It's a good question and I'm interested as well.
Our company work in excavation. Mostly DOT work with a smattering of private site work. We have a mix of CB460 and earthworks equipment. Our company has a dozen pieces of equipment with GPS capabilities. We generally have a dozen projects in the half million to 1 million in scope. We usually have prime 1 to 3 larger projects (5-10 Mil) through the year, which takes up the majority of my time.
I create as little as 1 design and as many as 4 or 5 depending on the work that's required. We always have a subgrade, regardless of the project. If there is any complications to the project - different pavement or stone depths, then I add on base course designs to give my guys further guidance. Then we will also create storm sewer designs specifically for the rover, giving them line and grade as well as back of curb.
I do most of my surface design in Civil 3D. That has been the program I work most with in the past, so that's probably why I stick with it, but I find it has a lot more control and ease of use. Most likely because I know where everything is and with TBC I have issues even trying to print something to a scale. I'm sure if I didn't have the option, I could get the ins and outs of TBC, but seeing as I have the option, I use it. One thing I will say is that it's very nice to use the program that the designs are designed in. In my state, Civil 3d is the state's required format for designs, so that's the way most design firms have went.
This does cause the same issues that you have, as in if a curb flowline changes, I have multiple designs that I have to adjust, but generally large issues like that get worked out while I'm creating the designs.
The actual process I use to create designs is that I use provided design information as a guide. I draw lines on the surfaces they provide and massage those lines to work with Trimble. For example, Civil 3d allows for straight vertical lines in their corridors. This doesn't work very well with trimble, so I offset the vertical lines by 0.03 feet in order to get a readable vertical cut, which works out great in dozers and is a pain on the rover if you can't see the cross sections. I do my best to check my work a couple times. The best is when you can have someone else look over it. I'm the only one in the office that knows CAD, so I print out quantities and ask project managers if they look right. If they do, then I know I'm on the right track. If they don't, I start hunting.
I couldn't ever immagine sending data out like Patrick does. My guys have a hard enough time dealing with the seperate designs. Trying to teach them how to switch between different linework and surfaces would be a nightmare on my end. I like having the control of what they can see via different designs so that I know if they are going by what I've designed, they aren't going to be making any mistakes. Excavation in my state is cut throat at the moment, a lot of bids are won on less than a percentage of difference, so any loss in work time or added expense due to mistakes is a big deal to my boss.
Private site designs are by far my largest time sinks. There are always add ons to those projects. When designs change, I generally just add on to an existing design or create a new one out of whole cloth.
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Anthony Smith
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