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Engineering Problem ...
#124395 09/27/06 02:58 PM
Joined: Oct 2000
Posts: 3,669
Likes: 4
NY, USA
Admin Offline OP
Administrator
Member
forwarded by email today:
(original source unknown)
Quote
Problem: A backhoe weighing 8 tons is on top of a flatbed trailer heading east on Interstate 70 near Hays, Kansas ? The extended shovel arm is made of hardened refined steel and the approaching overpass is made of commercial-grade concrete, reinforced with 1 1/2 inch steel rebar spaced at ?6 inch intervals in a criss-cross pattern layered with 1 foot vertical spacing.

Solve: ? When the shovel arm hits the overpass, how fast does the trailer with the backhoe have to be going to slice the bridge in half?? (Assume no headwind and no braking by the driver who is oblivious of the situation . . . )

Extra Credit: Solve for the time and distance required for the entire rig to come to a complete stop after hitting the overpass at the speed calculated above .
?
Answer: Scroll down..........
[Linked Image]

[Linked Image]

[Linked Image]
Quote
Answer -? ? It doesn't really matter... ? The point is that the trucking company just bought themselves a bridge...
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Re: Engineering Problem ...
#124396 09/27/06 05:32 PM
Joined: Jan 2006
Posts: 558
Hamilton, Ontario, Canada
R
Rewired Offline
Member
THAT would have been something I would have LOVED to have seen! ( from a safe distance of course).
I would not believe it if I didn't see it!

A.D
Re: Engineering Problem ...
#124397 09/27/06 05:47 PM
Joined: Dec 2004
Posts: 1,064
nowhere usa
D
Dnkldorf Offline
Member
Ah, a little duct tape and it'll be fine....


That is a funny post..
Re: Engineering Problem ...
#124398 09/27/06 05:57 PM
Joined: Apr 2004
Posts: 812
Levittown, PA
Theelectrikid Offline
Member
ROTFLMAO!! Must be an idiot to do that!

Ian A.

Is there anyone on board who knows how to fly a plane?
Re: Engineering Problem ...
#124399 09/27/06 06:30 PM
Joined: Jul 2002
Posts: 680
Bangor Me. USA
W
walrus Offline
Member
Can you say photoshop
Re: Engineering Problem ...
#124400 09/27/06 06:33 PM
Joined: Nov 2002
Posts: 456
C
classicsat Offline
Member
"I was delivering this overpass and ran out of gas"
Re: Engineering Problem ...
#124401 09/27/06 07:17 PM
Joined: Aug 2005
Posts: 24
Los Angeles, CA
G
Gus99 Offline
Member
They repaired the railing on both sides pretty quick didn't they!

FAKE
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Re: Engineering Problem ...
#124402 09/27/06 07:21 PM
Joined: Sep 2001
Posts: 806
Bergen County, NJ
N
NJwirenut Offline
Member
Not a fake:
http://www.snopes.com/photos/accident/hoecrash.asp

Here's a news report:
http://www2.ljworld.com/news/2006/feb/15/accident_near_hays_closes_interstate/



[This message has been edited by NJwirenut (edited 09-27-2006).]
Re: Engineering Problem ...
#124403 09/27/06 07:36 PM
Joined: Mar 2005
Posts: 169
west springfield,mass
S
steve ancient apprentice Offline
Member
Even with my bi-focals I could see a sign as to how high the bridge is. Trueley Amazing.
Re: Engineering Problem ...
#124404 09/27/06 07:54 PM
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
I
iwire Offline
Moderator
NJ thanks for providing the links. [Linked Image]

I also thought I would point out that this is a type of hollow concrete box bridge.

It is not 3' or 4' of solid concrete, it is a couple of 10" to 14" decks.

Still amazing but much more believable that slicing a solid concrete bridge.

Zoom in on the first picture where you can see the bucket has punched a hole through the bottom deck in to the void.

Bob Badger
Construction & Maintenance Electrician
Massachusetts
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