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Safety tips for our old rigs

Veg_Out

Walking J Designs
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Location
Boise, Idaho
Friends,

Perhaps you folks can add more ideas. I think a 4" exhaust is a good safety upgrade too! If we can get some good thoughts in here, perhaps all our families, and the familes of other folks who aren't buying brand new rigs can be enhanced. I love the collaborative nature of this site.

I love my Suburban. It is gigantic. It has good power. It drives wonderfully on the open road. However, it is lacking in one thing I find critically important.

As a father, I haul small children all the time. My Burb was built before "LATCH" technology. While I can get my car seats in using the seatbelts pretty well, I can always get them in more solidly in a newer car that has "LATCH" connectors. (FYI, I am a carseat Nazi, as a result of the loss of a child that one of my friends suffered. Their loss was carseat related.)

My little simple upgrade costs about $3. This only works for Suburban owners who don't use the 3rd row seat, since I used the anchor for the third row. I used a cable anchor, rated to 1,320 pounds, placed into the 3rd row seat anchor slot, tighted it up, and voila, attached the top "LATCH" strap to the anchor. It really tightened up the top of the seat and everything feels more secure. Sorry for the quality on the last shot, but you can see how it works.
 

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It looks nice, but are you sure its strong enough? A head to head impact with a 30lbs child in the seat may exceed 1,300 lbs.

Seat belts are straps rated for over 10,000. Did you know you can lift a vehicle off the ground by its seat belt? (I use to tow/recover cars).

Please verify that that latch is strong enough for the cutie in the swing.
 
Any idea how to do that math problem? I will gladly upgrade to a larger hook. I do know that it is stronger than it was.

Crazy seatbelt strength. Good to know.
 
It looks nice, but are you sure its strong enough? A head to head impact with a 30lbs child in the seat may exceed 1,300 lbs.

Seat belts are straps rated for over 10,000. Did you know you can lift a vehicle off the ground by its seat belt? (I use to tow/recover cars).

Please verify that that latch is strong enough for the cutie in the swing.

I agree! You need more strength!

I wish I was better at math.
 
It's been 30 yrs since high school but as best as I can remember it would be 2640 ft/lbs/sec at 60 mph.

Leo
 
That's a very happy looking little girl! Great idea!

I can't tell what size you have there, but a galvanized 5/16" shackle will have a working load of about 1,500lbs. A 3/8" would be about 2,000lbs. I *think* SS is slightly less. There are other types of hardware that have higher ratings. But, I'd venture a guess that the shackle is stronger than the child seat's hook.
 
What do you do when you need your 3rd row seat? Luckily I only have one of my 5 left who uses a booster seat. No need for the strap. I actually used the cargo net hook on the 3rd row for the strap when they were using car seats. When I had 3 in car seats I hooked the strap behind and under the seat on my Excursion.
 
Matt mentioned 30 lbs, I never took the seat into account
I can't do the equation with this key board but I just converted 60mph to feet/sec x 30 lbs

Leo
 
force = mass x acceleration

acceleration = velocity change / time

But then the higher math of conversions and units gets me everytime.

Here is one attempt feel free to point out any errors.

60 mph = 26.8 m/s
40lbs =18.1 kg But slugs vs lbm vs lbf always kills me.

estimated 1.5 second to stop in head on impact???

F= 18.1 x 26.8/1.5 = 478.8 newtons = 72 lbs force

BUT!

the velocity vectors are not aligned with the strap directions so angles are needed to calculate tension strength of belts verses the cosine or sine components

guesstimate-
72 lbs / cos80 deg = 414 lbs tension strenght ????.


That numbers still seems low Again someone feel free to correct units or conversions. My memory stinks.


I think the shackle looks as strong as the clasp on the car seat.

In the end its better than before. Good tip.

recalculate at .5 seconds to stop = 1255 lbs tension minimum???

x 2 times safety factor = 2510 lbs tension
 
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