CAD Models Needed

[simonm]

I'm currently looking for CAD models of WTC and the surrounding area. Any help would be greatly appreciated.

[sabbat hunter]

1. any reason why?

at my old job we did a ton of work for the PA at the WTC site. CAD mapping.

why are you lookign for these?

[simonm]

2. Exploration

For visually testing out a few scenarios.

[greyl]

3. How much detail do you need

and how much are you willing to pay?

[Old and In the Way]

4. I'm surprised no one in the 9/11 Truth movement hasn't attempted

to design an open source model. Of course, it would be helpful to have the engineering blueprints so the design parameters could be faithfully reflected in the model. It would be fascinating to see how various scenarios/variables effect the collapse time and dynamics of the buildings. Would make a great graduate thesis for someone in the Computer Sciences...

[AlienSpaceBat]

5. There undoubtedly already are 3D software models

of the WTC and environs. There are quite a few diagrams and graphics that I've seen that undoubtedly have a software basis.

For the purposes of plotting approach paths, sight lines and debris fields etc the model doesnt need to be very complex, just showing the surrounding buildings at the right height & dimensions for a few hundred yards each way would be a great start.

[Old and In the Way]

6. You'd need a very sophisticated, dynamic model.

Just doing a CAD model isn't enough. You'd need dynamic variables that can be programmed to reflect various scenarios and have them interact with the virtual structure. Then you'd need to see how the collapse could be simulated. It truely would be an enormous task, but certainly within the capabilities of structural engineers that can write this type of code. Actually, I'd think the basic software applications to "build" and test virtual structures is already on the market.

[AlienSpaceBat]

8. He was asking for a CAD model

A simulation of the collapse is a whole different ball game. I don't think that is what he wanted.

[greyl]

9. As soon as he answers the questions, we'll know.

It doesn't make sense that if he has a computer running a 3D program and is capable of testing out various scenarios, that he's not capable of modeling a simple replica himself.

[AZCat]

10. Sort of...

The problem with the WTC collapses is that you must model more than just the structural response to stimulus - you must also model the thermal response. That can get complicated very quickly. I run lots of thermal calculations at work and even the more sophisticated retail models are simplified. Part of this is because of the nonlinearity of heat transfer - it makes simulation difficult.

I am reluctant to trust structural load programs also - especially when modelling transients and collapses. The software the NIST used (ANSYS) hasn't proved to me that it can accurately model structural response (even with simple 2D dynamic loading).

[greyl]

7. Yes, there are many, in many different file types. nt

[AZCat]

11. I don't know how accurate this is...

or how accurate you need, but here is the link to a model:

http://3dcadbrowser.com/preview.aspx?ModelCode=2925