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Had a shower thought this morning, what happened to rollbars?

Discussion in 'General Tacoma Talk' started by tyoung, Oct 10, 2023.

  1. Oct 10, 2023 at 11:50 AM
    #21
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    Roll bars are not needed due to numerous vehicle safety improvements and Federal roof crush safety standards implemented in 2013, making roll bars unnecessary. Often they were used as a light platform, and now there are many more options with the smaller form factor of LED lamps.

    You can read all the info from IIHS below.

    From IIHS
    https://www.iihs.org/ratings/about-our-tests

    Roof strength test
    Deaths in rollovers have declined dramatically in recent decades. A major reason is electronic stability control, which helps prevent many rollover crashes, particularly single-vehicle ones, from occurring in the first place. Roofs designed to perform well in the IIHS roof strength test, conducted from 2009 to 2022, have also helped mitigate rollovers when they do occur.

    We discontinued the roof strength test because virtually all vehicles were earning good ratings, and an updated federal standard phased in between 2013 and 2017 was similar to our requirements for a good rating.

    Why does roof strength matter? When vehicles roll, seat belts and side curtain airbags help protect the people inside. However, for these safety technologies to be most effective, the roof must be able to maintain the occupant survival space when it hits the ground during a rollover. Stronger roofs crush less, reducing the risk that people will be injured by contact with the roof itself. Stronger roofs also can prevent occupants, especially those who aren't using safety belts, from being ejected through windows, windshields or doors that have broken or opened because the roof has deformed.

    In our test, the strength of the roof was determined by pushing an angled metal plate down on one side of the roof at a slow but constant speed and measuring the force required to crush the roof. The force applied relative to the vehicle's weight is known as the strength-to-weight ratio. The peak strength-to-weight ratio recorded at any time before the roof is crushed 5 inches is the key measurement of roof strength.

    A good rating required a strength-to-weight ratio of at least 4. In other words, the roof had to withstand a force of at least 4 times the vehicle's weight before the plate crushed the roof by 5 inches. For an acceptable rating, the minimum required strength-to-weight ratio was 3.25. For a marginal rating, it was 2.5. Anything lower than that was poor.

    The figure below shows sample results for two vehicles — one rated good and one rated poor. Peak force for Vehicle A is 7.26. Since that number is higher than 4, the vehicle is rated good. Peak force for Vehicle B is 2.31. Since that number is lower than 2.5, the vehicle is rated poor.

    [​IMG]



    The following video shows how the roof strength test was conducted. In this test of the 2010 Buick LaCrosse, the peak force is 19,571 pounds for a strength-to-weight ratio of 4.90 and a good rating. The playback speed of this video has been increased. The plate normally crushes at a rate of about 1/8 inch per second.

    https://youtu.be/wowEpkOMrqE?si=4VCkm9HOs5BFSg1y

    In every test, the roof was crushed 5 inches. What varied — and can't be seen in a video — is the force used by the machine to achieve that degree of crush. To demonstrate how roof strength can vary and what those differences mean for people inside a vehicle during a rollover, IIHS conducted a demonstration in which two vehicles with different roof strength ratings were subjected to identical force. This video shows what happened when the 2009 Volkswagen Tiguan, rated good for roof strength, and the 2008 Kia Sportage, rated poor, were each subjected to a crush force of 15,000 pounds.

    https://youtu.be/8o3g4wdTt44?si=u3CfhBoAp4JObkLi
     
    9pm and tyoung[OP] like this.
  2. Oct 10, 2023 at 11:53 AM
    #22
    tyoung

    tyoung [OP] Well-Known Member

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    crashnburn80 likes this.
  3. Oct 10, 2023 at 11:53 AM
    #23
    MikeyMcFly

    MikeyMcFly This is heavy, Doc.

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    Building a Broja
    Did someone say retro “roll bar”?

    Black-Horse Off-Road
    [​IMG]IMG_3200-edit by Mike M, on Flickr

    N-Fab - SE Toyota T-Force edition bar
    [​IMG]Pic-1 by Mike M, on Flickr

    Unknown, got it on CL.
    [​IMG]DSCN0305-edit by Mike M, on Flickr

    All strictly ornamental. I wouldn’t use them as a tie down, let alone a crash protection device. I like how they look, it’s my truck, the end.
     
    dneal, batacoma, ABA180 and 4 others like this.
  4. Oct 10, 2023 at 11:56 AM
    #24
    tyoung

    tyoung [OP] Well-Known Member

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    I like the way they look too, all of yours look very cool. That Black Horse one with the bracket looks perfect on the double cab!
     
