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  1. #1
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    Default Interesting video about roof racks - Ronny Dahl

    https://www.youtube.com/watch?v=r32xd9z4SZ4

    https://www.youtube.com/watch?v=eMx232haRyo


    Interesting about roof racks - I am only starting my overlanding journey now so I found this rather interesting so thought I would share, probably common knowledge to most but hey, you never know...I kinda just find it weird that a Hilux can legally only carry 75kg on its roof (purely going by this vid, I did not look it up myself) ... this includes the weight of the rack ... seems a bit low but hey-ho ...I learnt something new today ...
    Last edited by flyfisherman; 2021/02/10 at 11:20 AM.

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Very important factor in any vehicle build and setup choices, but guess most ignore this, or are oblivious to the actual weight on their roof. I for one has never weighed all the stuff on the RR to compare to vehicle specific roof load rating. I did two trips, Bots and Moz with possibly exceeding the LC 80's roof load rating?

    You see some seriously overloaded RR's, 80L of fuel, 40L water, RTT, HLJ, big axe, lights, solar panel(s), etc etc. This may be +250Kg.

    So it opens the argument of towing an offroad trailer, even a small Genie or whatever purely to share the load and bring you back into the vehicle safety ratings.
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    Default Re: Interesting video about roof racks - Ronny Dahl

    .
    Last edited by EttiennedK; 2021/02/10 at 01:31 PM. Reason: Fascetious comment
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    Default Re: Interesting video about roof racks - Ronny Dahl

    I only watched one of the two.

    However, 75kg is not far below average, and very few vehicles have a roof load limit over 100kg. I have certainly significantly overloaded my roof many times (and gone off-road like that), and I suspect most people with roof racks are in the same boat.

    Frankly, it's almost impossible to put anything worth while on a car's roof without exceeding the load limit. Even the on-road load limit.

    But take it one step further: do you know what your vehicle ways? By the time I have filled my fuel tanks and loaded (empty) fridge and my family aboard, my car is at it's GVM. That's no food, no camping equipment. And despite my signature, there really isn't all that much on my car. Just some bash plates, rock sliders, larger fuel tanks, a very light bull bar, a light drawer system and a roof rack with awning and jack.

    I am not condoning it, just stating a fact. It is impossible to overland with a typical SUV and a family of 4 without overloading it, unless you have everything in a trailer. And I think most overlanding-prepped bakkies are probably overloaded too.
    Last edited by Peter Connan; 2021/02/10 at 12:19 PM.
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    Default Re: Interesting video about roof racks - Ronny Dahl

    Interesting thing, at Land Rover Experience they tell you that for example, an old Defender's roll-over angle is 35°, and with a roofrack alone it comes down to 18°. This was tested on the tilting table at Girotech. One cannot underestimate the effect it has on handling, safety and offroad ability.

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by Peter Connan View Post
    I only watched one of the two.

    However, 75kg is not far below average, and very few vehicles have a roof load limit over 100kg. I have certainly significantly overloaded my roof many times (and gone off-road like that), and I suspect most people with roof racks are in the same boat.

    Frankly, it's almost impossible to put anything worth while on a car's roof without exceeding the load limit. Even the on-road load limit.

    But take it one step further: do you know what your vehicle ways? By the time I have filled my fuel tanks and loaded (empty) fridge and my family aboard, my car is at it's GVM. That's no food, no camping equipment. And despite my signature, there really isn't all that much on my car. Just some bash plates, rock sliders, larger fuel tanks, a very light bull bar, a light drawer system and a roof rack with awning and jack.

    I am not condoning it, just stating a fact. It is impossible to overland with a typical SUV and a family of 4 without overloading it, unless you have everything in a trailer. And I think most overlanding-prepped bakkies are probably overloaded too.
    Looking at some of them on the road I can completely agree that some of them must be overloaded - curious I wonder what would happen if an overloaded vehicle is in an accident and, worst case scenario there are fatalities etc etc - could an overloaded vehicle affect being help responsible or affect an insurance payout if for example you are cruising along on a road and you somehow crash or your vehicle is written off?
    Last edited by flyfisherman; 2021/02/10 at 12:59 PM.

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by flyfisherman View Post
    Looking at some of them on the road I can completely agree that some of them must be overloaded - curious I wonder what would happen if an overloaded vehicle is in an accident and, worst case scenario there are fatalities etc etc - could an overloaded vehicle affect being help responsible or affect an insurance payout if for example you are cruising along on a road and you somehow crash or your vehicle is written off?
    Short answer - yes. I've been there.

    EDIT: Not the fatalities bit. Just the bit where Insurance Company gave me the finger.
    Last edited by EttiennedK; 2021/02/10 at 06:18 PM.
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    Default Re: Interesting video about roof racks - Ronny Dahl

    I have a LC 100 series and the max roof rack carrying capacity is 200 kg. (Including the weight of the roof rack itself.
    With RTT, extra spare tyre, gas bottle, Jerry can, Hi-Lift Jack, awning, etc. I am at about full capacity.

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Ronnie only made this video due to comment about fellow Aussie tuber Tyler Thompson. He actually had first hand experience. Traveling off road his dislodged from his Navara. Ripped out of the roof with rooftop tent and all. Minor damage other than holes in roof. Did investigation and found about off road. Credit to Ronnie for crediting Tyler who is newish to yet and fellow aussie

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    Default Re: Interesting video about roof racks - Ronny Dahl

    I'll be seriously ticked off if I only find out afterwards that the weight rating drops even more if going off road, I never even thought of something like this.

