(03-15-2018 07:22 PM)TechRocks Wrote:  

(03-15-2018 05:38 PM)HeartOfDixie Wrote:  Any word on the cause?

Gravity.

actually, it appears it was too much tension that caused fracturing......then yeah, gravity....

the latest report is the crew was instructed to increase tightening that led to the failure.....

if that's the case, that engineering firm is going out of business in the not too distant future....

It just seems to be way too large IMO for a pedestrian bridge (950 tons). I realize it was stretching eventually over the water canal but compare it to the existing pedestrian bridge in the background of this photo.

Is it common practice to have a stress test on something like this being built while cars are traveling underneath it?

(03-16-2018 06:23 AM)Fort Bend Owl Wrote:  

It just seems to be way too large IMO for a pedestrian bridge (950 tons). I realize it was stretching eventually over the water canal but compare it to the existing pedestrian bridge in the background of this photo.

Is it common practice to have a stress test on something like this being built while cars are traveling underneath it?

that would be a prestress (material) issue....however, the engineers should be well aware of factor of safety relative to tension/amt of support cables req'd....

common sense should dictate that traffic should have been rerouted during installation....that's a fk'n gimme putt.....

there's all kinds of blame that is getting ready to shuffled.....

(03-16-2018 06:14 AM)stinkfist Wrote:  

(03-15-2018 07:22 PM)TechRocks Wrote:  

(03-15-2018 05:38 PM)HeartOfDixie Wrote:  Any word on the cause?

Gravity.

actually, it appears it was too much tension that caused fracturing......then yeah, gravity....

the latest report is the crew was instructed to increase tightening that led to the failure.....

if that's the case, that engineering firm is going out of business in the not too distant future....

It was good that they were testing and attempting to repair.

It was very bad that they did not take the proper safety precautions prior to doing so ( closing the road, making sure workers and pedestrians were clear, etc).

(03-16-2018 06:54 AM)bearcatfan Wrote:  

(03-16-2018 06:14 AM)stinkfist Wrote:  

(03-15-2018 07:22 PM)TechRocks Wrote:  

(03-15-2018 05:38 PM)HeartOfDixie Wrote:  Any word on the cause?

Gravity.

actually, it appears it was too much tension that caused fracturing......then yeah, gravity....

the latest report is the crew was instructed to increase tightening that led to the failure.....

if that's the case, that engineering firm is going out of business in the not too distant future....

It was good that they were testing and attempting to repair.

It was very bad that they did not take the proper safety precautions prior to doing so ( closing the road, making sure workers and pedestrians were clear, etc).

I don't disagree.....that's what's so shocking about the latter.....

how you don't detour traffic/restrict pedestrians is beyond my ability to comprehend........that's as stupid and negligible as it gets....

(03-16-2018 07:01 AM)stinkfist Wrote:  

(03-16-2018 06:54 AM)bearcatfan Wrote:  

(03-16-2018 06:14 AM)stinkfist Wrote:  

(03-15-2018 07:22 PM)TechRocks Wrote:  

(03-15-2018 05:38 PM)HeartOfDixie Wrote:  Any word on the cause?

Gravity.

actually, it appears it was too much tension that caused fracturing......then yeah, gravity....

the latest report is the crew was instructed to increase tightening that led to the failure.....

if that's the case, that engineering firm is going out of business in the not too distant future....

It was good that they were testing and attempting to repair.

It was very bad that they did not take the proper safety precautions prior to doing so ( closing the road, making sure workers and pedestrians were clear, etc).

I don't disagree.....that's what's so shocking about the latter.....

how you don't detour traffic/restrict pedestrians is beyond my ability to comprehend........that's as stupid and negligible as it gets....

From everything I've read is was an accelerated bridge construction, a fairly new technology promoted by FIU, that was designed to minimize road closures. It makes me wonder if the contractor and engineer were pushed to complete the stress testing without closing the road in order to promote this construction method.

(03-16-2018 06:23 AM)Fort Bend Owl Wrote:  

It just seems to be way too large IMO for a pedestrian bridge (950 tons). I realize it was stretching eventually over the water canal but compare it to the existing pedestrian bridge in the background of this photo.

Is it common practice to have a stress test on something like this being built while cars are traveling underneath it?

Accelerated Bridge Construction

Apparently it's relatively new process and they're using the same process in Memphis right now.

