Time for a new bridge - how to engineer?

   / Time for a new bridge - how to engineer? #31  
WE need pictures of the project as it goes along.
 
   / Time for a new bridge - how to engineer?
  • Thread Starter
#32  
Will definitely post pictures of the project, which I hope to do in early April, weather-permitting.
 
   / Time for a new bridge - how to engineer? #34  
   / Time for a new bridge - how to engineer? #35  
So whats the plan of attack for this bad boy? Some reading material to help.

A Landowner's Guide to Building Forest Access Roads - Stream Crossing Methods

Little more practical guide than just a bunch of pipe specs. You should be looking at a minimum of 12" of cover and hopefully a 15" pipe or larger based on this guide.

I"d have got to the manual before we got done. ;). Remember that a 12" minimum cover is just that a MINIMUM. Two to three feet is better and reduces stress on the pipe.
Now if we could just have a USGS contour map of the up stream area we could figure out the correct size for the pipe.
 
   / Time for a new bridge - how to engineer? #36  
So whats the plan of attack for this bad boy? Some reading material to help.

A Landowner's Guide to Building Forest Access Roads - Stream Crossing Methods

Little more practical guide than just a bunch of pipe specs. You should be looking at a minimum of 12" of cover and hopefully a 15" pipe or larger based on this guide.

I"d have got to the manual before we got done. ;). Remember that a 12" minimum cover is just that a MINIMUM. Two to three feet is better and reduces stress on the pipe.
Now if we could just have a USGS contour map of the up stream area we could figure out the correct size for the pipe.
 
   / Time for a new bridge - how to engineer? #37  
I"d have got to the manual before we got done. ;). Remember that a 12" minimum cover is just that a MINIMUM. Two to three feet is better and reduces stress on the pipe.
Now if we could just have a USGS contour map of the up stream area we could figure out the correct size for the pipe.

Just keeping an eye on ya! :thumbsup: More cover is definitely better for pipe life. The only problem is your side slopes and the length of pipe that they eat up getting to the driving surface. He will Likely will have to put in double the amount of pipe compared to the actual driving surface. No one ever drives on the very edge of the road anyways.
 
   / Time for a new bridge - how to engineer? #38  
Just keeping an eye on ya! :thumbsup: More cover is definitely better for pipe life. The only problem is your side slopes and the length of pipe that they eat up getting to the driving surface. He will Likely will have to put in double the amount of pipe compared to the actual driving surface. No one ever drives on the very edge of the road anyways.

Yup You need enough pipe to go under the road and the side slopes. With 30 feet of pipe you could have two feet of cover with 3 to 1 side slopes and retain an eighteen foot road way. You can buy it in 20s and 10s so one each would do it. More pipe is cheaper then building headers to save pipe.
 
   / Time for a new bridge - how to engineer? #39  
Dress up the ends of the culvert to make it look like a bridge.
 
   / Time for a new bridge - how to engineer? #40  
Dress up the ends of the culvert to make it look like a bridge.

That's a really interesting idea. Retaining wall block is pretty cheap and would cut way down on the fill required.
 

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