WHAT EVERYONE'S GETTING WRONG ! 4WD ROOF RACK PLATFORM ON AND OFF-ROAD. Static vs Dynamic loads.
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- Опубликовано: 10 фев 2021
- WHAT EVERYONE'S GETTING WRONG ! ROOF PLATFORM LOAD LIMITS ON AND OFF-ROAD. Static vs Dynamic loads.
Loading carrying on your vehicles roof is a great way to increase your capacity however there a limits for everything.
Identifying your vehicles roof capacity is the first thing you should do, then look to the manufactured rack you wish to fit to the vehicle.
Also identify the rack manufacturers specs on both static and dynamic load.
If you plan on any off-road use the dynamic load limit or “ off road limit “ is what you need to look for and make your weight calculations from that. You might be surprised just how little you can carry with these racks while off-roading.
Hope this information has helped you.
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My back bone system is drilled, bolted with M-8 bolts and plates.
M8 is fuck all really though.
Just thought I'd add, The static load is for when the car is stationary - ie at camp and when you've got people in a roof top tent etc. However the dynamic load is for when the car is driving on any road. Not just offroad. When offroad, some manufacturers put in place a 33% offroad weight reduction to the dynamic rating of the rack aswell. So that's why this whole roof rack discussion has come up, is the actual offroad limit of these roof racks not really being warranted to hold much more than a few maxtraxs.
Good points mate 👍🏼👍🏼👍🏼
Yeh, like Ronnie said, when you're up there sleeping adds to static load too
ARB Ascent canopies, with the internal supports, are rated 100kg dynamic and 350kg static.
The platform on the canopy has a 300kg rating, so that becomes my upper limit (say, for roof top tent and people in it).
It weight 15kg, and that means I have 85kg payload dynamic and 285kg static.
ARB cab racks are limited by the manufacturers spec. In our case this is 75kg for both D and S. It weighs 30kg, so the payload is 45kg for both dynamic and static. Not much we can do there. Until car manufacturers specify their dynamic and static load limits as two separate values, we have to use the single rating they provide for all load types.
Just taking your comment at the end...."a lot of these manufacturers sell these racks on ignorance". Most likely true.
BUT. I go down the street to a retailer selling roof top tents that weight 50-100kg. They are selling on ignorance too.
It really looks like for a long time everyone has used the 'she'll be right' method. Bet thought not many retailers are going to say 'we never properly checked this out'.
Absolutely mate... anyone will sell you anything at the end of the day. Hopefully this information gets out there more people take a better look at what there putting on the roof. 👍🏼
I like your honesty and the way you look at things 👍 Too bad manufactures and people aren’t more straightforward like you. I’d love to see whistlin diesel test out some roof racks🤔🤣
I personally have only have the two bars style roof rack, not a platform like yourself and a few other creators out there. I'm glad that I'm seeing a number of creators bring light to roof rack rating. I personally only knew about the static weight limits and that was it. I wasn't aware of off-road limits. I feel like a few honest manufacturers will disclose such information for the sake of safety, thus from being transparent they will increase sales because guys like us want strong quality gear, that won't break.
Absolutely mate !!! Great comment, really appreciate you adding to the conversation 😎👍🏼
This is great. Alot of people need to know this. But some people bash on companies for their own failure.
If you ran an outside cage from the frame of your truck , following the contours of the body panels (just in front of the A-piller, and just behind the rear doors.) again keeping tight to the body up to the rack. It would have to increase your weight limit up there.
Plus I think it would look cool. Use square tube like your rack.
Yeah, I like that idea.
True, So many people don't realize the physics of things. It's good when guys like yourself help with the education side. I don't know where I would be without all the true electrical engineers out there on RUclips that helped me design my solar system.
Static and dynamic was not the problem most people know about that. Two different dynamic weights was the problem on and offroad.
Mate there's actually 2 types of dynamic load when it comes to roof racks. There's the static (which you mention) or no movement of the vehicle. Dynamic which is the load capacity of the rack when on normal driving conditions (on road) and then there's an off-road dynamic load. The off-road (off road dynamic) load rating for the Yakima is very similar to the rhino. It's around 2/3's of the racks dynamic on-road load capacity. So for example, my defender 110 has a static load roof rating of 150kg. If I use a pioneer platform, it has an 'ON ROAD' rating of 100kg (rack not included as you mentioned) which means with the weight of the rack (45kg), means 'ON ROAD' I can carry 55kg safely. Now Rhino has updated their site to include the fact that the fitting instructions dictate an 'OFF ROAD' rating of 1.5 built into the 'ON ROAD' rating which basically means 2/3rds of your ON ROAD dynamic load is your OFF ROAD dynamic load, so my 55kg 'ON ROAD' becomes 35kg 'OFF ROAD'. Now how shit is that! We went from 100kg to 35kg.
Awesome comment mate. 35kg it’s unbelievable aye !
@@TyFenwick yeah that’s with the rhino. Think front runner are slightly better rating but not much in it
That’s w their dumb mounting system all u need to do is nut and bolt to make it stronger
Thanks for this info.was knowledge I really didn't know.
Def will keep this in mind.🤔🤙
Put your load on a smart scale linked to your mobile on your roof. Drive as rough as you plan to, read how heavy your 50 lbs load weighed in at. I expect a 20% excess load for my lightweight off road driving.
My thought is that. The static load is parked it’s normally higher and comes in for people sleeping in roof tents etc. Dynamic is any movement road or off road. The dynamic load can then be different for on and off road. The issue is 2 things. 1 rack sellers just quoting a max load and then hiding things like off road reduced ratings in the small print. The other issue is vehicles having different load ratings that can change for static dynamic off road scenarios also the roofs are often rated lower than the racks and the retailers for the rack don’t make this clear enough again it’s hidden in the small print. Anyway love the big F truck and the channel 👍
Great topic ! We definitely need more info on this is the US as well. Our crew is in the process or reviewing load ratings !