And it seems the company that raised the bridge in place is based in Memphis.

TDOT using same construction technique as collapsed Florida bridge

Quote:In a TDOT video, they explain the Accelerated Bridge Construction process, a relatively new technique used to replace bridges without disrupting traffic during construction. The new bridge parts get constructed near the current bridge site. Then, according to the video, "the super structure of the existing bridges will be demolished and carried away. Transport trucks will carry the pieces to the bridge site where cranes will set the new structure into place... By using accelerated bridge construction, TDOT will deliver results quickly.”

Quote:TDOT already completed a project using ABC in Nashville 2015.

Quote:Memphis-based company Barnart also had a hand in the Florida bridge ABC construction.

The company released this statement: "Barnhart Crane and Rigging is saddened by the news of the tragedy that occurred in Miami with the collapse of the Florida International University pedestrian bridge. Barnhart was contracted to move the bridge into place and was not involved with the design or construction of the bridge. Our scope of work was completed without incident and according to all technical requirements. Barnhart crews and equipment were not on site at the time of the incident. We will fully cooperate with authorities as they investigate the cause of the collapse. Our thoughts and prayers are with those affected by this tragic event."

I'm curious as to why the engineering firm felt that testing which could conceivably lead to failure would be done while traffic was still running under it was a good idea.

(03-16-2018 08:46 AM)RobUCF Wrote:  

(03-16-2018 07:01 AM)stinkfist Wrote:  

(03-16-2018 06:54 AM)bearcatfan Wrote:  

(03-16-2018 06:14 AM)stinkfist Wrote:  

(03-15-2018 07:22 PM)TechRocks Wrote:  Gravity.

actually, it appears it was too much tension that caused fracturing......then yeah, gravity....

the latest report is the crew was instructed to increase tightening that led to the failure.....

if that's the case, that engineering firm is going out of business in the not too distant future....

It was good that they were testing and attempting to repair.

It was very bad that they did not take the proper safety precautions prior to doing so ( closing the road, making sure workers and pedestrians were clear, etc).

I don't disagree.....that's what's so shocking about the latter.....

how you don't detour traffic/restrict pedestrians is beyond my ability to comprehend........that's as stupid and negligible as it gets....

From everything I've read is was an accelerated bridge construction, a fairly new technology promoted by FIU, that was designed to minimize road closures. It makes me wonder if the contractor and engineer were pushed to complete the stress testing without closing the road in order to promote this construction method.

You probably hit the nail on the head right there.

(03-16-2018 06:23 AM)Fort Bend Owl Wrote:  

It just seems to be way too large IMO for a pedestrian bridge (950 tons). I realize it was stretching eventually over the water canal but compare it to the existing pedestrian bridge in the background of this photo.

Is it common practice to have a stress test on something like this being built while cars are traveling underneath it?

I read the original article and, looking at the photo, was trying to understand how they were getting 320 feet of span on that sucker. Just didn't look right. Now I see from your post that it was to eventually span the canal as well so that makes more sense.

(03-16-2018 10:00 AM)HeartOfDixie Wrote:  I'm curious as to why the engineering firm felt that testing which could conceivably lead to failure would be done while traffic was still running under it was a good idea.

guess what isn't going to happen again....

there are some engineers/project managers that will standing in the chow line very soon.....and deservedly so.....

this is inexcusable from that perspective....

(03-16-2018 10:16 AM)NIU007 Wrote:  

(03-16-2018 08:46 AM)RobUCF Wrote:  

(03-16-2018 07:01 AM)stinkfist Wrote:  

(03-16-2018 06:54 AM)bearcatfan Wrote:  

(03-16-2018 06:14 AM)stinkfist Wrote:  actually, it appears it was too much tension that caused fracturing......then yeah, gravity....

the latest report is the crew was instructed to increase tightening that led to the failure.....

if that's the case, that engineering firm is going out of business in the not too distant future....

It was good that they were testing and attempting to repair.

It was very bad that they did not take the proper safety precautions prior to doing so ( closing the road, making sure workers and pedestrians were clear, etc).

I don't disagree.....that's what's so shocking about the latter.....

how you don't detour traffic/restrict pedestrians is beyond my ability to comprehend........that's as stupid and negligible as it gets....

