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Building a bridge

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Building a bridge

#1

Building a bridge

Bill Tindall, E.Tn.

What has started may be the largest most expenisve project every posted on WoodCentral, reconstruction of a 273' ridge over the Holston River to become a bike/hike path.


145 replacement ties arrive from Michigan. Bridge ties that go on steel bridges are a unique size- 10' x 8" x10".



Step 1 is to remove the old ties and paint the surfaces that will be covered by the ties with bridge paint, a two part epoxy loaded with aluminum- $86 a gallon. We don't have the money to paint the whole bridge at this time, cost estimate $200,000.

Step 2 is to put a partial deck on this section. This step is in suspension because the lumber has not been delivered.

At the side is a pedestrian suspension bridge, a relic of a past era. Decades ago the Virginia Department of Transportation put pedestrian bridges over this river in many places to enable land owners to access their cabins on the other side. VDOT is committed to maintain these bridges so long as someone says they need them. We hope to keep this bridge functional as a part of the Trail. Many others have been abandoned.

Re: Building a bridge

#2

Re: Building a bridge

Steve D, CT

That pedestrian bridge looks pretty wild.

Will those ties be sanded or planed?

Re: Building a bridge

#3

Cool project

Henry (Raleigh NC)

We've been following your updates on design etc on this for awhile - good to see real stuff happening. Looking forward to updates.

To follow up on Steve's query about ties being sanded or planed, can you describe the process of how you might be staining these? :D 8) :(

Henry

Re: Building a bridge

#4

Re: Building a bridge

David Weaver

Is it possible for your group to creosote the ties, has that been done already, or are they being preserved by other means?

What happens with the old ties? (presumably those were creosoted). Does the treatment require any special disposal for the old ones?

Re: Building a bridge

#5

Re: Building a bridge

Bill Tindall, E.Tn.

A deck goes on them as you will see as the project unfolds. Lumber is due on site they week.

Re: Building a bridge

#6

staining the wood

Bill Tindall, E.Tn.

describe the process of how you might be staining these? No, the ties will not be stained. Rather, taking a note from the Hand Tool Restorers the ties come to us Japanned as you can see from their blackness in the picture. No further finishing necessary ;)

Re: Building a bridge

#7

Re: Building a bridge

Bill Tindall, E.Tn.

There are numerous places that treat ties with creosote. It is a high temperature combination of vacuum and pressure to put about 25 pounds of creosote in the tie.

We have permission from State to use the old ties for landscaping the trail or construction of retaining walls, etc.

Re: Building a bridge

#8

Re: staining the wood

Steve D, CT

You'll want to strip the japanning and re-spray with Dupli-color engine paint.

I read it on the internet... :b

Re: Building a bridge

#9

Congratulations Bill!!!

Wiley Horne

This has been an arduous slog to get to this point. Let alone what is to come.

A remarkable display of community spirit and resourcefulness—and money raising.

Wiley

Re: Building a bridge

#10

Re: Building a bridge

walta

Was your lumber pricing locked in of will the changes blow your budget?

Walt

Re: Building a bridge

#11

Lumber prices

Bill Tindall, E.Tn.

We purchased when prices were only twice what they were last November, which were 3X what they were a year before. Labor for this bridge is nearly 10X the lumber cost so I am focusing on labor saving more than fretting about the lumber.


Re: Building a bridge

#12

Re: Lumber prices

Bruce, a MN Galoot

Shamelessly lifted from another forum:


Re: Building a bridge

#13

cryptic wood currency

John K Jordan

Ha! I guess the stash of about 30 sheets of 3/4" and 1/2" plywood I just found in the back room of my shop is like money in the bank. I had stored it in a spot I rarely look at and forgot all about it. Includes a few 5x5 sheets of baltic birch too. There's more in the barn loft and a storage building. (I always bought more than I needed "just in case".)

JKJ

Re: Building a bridge

#15

I had a relative...

David Weaver

..who had a hot dip tank (this was a private enterprise - no vacuum - just heat creosote and dip things in it to kill bugs and preserve the wood).

As I recall, it became hard to get privately around 1990 or so and he stretched it by mixing it with fuel oil for a while and then I guess stopped.

I was curious about the wood as I don't think I'd want to bury it near food production, but maybe it wouldn't make a real difference. What's more curious is that it's definitely not on the allowable burn list here, and I don't know how creosote was made industrially, but there's no shortage of it on low stack temp stoves that were popular in the 1970s (same relative had two pyrex glasses at the ends of a horizontal stove pipe run and caught and kept the drip. He was eccentric and curious). The curious part about not burning it being interesting only because at least in some cases, it's the product of combustion.

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