25 replies to this topic

[danllew]

I'm going to start the process of fitting a Safety Devices Bolt-In Cage this weekend.

 

I've got the fitting kit which contains the weld in plates for the inside of the car.

 

What have other people done when it comes to the outside of the car?

 

Also is there a modification that needs doing to stop the inner and outer sill pulling together when the bolts are tightened?

 

Any advice/help would be appreciated.

Edited by danllew, 14 February 2017 - 03:24 PM.

[ozz1]

pretty sure the 'weld in plates' you have been supplied are the spreader plates - these go on the outside of the car to spread the load in an impact and stop the inner and outer sill pulling together (as much) when tightend.

 

people do reinforce mounting points by simply plating over or making a box profile to bring the cage closer to the roof  and create wider load path but whether this is necessary is dependant on use - i.e motorsport where regulation states so.

Edited by ozz1, 14 February 2017 - 03:56 PM.

[rally1380]

pretty sure the 'weld in plates' you have been supplied are the spreader plates - these go on the outside of the car to spread the load in an impact and stop the inner and outer sill pulling together (as much) when tightend.

 

 

WRONG.

 

The plates weld inside.  Think when a car rolls over, the cage will be pushed into the floor, these plates spread that force.   I know some people on here would argue that, but i'm right....end of

 

You will find where the bolts pass through the inner and outer sills are very close together anyway....don't worry about it.

 

Big washers on the outside under the bolt heads and away you go.  Remember to put the bolt on the outside and not the nut with the thread showing through.....bugger to remove with a knackered thread.

[rally1380]

people do reinforce mounting points by simply plating over or making a box profile to bring the cage closer to the roof  and create wider load path but whether this is necessary is dependant on use - i.e motorsport where regulation states so.

 

'Box profile' - usually indicative of weld in cages.

 

A SD bolt in cage will be very close to the roof skin anyway.....good luck lifting it any more.

[ozz1]

 

pretty sure the 'weld in plates' you have been supplied are the spreader plates - these go on the outside of the car to spread the load in an impact and stop the inner and outer sill pulling together (as much) when tightend.

 

 

WRONG.

 

The plates weld inside.  Think when a car rolls over, the cage will be pushed into the floor, these plates spread that force.   I know some people on here would argue that, but i'm right....end of

 

You will find where the bolts pass through the inner and outer sills are very close together anyway....don't worry about it.

 

Big washers on the outside under the bolt heads and away you go.  Remember to put the bolt on the outside and not the nut with the thread showing through.....bugger to remove with a knackered thread.

 

fair enough - i've done it wrong in that case...

Edited by ozz1, 14 February 2017 - 04:22 PM.

[rally1380]

 

 

pretty sure the 'weld in plates' you have been supplied are the spreader plates - these go on the outside of the car to spread the load in an impact and stop the inner and outer sill pulling together (as much) when tightend.

 

 

WRONG.

 

The plates weld inside.  Think when a car rolls over, the cage will be pushed into the floor, these plates spread that force.   I know some people on here would argue that, but i'm right....end of

fair enough - i've done it wrong in that case...

 

I must admit I know of others who have done it that way, and I was tempted myself as it's much easier, but easy doesn't always mean right.

[danllew]

Cheers for the replies. Do you guys have any opinions on keeping the rear bins? 

 

Some people say they're structural others say they aren't. 

[mini-geek]

In my opinion any strength you might loose will be replaced by the cage..

And yes plates on the inside it's very common to see them on the outside but that is wrong..

[nicklouse]

 

pretty sure the 'weld in plates' you have been supplied are the spreader plates - these go on the outside of the car to spread the load in an impact and stop the inner and outer sill pulling together (as much) when tightend.

 

 

WRONG.

 

The plates weld inside.  Think when a car rolls over, the cage will be pushed into the floor, these plates spread that force.   I know some people on here would argue that, but i'm right....end of

 

You will find where the bolts pass through the inner and outer sills are very close together anyway....don't worry about it.

 

Big washers on the outside under the bolt heads and away you go.  Remember to put the bolt on the outside and not the nut with the thread showing through.....bugger to remove with a knackered thread.

 

errr you are both right and wrong. it does not matter.

 

check DWGs No 13 and 13(a) in your blue book.

[nicklouse]

In my opinion any strength you might loose will be replaced by the cage..

And yes plates on the inside it's very common to see them on the outside but that is wrong..

see above.

[mini-geek]

Ok smarty pants it's obvious I wrote that after you started to post


Anyway it's obvious looking at the plates supplied by safety devices that it's designed to be internally welded so that in that instance is the correct method.

Edited by mini-geek, 14 February 2017 - 05:29 PM.

[rally1380]

Yes according to the blur book they can be mounted either side of the panel.

If you think about the physics in a roll over and the forces applied to the base of these legs there is only one way I'd be wanting to mount the plates for my own peace of mind.

When the blur book allows both ways, I think common sense needs to be used.

[morley]

I asked the question on another forum and all the hillclimb guys said to weld the spreader platers on the inside so that's good enough for me!

[nicklouse]

Lol. It makes no difference you are welding them on.

If you were bolting them on then it would make a big difference. Well it would make a big difference if you are crap at welding as well.

Having the spreader plate inside or out side makes Zero difference when welded.

Think about it.

[rally1380]

Lol. It makes no difference you are welding them on.

If you were bolting them on then it would make a big difference. Well it would make a big difference if you are crap at welding as well.

Having the spreader plate inside or out side makes Zero difference when welded.

Think about it.

I have and I disagree with you.