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
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
They don't want a mobile truck inspection for this.
RE: permanent mobile maintenance platform design for bridges
RE: permanent mobile maintenance platform design for bridges
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
RE: permanent mobile maintenance platform design for bridges
RE: permanent mobile maintenance platform design for bridges
The live load shall depend on intended use, and shall be 30-50 psf, plus concentrated 750-1000 lbs at any location, non-concurrent.
As travellers are installed on the long span bridges, these are not specifically covered by AASHTO, or other bridge codes, so the design specification shall be discussed with the bridge owner.
Other interesting aspects of the traveler design are the propulsion system and power supply, which could external, or internal by small generator installed on the platform. Catenaries are prone to corrosion and dirt, and coiling or folding cables tends to tangle frequently, so generator is typically a preferred choice.
There is some interesting link covering the subject: http://ravenelbridge.net/traveler.php
RE: permanent mobile maintenance platform design for bridges
Also, from these things, you can't reach everywhere. You may have elements that require hands-on inspection and a snooper may be needed anyway. Talk to them some more about what they want/need and intend to accomplish. Depending on how many bridges there are, unique configurations of travelers you need to design/build/maintain and operating costs, they could be getting close to the cost of just buying a snooper (300K-500K).
IC