How to secure force measurement frame to vehicle?

I have a frame that needs to be secured to typical Ford vehicle with Third Row seats.  Attached picture shows one of the fixed points on the frame.  There are total eight fixed points on the frame, Four in front leg of the frame which will be located in front of third row seats.  And Four in rear leg of the frame which will be located behind Third row seats.

The location of frame with respect to seat is shown in the picture.   One of attached picture also shows a black suction thing that seat will exert force on.  The frame needs to be secured to the vehicle so it doesn't move.

What might be some fixed points on the vehicle?  When the seat hits the suction thing, there must not be any damage to the vehicle and frame shouldn't move.

What might be some fixed points on the vehicle that this frame can be connected to?  Tailgate, doors, or what ?

What should be used to connect frame fixed points to vehicle fixed points?  some kind of straps ?
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naseeamAsked:
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Tiras25Commented:
No picture attached.
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naseeamAuthor Commented:
Sorry I forgot to attach the pictures.
Frame-Fixed-Point.jpg
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naseeamAuthor Commented:
Another picture.
Frame-3.JPG
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nickg5Commented:
In your first photo is that the position where the blue seats (seen in that photo) are going to be situated in relation to the frame once installed?
And you only have one fixed point on the frame indicated in the same photo?
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naseeamAuthor Commented:
Yes, that is the position where the blue seat is going to be situated in relation to the frame.

In the photo, I only indicate One fixed point but there are eight fixed points on the frame.  You can see second fixed point is adjacent to the first fixed point.  Then, there are Two fixed points towards the bottom of front leg.  Also, there are Four fixed points on rear frame leg.
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nickg5Commented:
I can not quite see where the suction will touch the raised seat. It looks like the front of the seat is to the left in the photo below.

Can you fabricate your own steel braces and have them welded if needed?

front ?
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Michael-BestCommented:
Photos are not going to help here unless you can give exact details of what they show.
What is the the frame used for?
Please explain you question in more detail for better expert advice.
You need hands on help by a specialized person that can address your needs.
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nickg5Commented:
I worked for a couple years mounting law enforcement equipment to floorboards of emergency vehicles. All finished installations were inspected by independent quality control persons. So such projects are feasible.

The two upper fixed points do not appear to be adequate for support since mounting to a ceiling brace or bracket that you might install would be difficult.

However the 4 lower fixed points may very well be able to be secured to the floorboard and withstand the force you require.

Even a cross brace running laterally across the ceiling and mounted in some way seems sketchy.

What do the 4 lower fixed points look like as far as being flat plates, their thickness, etc. ?
I saw some photos whereby someone adapted the existing surfaces to allow them to weld thick steel braces in order to mount what they wanted.

I can post those photos which can give you an idea how they went about it though their project and yours are different but the way they mounted theirs on the lower ends could be of value to you.
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naseeamAuthor Commented:
In the photo, seat is in folded position.  The suction and frame will be adjusted so seat exerts force on suction at Ninety Degree Angle.  

Correct!  Front of seat is to the left on the photo above.

No, there is no plan to fabricate my own steel braces and have them welded if needed.  There is no plan to alter the frame and vehicle that the frame will be secured to.

This is power folding seat.  Upon momentary press of a button, seat will lift up and hit the suction at ninety degree angle.  There is a sensor mounted on suction.  This sensor is connected to force meter.  Force exerted on suction will be measured and displayed.  The frame needs to be stationary while seat exerts force on suction.  This way accurate forces will be measured.  If frame moves then it cannot exert equal and opposite force on seat and force reading will be inaccurate.

You are correct I need hands on help from a specialized person, but that won't be available.

Do Two upper fixed points have to be mounted to ceiling?  What if they are mounted to floorboard instead?  What physics principle(s) are used to determine where Two upper fixed points should be mounted?

4 lower fixed points will be secured to what on the floorboard? Are there hooks on the floorboard in a typical Ford vehicle with Third row seats.

Attached is a photo of a lower fixed point.  The diameter of the hole is about 0.56 inches.  

I will not be doing any welding.  I'm planning to use Ratchet Tie-Downs and cam Buckles to ensure equipment is held firmly on the third row of a typical Ford vehicle.
Frame-Fixed-Point-zoom.jpg
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nickg5Commented:
Some Explorer's for example don't have three rows of seats but may have the holes for third row seats to be added.

Your lower 4 fixed points can handle 1/2 bolts. You can examine the holes that are there now for the existing seats and drill new holes for your 4 lower braces in the same manner and nearby location so as to avoid what is underneath such as the drive shaft, muffler, etc.

As far as a specialist, some persons always contact a car dealer or a licensed plumber, etc. on every repair job or project.
Then others can handle their own simple oil changes, brake pads, and installations without going that route.
Care and preparation can help avoid specialist in alot of cases. My Mother can change her own oil as one small example.
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Michael-BestCommented:
"What might be some fixed points on the vehicle?  When the seat hits the suction thing, there must not be any damage to the vehicle and frame shouldn't move."

Is this another possible exam related question, similar to the ones I had helped you with before?
One I recall was about a paving machine.


Suggest you use the fixed points on the vehicles frame with padded pressure pads, so as to not to cause any damage.
Only reinforced steel frame such as seat / safety belt / other accessories mounting points in the vehicle should be used,
The location of the fixed points must be calculated to distribute the directional force as to counter the force that will thrust on the force measuring device ( force measurement frame ).
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Michael-BestCommented:
"Do Two upper fixed points have to be mounted to ceiling?  What if they are mounted to floorboard instead?  What physics principle(s) are used to determine where Two upper fixed points should be mounted?"

The upper and lower mounts can be the safety belt mounts once you have removed the safety belt bolts.
You can also use the other seat mounts as the lower mounts once you have removed the seats.

You state that "there must not be any damage to the vehicle and frame shouldn't move"
This rules out drilling holes for mounts as suggested byvnickg5
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nickg5Commented:
It's hard to visualize straps (with no floorboard drilling) to properly and safely secure the 4 lower fixed points which may be critical if safety is a concern.

When we installed heavy emergency vehicle equipment under seats and on the hump in the front between the driver and passenger side, we drilled holes through carpet and floorboard for professional installations that were approved by quality control experts for quality and safety. No one wanted an emergency employee to be hit in the head by a flying piece of radio equipment. The bolts and large lag screws did the job and in no way impaired the cosmetics of the new vehicles.

If your device does not require a safety factor then maybe tie down straps can work for you.
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"You can also use the other seat mounts as the lower mounts once you have removed the seats."
I did not think you planned to remove the seats.................
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naseeamAuthor Commented:
>> "Your lower 4 fixed points can handle 1/2 bolts."
Are you saying to drill hole in floorboard.  Then, screw a bolt and nut into the hole.  Then, how would I attach my ratchet tie down to this bolt.

This isn't an exam question.  I'll actually attempt to tie down this frame to 3rd row seat of a vehicle.

What is reinforced steel frame?  Is the suggestion to mount the frame in place of the seat belt?
3.  >> "The location of the fixed points must be calculated to distribute the directional force as to counter the force that will thrust on the force measuring device ( force measurement frame ).
Please provide examples of this calculation.  Does this involve Engineering Statics?

How to use safety belt and seat mounts?  After removing safety belt and seat bolts, will I be left with holes?  Exactly how will I attach ratchet tie down to safety belt and seat mounts.

How to sink bolt and large lag screw in hole?  Will ratchet tie down connect to what part of lag screw?
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Michael-BestCommented:
Busy just now, but I shall get back to your questions in the next few days.

Regards,
Michael
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naseeamAuthor Commented:
Great support!
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