From everything I've read is was an accelerated bridge construction, a fairly new technology promoted by FIU, that was designed to minimize road closures. It makes me wonder if the contractor and engineer were pushed to complete the stress testing without closing the road in order to promote this construction method.

You probably hit the nail on the head right there.

easily plausible.....

if true, whoever signed off on it is smother, covered, and motherfuxxored.....

many a head is going to roll once the investigation is completed.....

(03-16-2018 10:44 AM)stinkfist Wrote:  

(03-16-2018 10:16 AM)NIU007 Wrote:  

(03-16-2018 08:46 AM)RobUCF Wrote:  

(03-16-2018 07:01 AM)stinkfist Wrote:  

(03-16-2018 06:54 AM)bearcatfan Wrote:  It was good that they were testing and attempting to repair.

It was very bad that they did not take the proper safety precautions prior to doing so ( closing the road, making sure workers and pedestrians were clear, etc).

I don't disagree.....that's what's so shocking about the latter.....

how you don't detour traffic/restrict pedestrians is beyond my ability to comprehend........that's as stupid and negligible as it gets....

From everything I've read is was an accelerated bridge construction, a fairly new technology promoted by FIU, that was designed to minimize road closures. It makes me wonder if the contractor and engineer were pushed to complete the stress testing without closing the road in order to promote this construction method.

You probably hit the nail on the head right there.

easily plausible.....

if true, whoever signed off on it is smother, covered, and motherfuxxored.....

many a head is going to roll once the investigation is completed.....

standards lowered to the point of failure

(03-16-2018 11:46 AM)shere khan Wrote:  

(03-16-2018 10:44 AM)stinkfist Wrote:  

(03-16-2018 10:16 AM)NIU007 Wrote:  

(03-16-2018 08:46 AM)RobUCF Wrote:  

(03-16-2018 07:01 AM)stinkfist Wrote:  I don't disagree.....that's what's so shocking about the latter.....

how you don't detour traffic/restrict pedestrians is beyond my ability to comprehend........that's as stupid and negligible as it gets....

From everything I've read is was an accelerated bridge construction, a fairly new technology promoted by FIU, that was designed to minimize road closures. It makes me wonder if the contractor and engineer were pushed to complete the stress testing without closing the road in order to promote this construction method.

You probably hit the nail on the head right there.

easily plausible.....

if true, whoever signed off on it is smother, covered, and motherfuxxored.....

many a head is going to roll once the investigation is completed.....

standards lowered to the point of failure

which is easily plausible too....

I touched on that when china drove up steel/Al pricing ~15 yrs ago and was tasked to remove another 10% material costs out of our product.......I flat out told them they were fokking out of their minds after how I redesigned our product in the last handful of years....

it was truly, "hey guys, do you understand neg/pos pressure, that 18 ga. is now the new 16 ga., and we have to ship this shite over rough terrain??? how about tacking on a surcharge you dipshite coat and tie biatches"

at some point, you just have to tell 'em to fockall....those were actually the times the sadist in me got to enjoy during my corpshite 'murica days....

(03-16-2018 12:19 PM)stinkfist Wrote:  

(03-16-2018 11:46 AM)shere khan Wrote:  

(03-16-2018 10:44 AM)stinkfist Wrote:  

(03-16-2018 10:16 AM)NIU007 Wrote:  

(03-16-2018 08:46 AM)RobUCF Wrote:  From everything I've read is was an accelerated bridge construction, a fairly new technology promoted by FIU, that was designed to minimize road closures. It makes me wonder if the contractor and engineer were pushed to complete the stress testing without closing the road in order to promote this construction method.

You probably hit the nail on the head right there.

easily plausible.....

if true, whoever signed off on it is smother, covered, and motherfuxxored.....

many a head is going to roll once the investigation is completed.....

standards lowered to the point of failure

which is easily plausible too....

I touched on that when china drove up steel/Al pricing ~15 yrs ago and was tasked to remove another 10% material costs out of our product.......I flat out told them they were fokking out of their minds after how I redesigned our product in the last handful of years....

it was truly, "hey guys, do you understand neg/pos pressure, that 18 ga. is now the new 16 ga., and we have to ship this shite over rough terrain??? how about tacking on a surcharge you dipshite coat and tie biatches"

at some point, you just have to tell 'em to fockall....those were actually the times the sadist in me got to enjoy during my corpshite 'murica days....

thats when you are tested and you are the most valuable.