    A thought though do the vehicle manufacturers give both a static and dynamic load rating? Say for argument sake you get a rack and RTT which fits in the 75 kg limit of the Hilux so all legal, but now you add a static load, 2 adult bodies say 160 kg to that. Now something happens to your roof a side pillar cracks or whatever, will the manufacturer honor the warranty?
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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by bigboy529 View Post
    I'll be seriously ticked off if I only find out afterwards that the weight rating drops even more if going off road, I never even thought of something like this.

    A thought though do the vehicle manufacturers give both a static and dynamic load rating? Say for argument sake you get a rack and RTT which fits in the 75 kg limit of the Hilux so all legal, but now you add a static load, 2 adult bodies say 160 kg to that. Now something happens to your roof a side pillar cracks or whatever, will the manufacturer honor the warranty?
    I don't think many vehicle manufacturers do, but on the other hand I don't think it is a valid concern as I don't think the roof load limit has much if anything to do with the structural rigidity of the vehicle. If a car's roof pillars cannot carry well in excess of the weight of the vehicle, that roof gives no rollover protection.

    Even a Defender's roof should easily carry several hundred kg statically, assuming the roof rack's feet are placed directly over the pillars.

    I am pretty sure the roof load limit is now mostly determined by vehicle dynamics in a "moose test" type accident avoidance scenario.
    Last edited by Peter Connan; 2021/02/11 at 08:35 AM.
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    Default Re: Interesting video about roof racks - Ronny Dahl

    What is more scary it that people put roof racks on vehicles with modified suspensions to aid flex. Loosening coil clams and deleted sway bars.

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Very interesting topic. I watched the videos looked at the carry capacity ratings and the calculations, but I am afraid the calculations goes deeper than what is on the white board in the one video. Let's look at a fundamental question that should be addresses in the calculations.

    What happens to Mass in Motion?

    Mmmmmm....
    Regards

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by HeinrichC View Post
    Very interesting topic. I watched the videos looked at the carry capacity ratings and the calculations, but I am afraid the calculations goes deeper than what is on the white board in the one video. Let's look at a fundamental question that should be addresses in the calculations.

    What happens to Mass in Motion?

    Mmmmmm....
    Therein lies a massive risk, they guys screaming along at 120k's/h in the dunes with RTT etc on the RR to concur that huge climb. Imagine the forces applied to the mounting points then. Or an emergency brake scenario.
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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by bigboy529 View Post
    A thought though do the vehicle manufacturers give both a static and dynamic load rating? Say for argument sake you get a rack and RTT which fits in the 75 kg limit of the Hilux so all legal, but now you add a static load, 2 adult bodies say 160 kg to that. Now something happens to your roof a side pillar cracks or whatever, will the manufacturer honor the warranty?
    And if the 2 adult bodies perform coitus is that then dynamic load or static load? Or does it depend on the age of the bodies
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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by Dwayne P View Post
    Ronnie only made this video due to comment about fellow Aussie tuber Tyler Thompson. He actually had first hand experience. Traveling off road his dislodged from his Navara. Ripped out of the roof with rooftop tent and all. Minor damage other than holes in roof. Did investigation and found about off road. Credit to Ronnie for crediting Tyler who is newish to yet and fellow aussie
    here are the relevant videos showing Tyler Thompson’s Rhino Rack that tore off his bakkie roof:

    everything tore off my roof...
    https://youtu.be/0np7vkn87J8

    is it worth getting a tray and canopy?
    https://youtu.be/IfwgtQYtBnE

    is your roof rack a Disaster waiting to happen ?
    https://youtu.be/eMx232haRyo
    Last edited by ceres01; 2021/02/14 at 07:46 PM. Reason: the spelling gremlin emerged

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by Dwayne P View Post
    Ronnie only made this video due to comment about fellow Aussie tuber Tyler Thompson. He actually had first hand experience. Traveling off road his dislodged from his Navara. Ripped out of the roof with rooftop tent and all. Minor damage other than holes in roof. Did investigation and found about off road. Credit to Ronnie for crediting Tyler who is newish to yet and fellow aussie
    Hindsight is always 20/20 and listening to what ASPW says in his 2019 video “ROOF RACKS - the GREAT, the ORDINARY and the AWFUL. How to select the right one”, he refers several times to the load-carrying capacity of roof racks, of the vehicle’s roof, the lateral movements during offroading that cause the most damage, and importantly the feet / fitment system to the roof that is the point of failure in 90% of cases:

    https://youtu.be/-JmNPBKIyVE

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    Default Re: Interesting video about roof racks - Ronny Dahl

    Ronny Dahl - I STUFFED UP!! Overloaded my Roof
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    Default Re: Interesting video about roof racks - Ronny Dahl

    Read the handbook, it is for your own safety, ....... and other road users.
    Not too long ago a dealer had a long "discussion" with a client that blamed Suzuki for making crap Jimny's, and then proceeded to post a video of said, heavily overloaded roof rack, coming down Van Zyl's or Bobbejaans, cannot remember.
    The vehicle limits are there, for your safety.......
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    Default Re: Interesting video about roof racks - Ronny Dahl

    Quote Originally Posted by Gustav Jimny View Post
    Read the handbook, it is for your own safety, ....... and other road users.
    Not too long ago a dealer had a long "discussion" with a client that blamed Suzuki for making crap Jimny's, and then proceeded to post a video of said, heavily overloaded roof rack, coming down Van Zyl's or Bobbejaans, cannot remember.
    The vehicle limits are there, for your safety.......
    100%!!!



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