any info on bridge building

[drlewis]

need to build a bridge about 20 ft long over seasonal stream.have lots of hemlock trees that are close .plan to run log trucks over it, any info or pictures. thanks

[OntarioAl]

drlewis
Your location would go a long way to providing you with the information you require.
Different jurisdictions (state/province/federal) have different regulations for temporary logging purpose bridges.
Al

[Straightgrain]

If there comes a time when you have to "think outside the box" (and not "color outside the lines")....come back to this post and consider a temporary bridge.

Temporary bridges are engineered and can also "span" EPA and other local regulations very well.

Perhaps the nearest National Guard unit would jump at the opportunity to employ one of their Armored Vehicle Landing Bridges (AVLB); leave it there for you and recover it when you are done.

[sawguy21]

A lot more is involved than just dropping poles across a stream. Take into account the span, soil conditions on both sides of the stream, disturbing wild life habitat etc. This might be a place to start.
http://www.fpl.fs.fed.us/documnts/misc/em7700_8_chapter02.pdf

[Jamie_C]

If you happen to be in Canada then you will fall under Dept of Environment, will need to take a course on water crossings, get permits, use approved materials and a list of other stuff. They classify anything in place for over 30 days as a permanent bridge and that's another whole list of rules

[beenthere]

I think he is in Raymond, NH.  Imagine NH has some hurdles to jump when it comes to "jumping" streams.

[loggah]

If you go to the U.S.F.S. website im sure they have some pictures and specs, my father and i built quite a few different temporary truck bridges on different forest service sales years back,we basically followed their plans ,abutments,  hemlock stringers ,each time changing the tree direction ,butt ahead,top ahead,the full width of the bridge,16" dia. trees. then chainsaw the tops so they are  all the same height,basically flat. Then we had a bunch of 3" thick planking  which we spiked across the whole bridge ,then using 3" planking again run a couple  basically 2' wide runners across the bridge where the truck will travel. we also had to cable two logs on each edge of the bridge,the cables going down thru the deck and around the outside stringer to  help hold the load and create a  bumper log on each side. We should have taken pictures but we were busy logging in those days.I still have the letter sent to my dad from the forest supervisor on the quality of the bridgework.i hope you can figure out my explaination!! ;D ;D Don

[drlewis]

i did a bridge like don said about 25 years ago, 25 foot long with 24 in oak logs and 4 in hemlock planks then did  where the  wheel s run with more 4 in. we ran triaxles and trailers for a long time over it . it was a 150 ac, lot .this one is 40. just looking diff. way . thanks

[treeslayer2003]

this is how we do it here.........not sure if i'd run a loaded truck over it.


 







crane matts
i had this photo here, i can't seem to upload any new pics any where

[jdeere540a]

probably your best bet is like loggah said check out the usfs web site and look into state laws for temporary crossings and bridges i'm pretty sure you need a permit to build a truck bridge
 

[beenthere]

BMP (Best Management Practices) likely to be followed for temporary bridge while logging.

Here is a document for NH

http://des.nh.gov/organization/divisions/water/wetlands/documents/timber_harvesting.pdf

[woodmills1]

Pretty sure there is a UNH document on 2x10 laminated bridges.  Also the northen logger had an article on how to.

[tmbrcruiser]

Every state has BMP's that must be followed to build a stream crossing. On the Delmarva peninsula the forest are drained by natural streams and tax ditches. Tax ditches are normally less than 20' bank to bank. I cross streams and ditches as a normal course of business with oak timber mats. Mats are 8" or 12" x 48" x 24' or 30' oak timbers (bolted together with steel rods). Very quick to set with skidder or knuckle boom loader. I have two jobs at this time crossing ditches with loaded trucks on mats. Guess I should learn how to post pictures.

[Logger003]

We used to use a 40 foot flat deck trailer. We would pull the running gear out of it and pull it across the water way with a skidder. When we were done we would pull it back across bolt the running gear back on and save it till the next time we needed it

[Fundyheather]

https://www.forestrytas.com.au/assets/0000/0173/tasforests11_part_6.pdf

jim

[treeslayer2003]

Every state has BMP's that must be followed to build a stream crossing. On the Delmarva peninsula the forest are drained by natural streams and tax ditches. Tax ditches are normally less than 20' bank to bank. I cross streams and ditches as a normal course of business with oak timber mats. Mats are 8" or 12" x 48" x 24' or 30' oak timbers (bolted together with steel rods). Very quick to set with skidder or knuckle boom loader. I have two jobs at this time crossing ditches with loaded trucks on mats. Guess I should learn how to post pictures.

hello.......we have to be close, this place ain't big lol.

[tmbrcruiser]

Hello Treeslayer! Your right the place ain't so big. I live in Sussex County but work in all of the counties on the shore.

[treeslayer2003]

Hello Treeslayer! Your right the place ain't so big. I live in Sussex County but work in all of the counties on the shore.

heck we are just a stones throw away. i'm in northern dorchester almost in caroline. i sent you a PM