hanging box 1

[jdtayl0]

I to get some tips on analyzing a hanging box traffic signal configuration. Especially the sag calculations.

 

[ACtrafficengr]

NYSDOT has a spanwire calculation program you can download from their website:

http://dotweb1.dot.state.ny.us/design/apps/spanwire/spanwire.html

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"Come to think of it, there are already a million monkeys typing on a million typewriters, and the Usenet is NOTHING like Shakespeare.

Blair Houghton

 

[jdtayl0]

Thanks, that program will help, but I am specifically looking for information on analyzing the "hanging box" configuration.

 

[ACtrafficengr]

In NY a "box span" is comprised of two spanwires crossing in the middle. What do you mean by "hanging box"?

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"Come to think of it, there are already a million monkeys typing on a million typewriters, and the Usenet is NOTHING like Shakespeare.

Blair Houghton

 

[jdtayl0]

The hanging box that I am refering to is a variation to a simple square configuration with four strain poles with the cable spanning between each of them. We use a hanging box when the intersection requires large distances between the poles which puts the signal too far away from the stop bar. With the hanging box you have one cable attatched to each pole. These shorter cables run a distance and connect to the "box" or the square. It just makes the square smaller than if you just connected the poles. I understand that the tension will be nearly the same as with a square configuration but I don't know exactly how to calculate the sag. I was hoping to find out how other states handle this.
Thanks

 

[ACtrafficengr]

Um, have you tried the structural forum yet?

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"Come to think of it, there are already a million monkeys typing on a million typewriters, and the Usenet is NOTHING like Shakespeare.

Blair Houghton