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Author Topic: Part precast and part beams  (Read 3308 times)

roadman65

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Part precast and part beams
« on: November 21, 2020, 09:18:33 AM »

https://www.flickr.com/photos/54480415@N08/50624936826/

This is unusual for a bridge over a freeway to be supported by a precast span and the approach the conventional method.
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Sheryl Crowe

MCRoads

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Re: Part precast and part beams
« Reply #1 on: November 21, 2020, 04:01:21 PM »

Are you referring to any mixed beam type bridges? If so, 50th St over I-235 does the reverse, with precast beams on the approach and metal beams over the freeway.

There are also 2 examples at the junction of OK-75 and the Kilpatrick Turnpike.

Looking around for examples has actually given quite a few examples, so this type of arrangement seems pretty common.
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Tom958

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Re: Part precast and part beams
« Reply #2 on: November 22, 2020, 01:01:50 AM »

https://www.flickr.com/photos/54480415@N08/50624936826/

This is unusual for a bridge over a freeway to be supported by a precast span and the approach the conventional method.

No big deal. There's a cast-in-place box beam where unusually long spans are required due to a severe skew angle, and AASHTO beams everywhere else.
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Tom958

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Re: Part precast and part beams
« Reply #3 on: November 22, 2020, 01:05:31 AM »

Here's another way of dealing with the problem of spans too long for AASHTO beams: click me
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MCRoads

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Re: Part precast and part beams
« Reply #4 on: November 30, 2020, 01:58:22 AM »

Here's another way of dealing with the problem of spans too long for AASHTO beams: click me
I see your weird peir cap that looks ugly but also makes standard beam lengths possible over this span, and give you this monstrosity. it might have been cheaper to just build a really wide perpendicular bridge with the road only using part of the deck, like thjs.
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I build roads on Minecraft. Like, really good roads.
Interstates traveled:
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*/** indicates a terminus/termini being traveled
Indicates a gap (I.E Breezwood, PA.)

more room plz

Tom958

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Re: Part precast and part beams
« Reply #5 on: December 12, 2020, 04:44:03 PM »

it might have been cheaper to just build a really wide perpendicular bridge with the road only using part of the deck, like thjs.

I prefer the deck to be left open, like this. These are called pergolas.
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