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Author Topic: Part precast and part beams  (Read 179 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

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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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