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permanent mobile maintenance platform design for bridges

permanent mobile maintenance platform design for bridges

permanent mobile maintenance platform design for bridges

(OP)
I'm interested in design standards and specifications if any are available for this. The contractor just said want this on every bridge and span on a project I'm working on and I have no idea were to begin. If any of you know something about designing this type of platforms I would appreciate your help. Thank you!

RE: permanent mobile maintenance platform design for bridges

I'm having trouble understanding what is meant by "permanent mobile". Do you mean permanently mounted to the bridge, but able to move along it?

There are many mobile inspection vehicles for sale or rent.
http://www.bridgeaccessspecialties.com/

http://barcus.com/snooper-truck-services/

http://www.bridgeriggers.com/?_vsrefdom=adwords&am...

https://www.harconcorp.com/bridge-inspection-equip...

RE: permanent mobile maintenance platform design for bridges

(OP)
Thank you for the response OSUCivlEng. Yes this platforms will be permanent mounted on the bridge and need to be mobile to perform inspections and maintenance works for the entire span as per contractors request.
They don't want a mobile truck inspection for this.

RE: permanent mobile maintenance platform design for bridges

You mean a traveller. I've never designed one but have rode on a few. They are usually made of small wide flange or channel sections supporting metal grating. The sides are usually angles. The Travellers ride on rails that hang from either the web or bottom flanges of the supporting girders. I have to look through my files, may have something. You're going to need a mechanical and an electrical engineer.

RE: permanent mobile maintenance platform design for bridges

Bridgebuster's summary is correct.

I've never seen a design code or reference intended specifically for travelers. The closest I've come is some of the material for (underslung) crane wheel loads, which is an important design limitation. Otherwise, all the work I have done has been per AISC (and like BB, I've excluded the mechanical and electrical scope).

----
The name is a long story -- just call me Lo.

RE: permanent mobile maintenance platform design for bridges

@George89Ro - attached is a traveler rail drawing. A few years ago I did a job for a contractor involving a long span bridge that had several travelers. Mywork had nothing to do with the travelers. When I get I home tonight I'll take a look to see if any of the drawings provided to me show traveler details.

RE: permanent mobile maintenance platform design for bridges

I don't have the traveler drawing but you can get a glimpse of it in the background. The platform with the yellow chain is a temporary platform. The part that appears to be an "upper level" is really a safety cage for the access ladder and a platform for some electrical equipment. This one has a horizontal frame as a bumper when it gets close to a pier.

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