Return to the Hypertufa Forum | Post a Follow-Up

 o
footbridge

Posted by mimi_stpaul z4Mn (My Page) on
Mon, Aug 22, 05 at 20:08

I was reading the WaterGardening forum today. A beautiful footbridge was made out of concrete. I wonder if something like this could be made out of hypertufa, and if so would it be strong enough to walk on??? Please check it out under the footbridge question. BTW he has some other really beautiful items, actually the whole garden is so outstanding it needs to be in a magazine.( sorry about not putting on a link but am VERY computer illiterate)


Follow-Up Postings:

 o
RE: footbridge

The link to his page is http://koi-z-are-us.20m.com/bridge_of_the_four_seasons.htm


 o
RE: footbridge

Small bridges are easy to make.
If you want to make the type that curves over the water go to an auto wrecker and get four heavy truck leaf springs.
Get them welded together in pairs that reach from side to side of your pond.
Rest the ends on buried concrete footings.
Now you have two curved steel bars over your pond.
What you attach to the top of those is up to you and your imagination.
I used cedar planks completely hiding the steel springs making the bridge appear suspended in the air.
It was cool.
Last time I saw it it was 12 years old and still perfect.

There is no reason that with a sheet of wire mesh and some rebar you couldn't deck these springs with a thick tufa.
If the ends are fastened on firm footings the springs will support tons without moving.


 o
RE: footbridge

Mimi, I would not attempt to create a tufa bridge, especially in your zone. Been to St. Paul and it is an ice block in the winter! Tufa is not as strong as concrete, but I do think that tufa reacts to freeze thaw alot better then concrete. Even so, tufa wears down with just walking on it. I made a stepping stone and placed it at a week long art show where it would receive alot of traffic. You should see what happened to it. Lets say there is no top pattern left!

Jo


 o
RE: footbridge

Hi Jo
I disagree and I'm the most paranoid guy here when it comes to avoiding freeze thaw damage.
An arched bridge of strong tufa would allow constant runoff for melting ice. If the top is sealed with a good zylene concrete sealer even surface damage could be avoided.
Also natural wear on tufa can be very attractive.
And if you don't like the wear top coating with a 1/2 layer of new tufa is a very easy thing to do.

A tufa bridge would require no more maintanance than a wood bridge, and probably less.

And built on top of truck leaf springs it would be easy to do.


 o
RE: footbridge

Mimi-

Why couldn't you make the side supports out of tufa/concrete, shaping them to resemble boulders or whatever strikes your fancy, leaving a shelf of sorts on either side to hold the area that would get the most wear. Placing wooden planks down the middle where the foot traffic would be greatest would take care of the drainage problem and the planks could be replaced as need be.

It's a thought.

Jo


 o
RE: footbridge

Thanks for all your input. Tufaenough, I had to google for truck leafs, I had no idea what they were. But i must say that is a brilliant idea. Do I need to get "matching" leaf springs or are they all standard sized? I do agree with you about freeze thaw. If cement is properly enforced it should be fine and sealing it would make it wear evn better. The bridge would get VERY LITTLE traffic so that doesn't concern me much. I do really like the idea of of wood planks, Jo. I think it would add a lot of interest to it. Well, off to the auto graveyard for me (then to see Papa to do some welding) thanks so much. If all is well I will post pics :+)


 o
RE: footbridge

Hi Mimi
Those springs come in all lengths and widths. Just figure out how long you span is and choose accordingly. They should be really cheap. If you are going over 8 feet you might need 3 on each side.
You can use a couple lengths of steel as well but springs already have the curve and they usually have hundreds just laying around at the wreckers.
Good luck!


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Hypertufa Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here