Outer Limits 4x4 Board

I always use and recomend timber for supporting the car when you need to work under it-

Your keen!!!

dogbreath_48 wrote:

jessie928 wrote: what happens if you have a brick or a paved driveway for gods sake?

You should put something under the stands to spread the weight over a number of bricks, IMO.

exactly right. there should not be a brick being in direct contact with the stand. put a lump of hardwood between them. your average jack stand only has 4 bits of right angle steel in contact with the ground. say 5mm thick, 50mm long each corner. thats only 10cm square in contact with the ground. at best.

you hit a brick with a flat edge with that much surface area, and it wont take much force to split it.


stop being a fcukwit and arguing that something that is known to be unsafe, is indeed safe. BECAUSE ITS NOT!!!!


there is a reason cranes ALWAYS have wood under their support stands, regardless of what surface they are on...

RUFF wrote:I always use and recomend timber for supporting the car when you need to work under it-

At least he chocked the wheels.

macca81 wrote:

dogbreath_48 wrote:

jessie928 wrote: what happens if you have a brick or a paved driveway for gods sake?

You should put something under the stands to spread the weight over a number of bricks, IMO.

exactly right. there should not be a brick being in direct contact with the stand. put a lump of hardwood between them. your average jack stand only has 4 bits of right angle steel in contact with the ground. say 5mm thick, 50mm long each corner. thats only 10cm square in contact with the ground. at best.

you hit a brick with a flat edge with that much surface area, and it wont take much force to split it.


stop being a fcukwit and arguing that something that is known to be unsafe, is indeed safe. BECAUSE ITS NOT!!!!


there is a reason cranes ALWAYS have wood under their support stands, regardless of what surface they are on...

No need for name calling.

The reason they use timber under a crane is weight. You try getting a human being to haul about a lump of just about anything else compeared to a piece of plywood for similar load bearing ability .. It is also becasue the wood will deform under load and mate itself to the suface it is on reducing the chance of slip and point loading.

best not park on any brick driveways ... your dead for sure ... keep away from brick buildings .. will surely collapse.


Using the correct tool for the job is a much better idea .. timber packers are far better than brick, a proper chassis stand is far better than timber packers as the base is correct for the height of the stand.
But a bricks in sound condition will support alot of weight. The humble old average boral house brick has the ability to support between 15 to 35 MPa .. if I remember correctly 15MPa is something like 2500psi ... thats alot of load.

macca81 wrote:

dogbreath_48 wrote:

jessie928 wrote: what happens if you have a brick or a paved driveway for gods sake?

You should put something under the stands to spread the weight over a number of bricks, IMO.

exactly right. there should not be a brick being in direct contact with the stand. put a lump of hardwood between them. your average jack stand only has 4 bits of right angle steel in contact with the ground. say 5mm thick, 50mm long each corner. thats only 10cm square in contact with the ground. at best.

you hit a brick with a flat edge with that much surface area, and it wont take much force to split it.


stop being a fcukwit and arguing that something that is known to be unsafe, is indeed safe. BECAUSE ITS NOT!!!!


there is a reason cranes ALWAYS have wood under their support stands, regardless of what surface they are on...

look, im only going to warn you once about name calling you turd. Being a keyboard superhero is easy isnt it?


if you are able, read my post and you will clearly see that i mentioned a FLAT base.

JEs

love_mud wrote:Using the correct tool for the job is a much better idea .. timber packers are far better than brick, a proper chassis stand is far better than timber packers as the base is correct for the height of the stand.

I think the original question was what to put under the axle stands. In this case it was to raise the height which isn't perfect but if the base inserted under the stand is wide enough i don't see a problem?

Also i would have thought using axle stands (often with small feet) would point load the bricks - and in many cases the bricks aren't supported all that well underneath (but i suppose that depends who made the driveway ) so a piece of timber under the axle stand (not nessecarily raising it much) would be a good idea - to spread the load evenly over a number of bricks (as opposed to point loading on 4 bricks) and as you mentioned it may deform slightly to allow even better load spread.

I'm not sure if i'm actually arguing with anyone or making any original points anymore

love_mud wrote:

macca81 wrote:

dogbreath_48 wrote:

jessie928 wrote: what happens if you have a brick or a paved driveway for gods sake?

