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safety cage

Posted by puckhead 
SteveL
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Re: safety cage
August 09, 2011 03:46PM
Quote
urr
mcmaster sells that slotted channel U tubing. I've used it before for seats as well and it works great.

Andrew

Home Despot in Issaquah had it last time I was there...



SteveL
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puckhead
Ken Lewis
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Re: safety cage
August 10, 2011 12:52PM
I have most of the material to build them already I just needed something to bolt the seat brackets to I have some round stock hanging around I can just drill and tap or should I just leave them as thru bolts?
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john vanlandingham
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Re: safety cage
August 10, 2011 03:29PM
Quote
puckhead
I have most of the material to build them already I just needed something to bolt the seat brackets to I have some round stock hanging around I can just drill and tap or should I just leave them as thru bolts?


What's the wall thickness you're working with?
Thin wall means maybe a thread and a half, and thru bolt means there's a chance for crushing the tube---and crap coming loose..
That's what is also nice about the Uni-strut---flat surface, no crush tube.



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starion887
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Re: safety cage
August 10, 2011 06:42PM
Quote
john vanlandingham
Thin wall means maybe a thread and a half, and thru bolt means there's a chance for crushing the tube---and crap coming loose..

Yup, but can be solved by using a 2nd, locking nut on the bolt. Or a short thru tube tack welded into the big tube.

Mark B.
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john vanlandingham
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Re: safety cage
August 10, 2011 08:48PM
Quote
starion887
Quote
john vanlandingham
Thin wall means maybe a thread and a half, and thru bolt means there's a chance for crushing the tube---and crap coming loose..

Yup, but can be solved by using a 2nd, locking nut on the bolt. Or a short thru tube tack welded into the big tube.

Mark B.

Naturellement, mon sewer.
Mais! Doesn't a bolt thru flat surface on top with a nice locknut on the flat underside sound several multiples of easier?

Something like this?


Rather than this--which i don't understand what it is spossed to do better:




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puckhead
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Re: safety cage
August 10, 2011 11:44PM
Well it looks like the plan i had wont work so i am going to use the unistrut home depot has it should I get the thick or the thin stuff and can I weld it right to my floor pans?
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john vanlandingham
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Re: safety cage
August 10, 2011 11:47PM
Quote
puckhead
Well it looks like the plan i had wont work so i am going to use the unistrut home depot has it should I get the thick or the thin stuff and can I weld it right to my floor pans?

The weight per foot difference is about the weight of 5 frenchie fries.

I use the thicker but flatter ie not the2" tall stuff.

If you need some M10 or m12 weld thangs lemme know.



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puckhead
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Re: safety cage
August 11, 2011 07:46AM
can I weld it right to the floor pans or should I make end pieces and weld them to the pan?
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john vanlandingham
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Re: safety cage
August 11, 2011 10:24AM
Quote
puckhead
can I weld it right to the floor pans or should I make end pieces and weld them to the pan?

I ALWAYs make some simple plate to spead loads---modern floors even om my favorite Volvos and Xratties are THIN..

Oh yeah. give some care about leveling the thing.
I cannot believe how far off I managed to weld in my own seat mounts.
They were both leaned inwards by maybe min 20 degrees



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heymagic
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Re: safety cage
August 11, 2011 02:59PM
I personally would not mount a seat directly to the floor unless you absolutely had to. Floors take a heck of a beating and any serious impact with a rock or stump will head right into your spine. Some clever person can likely link to the WRC clip of the co-d getting smacked rather severely.
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DaveK
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Re: safety cage
August 11, 2011 03:54PM
Quote
john vanlandingham
I ALWAYs make some simple plate to spead loads---modern floors even om my favorite Volvos and Xratties are THIN..

^ This!

On the Custom Cages kits for the Evo at least, they supply tubes and plates that get welded between the sill and transmission tunnel.

For my BMW we welded bars from the sill bar over to the transmission tunnel where the bars terminate into nice big plates to spread the load.

In both cars, you can land on a rock and push up the floor about an inch before the lower side of these bars would contact the floor.





Dave



Edited 2 time(s). Last edit at 08/11/2011 03:59PM by DaveK.
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john vanlandingham
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Re: safety cage
August 11, 2011 05:24PM
Quote
DaveK
Quote
john vanlandingham
I ALWAYs make some simple plate to spead loads---modern floors even om my favorite Volvos and Xratties are THIN..

^ This!

On the Custom Cages kits for the Evo at least, they supply tubes and plates that get welded between the sill and transmission tunnel.

For my BMW we welded bars from the sill bar over to the transmission tunnel where the bars terminate into nice big plates to spread the load.

In both cars, you can land on a rock and push up the floor about an inch before the lower side of these bars would contact the floor.





Dave

Thank you, clever person..



PS the "stuff" arrived.

Thanks, clever person.



John Vanlandingham
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Morison
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Re: safety cage
August 11, 2011 05:29PM
Quote
heymagic
Some clever person can likely link to the WRC clip of the co-d getting smacked rather severely.
If I recall correctly, that was actually an intrusion into the car (and co-driver?) from below, not just a bump or bent floor.
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puckhead
Ken Lewis
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Re: safety cage
August 11, 2011 06:13PM
very good point I had planned on getting them as close to the floor as possible for what its worth I have floorguards too but it looks like I'll put an inch of clearance in it just to be safe thanks for the help
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alkun
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Re: safety cage
August 12, 2011 11:40AM
I went through a bunch of work to put solid mount between the sill bar and the tunnel. Its about an inch off the floor. I got a stern warning once, if the seat mounts break in a wreck; you will be in big trouble. You could hook a crane to my seat mounts and pick up the car. I also have a personal phobia about going off a drop-off, the bottom of the car pan-caking on the ground and the shock getting transfered straight to my spine...
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