  5. Oct 10, 2023 at 5:51 PM
    #25
    soundman98

    soundman98 Well-Known Member

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    i'm starting to see a lot more trucks with them again. i think the comment about taking up bed space was right on the money.


    i'm still planning on building one for my truck, i want the styling. but i demand it must fall outside the tonneau cover so i can still use the full part of the bed.

    of course, my other car has rear window louvers that took me 10 years to finish, so you could say i'm pretty firmly stuck in the 80's anyways...
     
    ABA180 likes this.
  6. Oct 10, 2023 at 6:09 PM
    #26
    TomTwo

    TomTwo I love God but I cuss a little

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    Let me push the way back button for you young guys. This was my truck when I was in the 11 grade in 1976. :D IMG_6550.jpg
     
    dneal, Squirt, soundman98 and 3 others like this.
  7. Oct 10, 2023 at 6:19 PM
    #27
    23MGM

    23MGM Well-Known Member

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    They still exist to an extent in terms of non-functional modern day fads to hang more expensive gear off of. If they did a modern day re-make of movie Back to the Future, here is your truck. Just paint it black and throw some LEDs on top and all of a sudden a new generation of kids want a Toyota truck. [​IMG]
     
    tyoung[OP] likes this.
  8. Oct 10, 2023 at 6:41 PM
    #28
    Taco Monster 20

    Taco Monster 20 Well-Known Member

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    upload_2023-10-10_21-40-25.jpg

    Don’t forget “The Fall Guy”.
     
  9. Oct 10, 2023 at 10:32 PM
    #29
    RichochetRabbit

    RichochetRabbit Bing Bing Bing

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    Expert in lights and rollbars. Does @crashnburn80 have any good quiche recipes?
     
    crashnburn80 likes this.
  10. Oct 10, 2023 at 10:36 PM
    #30
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    Helps to have a degree in vehicle design. But I do also like to cook... :spy:
     
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  11. Oct 11, 2023 at 11:14 AM
    #31
    ABA180

    ABA180 It burns when I pee....

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    Pioneer CD, Megaloud/JBL amps, Rockford/Polk speakers.
    I'd sell them if interested.

    Seen both the 2013 and 2016 in person, can confirm @MikeyMcFly has some badass rigs
     
    batacoma[QUOTED] likes this.
  12. Oct 11, 2023 at 2:15 PM
    #32
    batacoma

    batacoma Truck Wars

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  13. Oct 11, 2023 at 3:29 PM
    #33
    Shotgun Clay

    Shotgun Clay Well-Known Member

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    We’re the same age, but I had to drive a 1963 Volvo 544 with 300K miles on it. Girls wouldn’t even talk to me.
     
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  14. Oct 11, 2023 at 4:15 PM
    #34
    TomTwo

    TomTwo I love God but I cuss a little

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    That's real sad, Because that truck in my picture was a pantie dropper in it's day :D
     
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  15. Oct 11, 2023 at 4:23 PM
    #35
    batacoma

    batacoma Truck Wars

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    Probably because it had that sentimental post card painted on the door. :thumbsup:
     
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  16. Oct 11, 2023 at 4:41 PM
    #36
    3JOH22A

    3JOH22A トヨタ純正男娼

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    Yes, that's why outward visibility is so poor in newer trucks.
     
  17. Oct 16, 2023 at 3:44 PM
    #37
    Dutch216

    Dutch216 Well-Known Member

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    Im trying to figure out which light bar will fit with my OEM Toyota trifold. I 100% am putting a light bar on mine. I cannot figure out which one is going to work. Oh yeah and I am not drilling into the truck either. This is definitely the look I am going for.

    Screenshot 2023-10-16 184405.png
     
  18. Oct 16, 2023 at 5:25 PM
    #38
    soundman98

    soundman98 Well-Known Member

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    they're all about the same for mounting style.

    in the picture you posted, that unit has 2 different mounting options. 1st is shown-- where there's some 'C' shape brackets underneath the tubes. this allows the bar to sit above the cover. but it means the panel closest to the cab will be non-movable unless you can slide it backwards.

    the other mounting option is without the 'C' piece, and the tubes fall directly onto the top of the bed rail, which would prevent a cover from being installed.

    so far, i haven't found any designs that sit the tubes entirely outside the cover, and would allow my rollup cover to roll entirely up to the cab unobstructed.
     
    Dutch216[QUOTED] likes this.
  19. Oct 17, 2023 at 5:57 AM
    #39
    Dutch216

    Dutch216 Well-Known Member

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    yeah I am going to give this a go it comes saturday. The other TKMauto one looked like it was too long and you couldnt fold the panel. I really like my tri-fold so will be a good write up if it works. I think it might. (For my trifold bed cover)
     
  20. Nov 2, 2023 at 1:36 PM
    #40
    Icarus II

    Icarus II Well-Known Member

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    Love the 9 foot CB whip , too.
     
    TomTwo likes this.

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