You should put something under the stands to spread the weight over a number of bricks, IMO.

exactly right. there should not be a brick being in direct contact with the stand. put a lump of hardwood between them. your average jack stand only has 4 bits of right angle steel in contact with the ground. say 5mm thick, 50mm long each corner. thats only 10cm square in contact with the ground. at best.

you hit a brick with a flat edge with that much surface area, and it wont take much force to split it.


stop being a fcukwit and arguing that something that is known to be unsafe, is indeed safe. BECAUSE ITS NOT!!!!


there is a reason cranes ALWAYS have wood under their support stands, regardless of what surface they are on...

No need for name calling.

The reason they use timber under a crane is weight. You try getting a human being to haul about a lump of just about anything else compeared to a piece of plywood for similar load bearing ability .. It is also becasue the wood will deform under load and mate itself to the suface it is on reducing the chance of slip and point loading.

best not park on any brick driveways ... your dead for sure ... keep away from brick buildings .. will surely collapse.


Using the correct tool for the job is a much better idea .. timber packers are far better than brick, a proper chassis stand is far better than timber packers as the base is correct for the height of the stand.
But a bricks in sound condition will support alot of weight. The humble old average boral house brick has the ability to support between 15 to 35 MPa .. if I remember correctly 15MPa is something like 2500psi ... thats alot of load.

But focus the load on one section of the brick. That's why a little tap from a bricky trowel will brake a brick in half and why bricks break when you drop them.

Please don't use bricks unless you are as thick as one.(This is just a joke and not directed at anyone so no-one take offense)

Shane

jessie928 wrote:

macca81 wrote:

dogbreath_48 wrote:

jessie928 wrote: what happens if you have a brick or a paved driveway for gods sake?

You should put something under the stands to spread the weight over a number of bricks, IMO.

exactly right. there should not be a brick being in direct contact with the stand. put a lump of hardwood between them. your average jack stand only has 4 bits of right angle steel in contact with the ground. say 5mm thick, 50mm long each corner. thats only 10cm square in contact with the ground. at best.

you hit a brick with a flat edge with that much surface area, and it wont take much force to split it.


stop being a fcukwit and arguing that something that is known to be unsafe, is indeed safe. BECAUSE ITS NOT!!!!


there is a reason cranes ALWAYS have wood under their support stands, regardless of what surface they are on...

look, im only going to warn you once about name calling you turd. Being a keyboard superhero is easy isnt it?


if you are able, read my post and you will clearly see that i mentioned a FLAT base.

JEs

in direct reference to using stands on bricks, then you should have something underneath the stand that is NOT brick. i was not speaking about a flat base, i was talking about you standard stands which do not have a flat base. the point im making is dont use bricks underneath stands, its just plain unsafe. i can see that you are desperatly trying to justify to yourself that its fine to do, but i am sure that you will change your mind quickly when you see a brick break that has a car on it... i used to think like you untill i saw what can happen also, and im not the only one on here who has seen it happen. ask how many people have seen a piece of hardwood crush enough to have the stands fall off them....

and isnt it abit hypocritical to tell me off for name calling and in the same sentence call me a name??

love_mud wrote:But a bricks in sound condition will support alot of weight. The humble old average boral house brick has the ability to support between 15 to 35 MPa .. if I remember correctly 15MPa is something like 2500psi ... thats alot of load.

15MPa is (round figures) 150 atmospheres, which (mental arithmetic, with rounding) is around 2200psi.

However, you're presuming a perfectly flat base on the jack stand on a perfectly flat brick, on a perfectly flat surface. I don't know about your jack stands, but mine aren't perfectly flat - they tend to have four contact points on a concrete surface, and I'd guess your average brick would also have a number of contact points. So your loads are now being focused on points rather than evenly spread, and that can send your pressures sky-rocketing. 500kg on one square centimetre is way more than 2200psi.

love_mud wrote:best not park on any brick driveways ... your dead for sure ... keep away from brick buildings .. will surely collapse.

I'm sure you can spot the flaws in your cynicism here.

If anybody must insist on using bricks, place a sheet of ply above and below, to help spread the load and reduce pressure points. And, while you're at the hardware store buying the ply, check out their hardwood off-cuts.