Static is under its own weight (loaded and unloaded) dynamic is the weight transfer and change in centre of mass (COM) due to the forces of inertia and the vehicle traveling on inclinations
Static is when vehicle is not moving, dynamic is when vehicle is moving. There is also a separate rating for off road load which is less again than the dynamic load.
Frontrunner doesn't have a offroad rating. No reduction on load only static and dynamic
Have a look at mitsalloy, has a extended rack off a canopy single cab hilux,, off a dual cab canopy you should be able to go 2/3rds over cab roof and be stronger than a rihno rack etc direct to cab roof, then have a single clamped wisperbar/etc forward with lights fitted, worth looking at? You gotta nice set up bro
No, @1.41, weight does not change when objects move or are still. Weight remains constant.
Weight might remain the same but the pulling and pushing forces applied impact
@TyFenwick Correct, force changes as it is determined by mass x acceleration, but weight (mass), remains constant.
I was the kid remember with the dog at the back of the island on Sunday
I think people understood the difference between static and dynamic I.e stationary and driving. I think what caught people out is the 2 different dynamic load ratings (on road - off road).
👍
Be careful, a dynamic load IS NOT an off road load. That’s a different number. To get it, follow the equation below:
(Dynamic rating/1.5) - weight of rack = off road rate.
You are correct in having to calculate the roof load if it applies to your particular scenario.
My particular setup, a Jeep JLU with a backbone and 2 vortex bars comes to Static @ 800lbs, dynamic @270ish lbs, off road @150ish lbs. It’s crazy to see people carrying all that stuff on their racks not knowing that they are in danger of getting into a major accident :/
Suggest people look at the ARB Base Rack ..... probably the best platform available right now as its fully welded and pretty strong . I looked at Rhino rack and Frontrunner . Rhino is the weakest of the 3 and Frontrunner is expensive . The ARB was the same price as the Rhino and the strongest of the lot
yes year later still only one with new reduction off road rubbish.
If you have a bonk in a rooftop tent, does the load change from static to dynamic ? 😂 😮
Yes yes it does 😂
Seeing your hauling a Subie on the trailer, blown engine? hahahaha! Great video and good description of dynamic v static
Na picked her up she’s my new daily 😎🤙🏼
From what I can gather, the biggest limiting factor to how much weight you can actually carry is your roof load bearing amount. Your roof will give out long before the rack breaks.
Vehicle manufacturers would rate the roof a percentage that’s no where near what he actually roof could carry or the rack. So I’d say the rack would fail before the roof, the structural strength of a vehicles roof with all the pillars and windows would be so strong.
Good to know. This Yank from across the pond thanks you.
Can anyone tell me what the roof load limit on my 76 series land cruiser is....it is not in the manual.
up to car companies to strengthen the roofs
Im having the same issue with toyota as i have a 05 (first of the N70s) extra cab, they rate the dual cabs, but not extra cab ahaha, also what cel-fi go arial is that 🤔 looks the goods
Great info.. I watched a video the other day where the guy had a boatloader and a tinny on top of a luxie.. 350kilos all up.. The poor bugger is so illegal it isnt funny, but the boat loader company sold it to him anyway.
Yeah it gets a bit out of control aye
I’m dubious of the manufactures and insurance companies load limits on vehicle roofs. Sounds like a cop out on not covering another thing for the same price. 20 yrs ago when I first did my apprenticeship my old boss used to carry 6 1800x1200 flooring sheets and 5x 6m alloy planks on 4 old school rhino racks atop a 90’s Pajero. The only thing that blew out was the rear suspension. I’m not saying that you’d cart all that across the Simpson and back but what I am saying is there needs to be better information and accountability by all the companies involved in this situation. Alot of people have made a lot of money promoting and making things accessible for consumers to be swindled out of hard earned cash.
Hey TY, get the Frontrunner Roofrack, you won't be disappointed.
They unfortunately don’t make one for US trucks 😁
Also be aware once you modify cut weld drill in any way you void all ratings and would have to have the rack reengineered to establish new s and d ratings.
My ratings would be close to the “ I “ platform as it’s only just off by a little bit.
Reengineering a rack I think is going over board for the mods I made as it’s exactly like a standard one just in between two different size racks.
So what type of rack is this? I have 18’ f250 platinum with pano roof.
Yakima platform mate
Just out of interest mate what cel Fi go antenna is that?
Weboost mate 👍🏼
So my raptor is the same as yours, what is the "static load" rating. Am I going to break my neck through the roof one night?
I know proracks give you a onroad and Offroad limits, that was a couple years ago could of changed by now
Both S and D load should have an influence on suspension setup.
Fox DSC’s are awesome for just this. Setting a static ride height but then the dynamics while it’s in motion is different story. High and low speed compression you can adjust with DSC on fox shocks helping to control the stroke of the suspension in different terrain.
👍👍
its not rocket science, you do your homework, easy !
Yeah 100% mate. Unfortunately I feel like people just take the “ markets “ word that this works on xyz etc. people do need to check there vehicles and racks.
Homework doesn’t work, the info is not easy to find or non existent
only a shit rack has a reduction.
arb base rack = no reduction.
Frontrunner no reduction aswell
@@tobiasfoppen2658 bloody ugly and heigh of the roof though...
o need to keep repeating yourself to pad out the length of video
We get it
Calm down Wayne, no one forced you to watch it 😂