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Results tagged with bridges
Search options questions only
not deleted
user 374
20
votes
2
answers
3k
views
Why are earthfills fully covered in concrete where they join bridges?
This photo is of a 20+ meters high earthfill and lower earthfills' slopes are usually not covered in concrete at all except where they join bridges - the join is usually fully covered regardless of how …
- 2,099
5
votes
3
answers
7k
views
Why design a cable stayed bridge with pylons inclined towards the obstacle being spanned?
The usual strategy of building cable stayed bridges is that you first build the pylons and temporary supports, then assemble the deck on those supports, then mount the cables, then remove the temporary …
- 2,099
11
votes
3
answers
5k
views
Why would a bearing plate that further concentrates load onto small surface be used?
Here's a photo of a bearing plate where a bridge reinforced concrete beam meets the earthfill
The bridge span is about 20 meters long and consists of two reinforced concrete beams each resting on t …
- 2,099
5
votes
1
answer
206
views
Why is this box girder made of lattice on one side only?
Here's a zoomed piece of this image from Wikipedia
That's a close-up of a tower holding a railroad bridge. A and B are two of the four columns in the tower's corners. I assume that they are placed …
- 2,099
4
votes
3
answers
1k
views
Why would a column expand before accepting load through a narrow thunk?
Here's a column top which holds a driveway overbridge.
The column is a reinforced concrete cylinder with an inverse truncated cone on top - so it expands sideways at its top. The column top holds s …
- 2,099