours. Depending on the extent of the road, you could try editing the topo surface and adding "points", (at a specified height), firstly according to the adjacent road surface, then add additional points at higher or lower heights depending on which direction the site grades. I would probably leave the road as a "split surface". This will take a bit of time, both to work out and make look right if the site is fairly inticate.

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GN Brisbane, Q Australia

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Wed, Jun 28, 2006 at 7:10:47 AM | RE: Carving up a site

#3

hisdirt


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Hey guys, unless Im missing something big.... have you guys used pads at all? Or are they not appropriate and am I not reading your posts properly...

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Thu, Jun 29, 2006 at 3:07:36 AM | RE: Carving up a site

#4

goum


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I may have read the original post incorrectly. I would agree with hisdirt on this one. Use the pad tool to create each building level. You will still end up with a dramatic cut or fill. You can grade the surrounds of the pad by editing the topo surface and adding "points" at the required height. I hope I understood your question this time, if not I'll just crawl back under the rock I came from.

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GN Brisbane, Q Australia

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Mon, Jul 3, 2006 at 3:01:03 AM | RE: Carving up a site

#5

cadjockey


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Hi Guys, Creating a pad was my first approach. Revit wouldn't allow me to complete the procedure. I was told the pad could not be partly floating in the air. I was expecting revit to place fill where the pad extended beyond the natural contour of the site. As for the road the only way could find to create this as it would actually be is to manipulate the topo point by point using the gradient tool. Very time consuming. Especially when your system is srugling on the hardware front (3.2 single core processor, 1 gig ram). My next challenge is to create the kerbs which needs to follow the road as it winds and changes contour across the site. Any pointers? cadjockey

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Mon, Jul 3, 2006 at 3:24:26 AM | RE: Carving up a site

#6

hisdirt


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Thats really strange actually, when I create pads they float around as much as I want them to... might the error have been that pads couldnt extend beyond the edges of the topo surface? Thats one Ive heard before... What version Revit are you using?

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Mon, Jul 3, 2006 at 3:38:15 AM | RE: Carving up a site

#7

cadjockey


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Hi hisdirt, I am using 8.1. I just tried the pad tool on a test site and it worked. It placed fill and cut the site as required. Howevr, I can't seem to find the volumes involved. I tried creating a topography schedule using the cut, fill and net cut/fill fields but no data is aggregated no matter what phase setting I use. The site which I used the gradient tool on has these calclulations aggregated. Although it is total and not a lot by lot basis. cadjockey

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