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Johnpl315

Extracting over a weak bridge

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Hi guys, 

 I potentially have some very small scale forestry work coming up and there will be around 50 tons of timber to come out down a byway over a weak bridge. 

 I will be extracting with a small alpine tractor and trailer which will has a maximum mass when loaded of 5 tons. 

 Personally I believe the bridge will be fine because it's a short span, the full weight will never be on the bridge and horses etc use it all the time. 

 The client is a little concerned about damaging it however because if it collapsed it could block the stream which could then flood a neighbouring property. They have suggested I could put down some kind of support over the bridge, such as the kind used to temporarily cover manholes during roadworks. 

 I have done some googling but I can't quite find what I am looking for. 

 I am of the opinion that a few scaffold boards doubled up would do the job and be more cost effective. 

 Does anyone else have any ideas? 

Thanks

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Pics would be good, i have image in my head of North West Frontier film 😉 K

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Pit props under it .

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Is there room to throw a few sleepers down next to the bridge and make a temporary crossing?

We did this to get a dumper across a stream.

 

IMG_1923.thumb.JPG.752d933588ded941eed73e3133727800.JPG

 

 

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Just now, aspenarb said:

Is there room to throw a few sleepers down next to the bridge and make a temporary crossing?

We did this to get a dumper across a stream.

 

IMG_1923.thumb.JPG.752d933588ded941eed73e3133727800.JPG

 

 

Seems to hold a Jack Russel ok ! 👍

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  • Haha 1

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How deep is the drop? Can you drop a few trunks in to drive over and remove them at the end? If you use big stuff the water should still flow in a small ish stream. 

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I`ve seen pre stressed concrete panels, like you use for silage pit/shed walls used length ways over the top of a weak bridge, to get timber trucks across.

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