Gutters surviving 420kg?

das mo · Jun 14, 2023

Just talked to BSI again. They created a high lift version of their feet that might fit my setup as additional support and take it to 5 feet each side. A, B and C being the gutter mounted DOT200 and the red marks being the spot for the BSI high lift mounts connecting to the bars.

Tom109 · Jun 14, 2023

Loc Nar said:
DaveB, so the three SUP boards basically created a sail that the gutters could not hold against the bow wave from the truck? Scary stuff! I've also not been impressed by the flex we've seen in the gutters.

As I mentioned before, I've used roof racks on a Range Rover Classic (aluminum gutter), Discovery 1 (Steel gutter) and Series (alu/steel gutter) - all of which could be considered flimsy - with no gutter failures. I expect the Grenadier to be more substantial or at least equivalent. I have had rack feet fail, most notably from carrying a 17-foot canoe where lateral loading and wind resistance can be very large.

Tazzieman · Jun 14, 2023

Tom109 said:
As I mentioned before, I've used roof racks on a Range Rover Classic (aluminum gutter), Discovery 1 (Steel gutter) and Series (alu/steel gutter) - all of which could be considered flimsy - with no gutter failures. I expect the Grenadier to be more substantial or at least equivalent. I have had rack feet fail, most notably from carrying a 17-foot canoe where lateral loading and wind resistance can be very large.

I've had illegal loads on roof bars of my Disco 1 with not a hint of flex.
Almost 30 years of use , not damage at all.

DaveB · Jun 14, 2023

MrMike said:
I must say that is a nice rack, much better IMO, good that they are utilising the roof bars also (?)

I said that to a woman in a bar once.
It didn't end well.

Tom109 · Jun 14, 2023

Tazzieman said:
I've had illegal loads on roof bars of my Disco 1 with not a hint of flex.
Almost 30 years of use , not damage at all.

When my boys were young and we'd go to a LR Rally the Disco seriously looked loaded like the Camel Trophy!

Loc Nar · Jun 14, 2023

Tom109 said:
As I mentioned before, I've used roof racks on a Range Rover Classic (aluminum gutter), Discovery 1 (Steel gutter) and Series (alu/steel gutter) - all of which could be considered flimsy - with no gutter failures. I expect the Grenadier to be more substantial or at least equivalent. I have had rack feet fail, most notably from carrying a 17-foot canoe where lateral loading and wind resistance can be very large.

Are the Grenadier gutters aluminum, steel, or a combo?

Tom D · Jun 14, 2023

I think the issue is that the Grenadier gutters are really wide. any system that mounts right out on the edge of the gutter is going to stress it, like Thule. Something mounted closer in should be fine.

Pat-Ard · Jun 14, 2023

das mo said:
Just talked to BSI again. They created a high lift version of their feet that might fit my setup as additional support and take it to 5 feet each side. A, B and C being the gutter mounted DOT200 and the red marks being the spot for the BSI high lift mounts connecting to the bars.

View attachment 7816490

Hi, @das mo ,

will those feet be sold seperatly and be compatibla to the aluminium profiles?

Ovrland Bill · Jun 14, 2023

DaveB said:
I said that to a woman in a bar once.
It didn't end well.

But, was that said in rooftop bar?

Tazzieman · Jun 14, 2023

Ovrland Bill said:
But, was that said in rooftop bar?

No, in the gutter

Loc Nar · Jun 14, 2023

Tazzieman said:
No, in the gutter

So many Dads up in here and so many Dad jokes. I've found my people.

ADVAW8S · Jun 14, 2023

On le tech set up, it looks like you can get you hand onto the lashing bars. I wonder if you put let's say you put Black Sheep molle panels first and then rack, it would work.

ADVAW8S · Jun 14, 2023

Also, here is idea if you like Letech or Black Sheep, you attach a bar with some space on to the L track. Just spit balling hear.

bigleonski · Jun 14, 2023

I wonder if you had any grab rail damage issues using the BSI rack as it is anchored whether IA would cover under warranty- not likely. Can anyone remember the load allowance on those rails? Was it 150kg?

DaveB · Jun 15, 2023

bigleonski said:
I wonder if you had any grab rail damage issues using the BSI rack as it is anchored whether IA would cover under warranty- not likely. Can anyone remember the load allowance on those rails? Was it 150kg?

I was trying to find it but no luck
From memory DCPU posted the drawings and submission to the patents office about a year ago.
I recall they can be used to tie down the full roof load of 150kg dynamic and 420kg static but can't find it written anywhere.

DenisM · Jun 15, 2023

bigleonski said:
I wonder if you had any grab rail damage issues using the BSI rack as it is anchored whether IA would cover under warranty- not likely. Can anyone remember the load allowance on those rails? Was it 150kg?

I'm sceptical that the grab rail solution by BSI is within the design intent of the IG...
IIRC the grab rail was designed for a tie down, not as a weight bearing entity.
From the IA brochure descriptions, the roof load of 450kg static and 150kg dynamic was implied to be shared between the roof itself (on the roof strips) and the specialised gutter mount design where the weight is distributed .

Loc Nar · Jun 15, 2023

DenisM said:
From the IA brochure descriptions, the roof load of 450kg static and 150kg dynamic was implied to be shared between the roof itself (on the roof strips) and the specialised gutter mount design where the weight is distributed .

Does the full length roof rack rest on the roof strips? The brochure says the max static/dynamic ratings stated are achievable with it on (minus the weight of the roof rack of course).

Tom109 · Jun 15, 2023

Loc Nar said:
Does the full length roof rack rest on the roof strips? The brochure says the max static/dynamic ratings stated are achievable with it on.

No.

grenadierboy · Jun 15, 2023

DenisM said:
I'm sceptical that the grab rail solution by BSI is within the design intent of the IG...
IIRC the grab rail was designed for a tie down, not as a weight bearing entity.
From the IA brochure descriptions, the roof load of 450kg static and 150kg dynamic was implied to be shared between the roof itself (on the roof strips) and the specialised gutter mount design where the weight is distributed .

Denis - that can't be right otherwise the load would have to be spread across/held by BOTH rubber strips and gutters to achieve static & dynamic weight limits if not then you would need to deduct the weight limit for either one each was NOT carrying any weight?

My old G wagen gutters had no flex at all and carried plenty of weight - they must be steel

Loc Nar · Jun 15, 2023

grenadierboy said:
My old G wagen gutters had no flex at all and carried plenty of weight - they must be steel

Someone needs to hold a magnet to the Grenadier gutters.

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Gutters surviving 420kg?

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