Concrete panels as bridge?

haybob

Member
Livestock Farmer
I would look into a professional bridge installation using tried and tested construction methods. It might be more expensive but it will be better than installing something and crossing your fingers.
 

dgjeynes

Member
So the rsjs are old 14” by 6”
Brook span is approximately 20ft
It’s only access to one field and we go there reasonably often.
need to run a forager and muck spreaders or tanker.
banks are firm.
We were thinking of digging into the banks laying a panel flat either side of the brook to land the 4 rsjs onto then put the other panels flat on top of the rsjs.
 

Bongodog

Member
So the rsjs are old 14” by 6”
Brook span is approximately 20ft
It’s only access to one field and we go there reasonably often.
need to run a forager and muck spreaders or tanker.
banks are firm.
We were thinking of digging into the banks laying a panel flat either side of the brook to land the 4 rsjs onto then put the other panels flat on top of the rsjs.
To me the risk factor is way too high for an amateur job 20 foot span bridge for heavy and expensive machinery needs professional calculations not a have a go and hope approach.
 

Mur Huwcun

Member
Livestock Farmer
Location
North West Wales
So the rsjs are old 14” by 6”
Brook span is approximately 20ft
It’s only access to one field and we go there reasonably often.
need to run a forager and muck spreaders or tanker.
banks are firm.
We were thinking of digging into the banks laying a panel flat either side of the brook to land the 4 rsjs onto then put the other panels flat on top of the rsjs.

Sounds feasible but I’d rather pour a mass of concrete to secure the RSJs, maybe get them blasted and galvenized first? Do it once. Build it on the floor to be able to be bolted together then get it galved?

I would also think you will need to specify load bearing panels as well, not 4” shed ones!!!
 

onesiedale

Member
Livestock Farmer
Location
Derbyshire
So the rsjs are old 14” by 6”
Brook span is approximately 20ft
It’s only access to one field and we go there reasonably often.
need to run a forager and muck spreaders or tanker.
banks are firm.
We were thinking of digging into the banks laying a panel flat either side of the brook to land the 4 rsjs onto then put the other panels flat on top of the rsjs.
I would think minimum of 4 or even better 5 or 6 RSJ's fixed onto a good , well seated panel on each bank would be enough to carry the load. 6" panels laid on top and fixed in place would be fine. Why not get some proper construction floor panels that are made for the job rather than wall panels?
They'll probably work out similar cost.
Or make enquiries with a proper pre-cast manufacturers about some sections. If you piggy-back onto a big civils contract then they shouldn't have to make up a special mould and the cost will 'only' be concrete, haulage and lifting in place.
Try McCann's nr Derby that's their job.
 

onesiedale

Member
Livestock Farmer
Location
Derbyshire
Too many Isambard Kingdom Brunel's on here.
Just drop a pipe in the brook and chuck a load of rubble on top.
11331914-unstable-bridge-over-river-in-thorsmork-iceland-.jpg

... like this one in Iceland, just make sure the foundations on the bank side are a good solid base and you'll be fine :ROFLMAO:
 

Montexy

Member
To me the risk factor is way too high for an amateur job 20 foot span bridge for heavy and expensive machinery needs professional calculations not a have a go and hope approach.
Calculations for the RSJ's would be cheap enough, I once built a house extension and the RSJ spanning the lower floor had to have the load calculations lodged with the local council. I would have thought for something like a bridge you would need to safeguard yourself. A few hundred quid well spent for the peice of mind it will give. I expect the insurance company will want to see it in the event of any accident involving the bridge.
 

335d

Member
We’ve got to put a new bridge in over our brook. We’ve already got 4 old large rsjs. Looking to lay them across then put panels flat down on them running cross ways anybody ever done something similar?

if the panels are designed for the purpose then fine. if it’s normal wall panels then I would forget it. they only have a few tension wires across them. Perfectly adequate for what they are designed to do, but not for driving on. talk to your supplier and they will get you the right panel.
 

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