Bridge weight capacity
Bridge weight capacity
(OP)
A series of bridges in a developing country are rated at T44 (42.5 tonnes) I want to drive a total of 80t across the bridge. How many axles do I need or is it impossible?
Please and thank you.
Please and thank you.
RE: Bridge weight capacity
You may also be over the legal road weight which may require you to obtain a special transportation permit for your load.
Contact the DOT where your project is located and inquire about a permit and the bridge capacity.
RE: Bridge weight capacity
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-Dik
RE: Bridge weight capacity
RE: Bridge weight capacity
It could be a somewhat iterative process to arrive at an answer. Are you the trucker who is shipping this thing? Does this fit on a trailer or do you need dolleys? Once you have a scheme for shipping the load, analyzing the girder is easy. You can adjust your load factors if the truck will be the only one on the bridge. If the analysis shows the girder can't support the initial axle road, look at a different trailer with more axles and repeat the analysis.
RE: Bridge weight capacity
Australia?
RE: Bridge weight capacity
You'll either have to ask the government body responsible for the bridge and/or hire an experienced local bridge engineer to check for you. (Experienced because it's not a straightforward problem to solve efficiently, local because they'll likely need to inspect the bridge). 42.5t to 80t is quite the stretch, but depending on the bridge and methods allowed, not impossible.
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just call me Lo.
RE: Bridge weight capacity
One load/ trailer or?
You will need more axles anyway for the road axle limit.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Bridge weight capacity
See, you have (correctly) identified (a single) bridge load limit that you need to exceed - by twice its normal rated load. The other comments above (correctly) address ways to be able (maybe) safely get over that one bridge.
But your load is threatened by EVERY other bridge, under-strength culvert, railroad crossing, raised roadbed, gravel or old embankment, pothole and sink hole, diversion ditch or side road and buried pipe UNDER every road between loading point and job site. Look also at overhead clearances and dangling wires between loading point and job site. Developing countries are notorious by "locally stringing" (illegally tapping power lines or overloading and bending telephone/power poles alongside and across the road itself.