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"What do I need for.." Safety Requirements for NHRA (Rollbar, Rollcage, harness, etc)

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Old 05-13-2016, 04:04 PM
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"What do I need for.." Safety Requirements for NHRA (Rollbar, Rollcage, harness, etc)

 
Old 07-08-2016, 03:44 PM
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What do you want to know?
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Old 07-08-2016, 03:58 PM
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Just go to the NHRA website and view it for free and whenever you want. Even though that question was asked 1.5 years ago.
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Old 09-18-2016, 10:30 AM
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I am in the process of planning a 5 point for my turbo truck that will be 10.00 capable.

I'd like to do a bar style with the main hoop behind the seat. A cross brace just above the stock bench for a harness attachment. Then A-pillar bars that come up and back and tie into the top of the main hoop. A windshield bar from a-pillar to a-pillar.

The 5th point, diagonally from the main hoop on down I have a question about. Can I s-bend it to make getting in and out easier? Or make it a swing out?

How do I tie into the frame from next to the A and B pillars?

I see that mild steel 1-3/4x.188" wall is the spec, but I only have bending dies for 1-5/8" can I do that in .188" wall?

This is a street truck that I use to haul parts and stuff, so back bars would be a major hassle.

Thanks,

Doug
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Old 09-18-2016, 10:47 AM
  #104  
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Originally Posted by truckdoug View Post
I am in the process of planning a 5 point for my turbo truck that will be 10.00 capable.

I'd like to do a bar style with the main hoop behind the seat. A cross brace just above the stock bench for a harness attachment. Then A-pillar bars that come up and back and tie into the top of the main hoop. A windshield bar from a-pillar to a-pillar.

The 5th point, diagonally from the main hoop on down I have a question about. Can I s-bend it to make getting in and out easier? Or make it a swing out?

How do I tie into the frame from next to the A and B pillars?

I see that mild steel 1-3/4x.188" wall is the spec, but I only have bending dies for 1-5/8" can I do that in .188" wall?

This is a street truck that I use to haul parts and stuff, so back bars would be a major hassle.

Thanks,

Doug
Kind of confused on if you are installing a roll bar or a roll cage Doug. For a bar you must use 1-3/4"...a cage is allowed 1-5/8". I would recommend the cross bar be just below the seat back for support. Yes you can bend door bars as well as use swing-out's. I just had a 6-point bar installed in my El Camino without the rear bars going thru the back glass or into the bed...it can be done.

Rich
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Old 09-18-2016, 02:20 PM
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sorry Rich, i'm new to the nomenclature. I see car-style 5 points referred to as "bars" and sometimes as "cages". I suppose mine would be callled a cage since it has the windshield bar?

do you have any pics of yours you would care to share?

this is my first from scratch cage. i have installed kits and modified existing cages before.

I am still concerned with how I tie the A and B pillar bars to the frame. Should I just come through the floor and into some rectangle tube (.188 ok?) over to the frame?

Thanks for answering my cage-n00b questions.

Doug
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Old 09-18-2016, 04:12 PM
  #106  
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Doug - By roll bar I consider this to be one example...

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This one representing a cage...

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If you are trying to get a cage NHRA certified it will be near impossible without the rear down bars. There is one exception for trucks, but you would not enjoy what is involved. It's called a funny car cage and it involves a ton of tubing...not something you would want to endure for a driver.

A roll bar would be more forgiving by design and most never get eyeballed at the track as long as they appear correct. The problem is the rear down bars are still required in order to be effective.

Unless you are running a sanctioned race class and are required to go thru tech inspection the problems are probably moot as most tracks do not employ any tech requirements other than the basics. It becomes the driver's comfort level with the safety of their life and limbs.

I wish I had pictures of the El Camino bars, but it is being finish welded atm...I expect it back any day now. You could not accomplish what I have given the even tighter confines of your C10 tho. A skilled fabricator can however get some down bars into the bed floor without going thru the rear window. I would highly recommend using CM tubing to reduce weight.

Whatever you decide, if you intend to drive this often on the street pad the hell out of those bars, especially around your head. I'll post some pic's here for you when the El Camino is back home.

Rich
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Old 09-18-2016, 05:34 PM
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Rich, thanks for the input. The learning curve is pretty steep on this. I hadn't even considered the ramifications of having a bar right next to my head while driving on the street.
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Old 09-18-2016, 05:51 PM
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Yes it's problematic...I'll have to deal with the same issue at some point when the El Camino returns to street duties.
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Old 09-24-2016, 06:13 PM
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Here it is, finally back home.

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