tooldood Posted April 2, 2008 Share #1 Posted April 2, 2008 A Backhoe weighing 8 tons is on top of a flatbed trailer and 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 at 1 foot vertical spacing. Solve: When the shovel arm hits the overpass, how fast do you have to be going to slice the bridge in half?? (Assume no effect for headwind and no braking by the driver...) 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.? Yes, you can neglect friction. Link to comment Share on other sites More sharing options...
SaltyDawg Posted April 2, 2008 Share #2 Posted April 2, 2008 ouch!!! Link to comment Share on other sites More sharing options...
Eck Posted April 2, 2008 Share #3 Posted April 2, 2008 A Backhoe weighing 8 tons is on top of a flatbed trailer and 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 at 1 foot vertical spacing. Solve: When the shovel arm hits the overpass, how fast do you have to be going to slice the bridge in half?? (Assume no effect for headwind and no braking by the driver...) 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.? Yes, you can neglect friction. Need to know the exact width of the overpass to determine what the "half way point" is... Link to comment Share on other sites More sharing options...
Guest Swifty Posted April 2, 2008 Share #4 Posted April 2, 2008 I need to know when the concrete was poured, the average daily traffic flow over the bridge, the total tonnes of salt used on bridge surface since construction (if any), the number of freeze/thaw cycles in that climate zone, the tire pressure of each wheel on the flat bed and the tractor, the range (in centimeters) of each shock on the tractor and the flat bed, the tensil strength of chains and number of chains holding backhoe to flat bed, Link to comment Share on other sites More sharing options...
BuddyRich Posted April 2, 2008 Share #5 Posted April 2, 2008 I know, I know 65 mph and a 15 ft tall object going under a 13 foot tall object with a driver asleep at the wheel. At least he had it chained down good Link to comment Share on other sites More sharing options...
Guest Popeye Posted April 2, 2008 Share #6 Posted April 2, 2008 Is this one of those Mexican driver/rigs, that are now allowed to enter the U.S. & bypass the U.S. trucking station at the border under that new Fed law? Link to comment Share on other sites More sharing options...
utadventure Posted April 2, 2008 Share #7 Posted April 2, 2008 1.84 seconds, 4 ribs, 3 teeth and a nasty seatbelt bruise. Link to comment Share on other sites More sharing options...
bongobobny Posted April 2, 2008 Share #8 Posted April 2, 2008 Uhhhhh, pretty fast?? Link to comment Share on other sites More sharing options...
Redneck Posted April 2, 2008 Share #9 Posted April 2, 2008 A Backhoe weighing 8 tons is on top of a flatbed trailer and 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 at 1 foot vertical spacing. Solve: When the shovel arm hits the overpass, how fast do you have to be going to slice the bridge in half?? (Assume no effect for headwind and no braking by the driver...) 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.? Yes, you can neglect friction.First off that is not a backhoe that is an excavator that weighs about 40k. the trailer is a 3 axle removable neck double drop rgn lowboy weighing in at about 20k. Assuming the truck was a 3 axle weighing 18k. he hit the bridge at 68.6 mph and came to a complete stop in2.3 seconds then the drier spent 7 hours removing the seat from his or her rectum. Link to comment Share on other sites More sharing options...
Guest RoyalChuter Posted April 2, 2008 Share #10 Posted April 2, 2008 Is this one of those Mexican driver/rigs, that are now allowed to enter the U.S. & bypass the U.S. trucking station at the border under that new Fed law? No, this set of photos is several years old, so it pre-dates that law. Link to comment Share on other sites More sharing options...
Kurt Posted April 3, 2008 Share #11 Posted April 3, 2008 Looks to me like someone bought a bridge. Link to comment Share on other sites More sharing options...
IH Truck Guy Posted April 3, 2008 Share #12 Posted April 3, 2008 No, this set of photos is several years old, so it pre-dates that law. This is true..My buddy who still does heavy haul came upon this wreck and took these pics.The driver was in his late 20's and was bootlegging the excavator.That means he was hauling it without buying any permits..... I'd be willing to bet he won't do this again. Link to comment Share on other sites More sharing options...
flb_78 Posted April 3, 2008 Share #13 Posted April 3, 2008 Whoops... Link to comment Share on other sites More sharing options...
Steve S Posted April 3, 2008 Share #14 Posted April 3, 2008 It looks to me that the driver was going the speed of TOTAL STUPIDITY:bang head::bang head: DRIVE SAFE.. Link to comment Share on other sites More sharing options...
Animal Posted April 3, 2008 Share #15 Posted April 3, 2008 Now there is going to be one highly perturbed GECKO !!!!!!!:rotf::rotf::rotf::rotf: Link to comment Share on other sites More sharing options...
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