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Amtrak ADA Compliant Platform Question
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I seriously doubt that you can avoid putting a tactile surface in for the full length of both platforms, and would recommend that you not try to circumvent it--just put it in the budget and carry on. There are a number of ways to do this. Amtrak likes Armor Tile. There are other vendors as well. I would suggest 12" tiles minimum--do not get the 6x6 as they have a nasty tendency to pop out. A good economical way is to use stampcrete (they make a die with the truncated domes) and dye the concrete a contrasting color when you mix it. If you make this a separate pour, tie the rebar to the main platform pour and put an expansion joint between the two pours (also helps differentiate the tactile surface). This has worked in Michigan so I know it can stand the freeze cycles. We've used it successfully in TX. CTA has some experience and can also give you some guidance as to vendors that make products which work well in the cold and take salt. <br /> <br />Last time I looked, tactile surface in contrasting color is still 2' wide at the track edge of the platform. <br /> <br />There is no ADA requirement on platform length--just that whatever platform you build must be compliant. In our end of the world ATK thinks that they can get by with 300', which is generally not correct, but it has nothing to do with ADA. The incremental cost of making the platform ADA-compliant is minimal compared to the cost of the platform itself. I recommend building the second platform as long as is affordable, and then leave room to extend it. <br /> <br />Make each platform at least 10' wide--for safety. And if you can, go 8" above top of rail (8" TOR). This will clear any equipment on the track, including journals, and eliminate the step box requirement--you'll be amazed at how much faster ATK can load and unload without the step boxes. <br /> <br />Don't forget to light it--5 footcandles minimum. Not ADA, again just basic safety. Shoebox fixtures with HPS or metal halide work just fine. Just get the correct throw. Your design engineer should know all this. <br /> <br />And, assuming you can get a truck in on the field side of the platform for its entire length, pouring should be no big deal. CN is going to make you pay for a flagger during the entire period when the platform work (grading, base, framing, pour and finish, etc.) are being done. <br /> <br />Been there, done that, got the t-shirt.
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