Subject:
|
Re: Long Span Suspension Bridge?
|
Newsgroups:
|
lugnet.trains
|
Date:
|
Wed, 23 Jan 2008 21:15:06 GMT
|
Viewed:
|
15195 times
|
| |
|
|
In lugnet.trains, Mike Gallagher wrote:
| |
,,
Total length 15ft (480 studs) , with one side of the deck over 12ft long. The
12ft length is just to long for cable stay. The bridge is too light for the
use. But if I added weight to the bridge deck, say $30+ of pennies across
deck it stabilized it. And when the very light trains went over it they did
not bow any of the deck.
.. Mike Gallagher
|
Mike-
The 192 stud (10 ft) cable-stayed bridged that I posted a picture of earlier in
this thread has a middle open span of 96 studs (5 ft). When we originally
designed it, we made the deck just 5 plates thick with the intention of having
the “cables” support the weight. We quickly determined that it was easier to
make the cables look cosmetically correct using bungee material (to take up
slack), but this proved impractical for supporting the thin deck. So we added a
truss under the deck so that even with twin heavy trains at random locations we
don’t get much deflection. Seems to work.
My next goal is a 384 stud (20 foot) suspension bridge with a 192 stud (10 foot)
middle section using real cable. The biggest problem I see is anchoring the ends
(cable stayed bridges have their advantages!).
-Ted
|
|
Message has 1 Reply:
 | | Re: Long Span Suspension Bridge?
|
| (...) Ted, Sorry, I can not stand it anymore. A 48 stud baseplate is 15" and a fraction. Two at 96 studs would be 30" and a fraction. Four at 192 studs would be 5 feet and a fraction. Therefore 384 studs would be ten feet 3/4 of an inch. Bruce (17 years ago, 23-Jan-08, to lugnet.trains, FTX)
|
Message is in Reply To:
| | Re: Long Span Suspension Bridge?
|
| (...) Well after reading your post one last time before I sent this I realized you wanted info on truss designs for a suspension bridge (like the Golden Gate) not a cable stay. But the second post threw me off due to the same problem I have had that (...) (17 years ago, 23-Jan-08, to lugnet.trains, FTX)
|
21 Messages in This Thread:
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
