Bridges?

Ken Barley wrote in post #19505500
Straddling the Greenwich Meridian
Two superb bridges over the A14 just over two miles apart.
One is in the Western Hemisphere; the other in the East.

In the east we have the Bar Hill Bridge

IMAGE LINK: https://www.flickr.com …/album-72157718464750528/
Bar Hill Bridge, A14, Cambridgeshire] by Ken Barley on Flickr

In the west

IMAGE LINK: https://www.flickr.com …/album-72157718464750528/
Swavesey Bridge, A14, Cambridgeshire] by Ken Barley on Flickr


The A frames tell the bridges apart
Bar Hill has the frames ALONG the bridge; Swavesey has the frames ACROSS the bridge.
Apparently so that motorists can tell them apart...

Excellent pictures of a beautiful bridge!!

Welcome to POTN Ken Barley!!

American Bridge Company ABT style swinging counterweight railroad bridge.
built in 1931. abandoned in place, and raised in 1975.
one of six built in this style in the US

Great Bridge!
Where?
Was it water powered? Assume the tank was a counterweight and filled with water.
Was the default up or down?

Ken Barley wrote in post #19505848
Great Bridge!
Where?
Was it water powered? Assume the tank was a counterweight and filled with water.
Was the default up or down?

Port Huron Michigan across the Black River at the mouth of the St. Clair River.

no it was electrically operated with a pair of big motors, one on each side.

the counterweight (still in place) is filled with cement. its going to be a real bear for them to remove that. i cant imagine how much it weighs! several hundred tons id bet.

i dont know that there's a default setting for it. it was in the up position for 53 years.

here's a picture of the bridge down

That's great. Thanks for the information.

Ltdave wrote in post #19505907
Port Huron Michigan across the Black River at the mouth of the St. Clair River.

no it was electrically operated with a pair of big motors, one on each side.

the counterweight (still in place) is filled with cement. its going to be a real bear for them to remove that. i cant imagine how much it weighs! several hundred tons id bet.

i dont know that there's a default setting for it. it was in the up position for 53 years.

here's a picture of the bridge down

Hosted photo: posted by Ltdave in
./showthread.php?p=195​05907&i=i265614575
forum: Architecture, Real-Estate & Buildings

description of the parts

Hosted photo: posted by Ltdave in
./showthread.php?p=195​05907&i=i107830303
forum: Architecture, Real-Estate & Buildings

Excellent job labeling the sections.

dangermoney wrote in post #19506034
Excellent job labeling the sections.

stole the picture from the interwebs.

credit is given in the bottom corners

Ltdave wrote in post #19505907
Port Huron Michigan across the Black River at the mouth of the St. Clair River.

no it was electrically operated with a pair of big motors, one on each side.

the counterweight (still in place) is filled with cement. its going to be a real bear for them to remove that. i cant imagine how much it weighs! several hundred tons id bet.

i dont know that there's a default setting for it. it was in the up position for 53 years.

here's a picture of the bridge down

Hosted photo: posted by Ltdave in
./showthread.php?p=195​05907&i=i265614575
forum: Architecture, Real-Estate & Buildings

description of the parts

Hosted photo: posted by Ltdave in
./showthread.php?p=195​05907&i=i107830303
forum: Architecture, Real-Estate & Buildings

Interesting! However, it seems over-complicated to me

Pegasus Bridge

Another "over complicated" bridge.

See here for a further explanation: https://en.wikipedia.o​rg/wiki/Pegasus_Bridge

IMAGE LINK: https://flic.kr/p/JDKf​fd

griffljg wrote in post #19507387
Pegasus Bridge

Another "over complicated" bridge.

See here for a further explanation: https://en.wikipedia.o​rg/wiki/Pegasus_Bridge

IMAGE LINK: https://flic.kr/p/JDKf​fd
Pegasus Bridge by Laurence Griffiths, on Flickr

No, much simpler! Only one moving part if I understand it correctly

Piet ZA wrote in post #19507403
No, much simpler! Only one moving part if I understand it correctly

It is indeed a lot more simple Piet and very impressive in operation.

It isn't the original bridge. That was in such bad repair that it was removed and was rotting in the field just behind where the photo was taken. Then the museum was opened in June 2000 and the bridge was moved into the museum grounds. We were lucky enough to be stopping in the camp/caravan site about ½ mile away from the bridge just 2 weeks after the museum opened and learned quite a lot from the new staff.

https://en.wikipedia.o​rg/wiki/Pegasus_Bridge

Imperial Bridge, Vienna, Austria.

hef