-Scott- wrote:

love_mud wrote:But a bricks in sound condition will support alot of weight. The humble old average boral house brick has the ability to support between 15 to 35 MPa .. if I remember correctly 15MPa is something like 2500psi ... thats alot of load.

15MPa is (round figures) 150 atmospheres, which (mental arithmetic, with rounding) is around 2200psi.

However, you're presuming a perfectly flat base on the jack stand on a perfectly flat brick, on a perfectly flat surface. I don't know about your jack stands, but mine aren't perfectly flat - they tend to have four contact points on a concrete surface, and I'd guess your average brick would also have a number of contact points. So your loads are now being focused on points rather than evenly spread, and that can send your pressures sky-rocketing. 500kg on one square centimetre is way more than 2200psi.

love_mud wrote:best not park on any brick driveways ... your dead for sure ... keep away from brick buildings .. will surely collapse.

I'm sure you can spot the flaws in your cynicism here.

If anybody must insist on using bricks, place a sheet of ply above and below, to help spread the load and reduce pressure points. And, while you're at the hardware store buying the ply, check out their hardwood off-cuts.

Well said

jessie928 wrote:what happens if you have a brick or a paved driveway for gods sake?

Have a good look at a brick or paved driveway on which jack stands are used. How many bricks or pavers are cracked?

When these bricks crack, what happens? Can they move sideways? How far can the jack stand fall before it strikes something solid again?

You're also talking about bricks which are laid on something like bedding sand, which will distribute forces nicely. Place the same bricks on a concrete surface, and how even distributed will the compression forces be?

Don't use bricks. You've been lucky. How long before that luck runs out?

bravo scott, your last 2 posts are the best we have yet seen in this thread. well said

Scott's the man

Anyone know where i can get 1 meter stands? all those bricks holding up the house might shatter any minute :o

if your handy with a welder, go to the wreckers grab some old rims. lay one flat sit the other into standing up and start welding.

i worked at a wreckers a while ago and theses worked a treat.



or if you have a winch watch a movie called The gods must be crazy.

4WD Stuff wrote:

RUFF wrote:I always use and recomend timber for supporting the car when you need to work under it-

At least he chocked the wheels.

what I want to know is how did he get it up that high in the first place to be able to use timber?

shorty_f0rty wrote:

4WD Stuff wrote:

RUFF wrote:I always use and recomend timber for supporting the car when you need to work under it-

At least he chocked the wheels.

what I want to know is how did he get it up that high in the first place to be able to use timber?

6 big blokes

macca81 wrote:

shorty_f0rty wrote:

4WD Stuff wrote:

RUFF wrote:I always use and recomend timber for supporting the car when you need to work under it-

At least he chocked the wheels.

what I want to know is how did he get it up that high in the first place to be able to use timber?

6 big blokes

Nah, he chocked the strut, and reversed it up...

-Scott- wrote:

love_mud wrote:But a bricks in sound condition will support alot of weight. The humble old average boral house brick has the ability to support between 15 to 35 MPa .. if I remember correctly 15MPa is something like 2500psi ... thats alot of load.

15MPa is (round figures) 150 atmospheres, which (mental arithmetic, with rounding) is around 2200psi.

However, you're presuming a perfectly flat base on the jack stand on a perfectly flat brick, on a perfectly flat surface. I don't know about your jack stands, but mine aren't perfectly flat - they tend to have four contact points on a concrete surface, and I'd guess your average brick would also have a number of contact points. So your loads are now being focused on points rather than evenly spread, and that can send your pressures sky-rocketing. 500kg on one square centimetre is way more than 2200psi.

love_mud wrote:best not park on any brick driveways ... your dead for sure ... keep away from brick buildings .. will surely collapse.

I'm sure you can spot the flaws in your cynicism here.

If anybody must insist on using bricks, place a sheet of ply above and below, to help spread the load and reduce pressure points. And, while you're at the hardware store buying the ply, check out their hardwood off-cuts.

I dont use jackstands ... only bricks

And as far as the driveway stuff .. I was being saracstic I should have added a wink at the end.

I normally use hardwood packers .. but I have been known to use combinations .. my shed has a wood heater in it .. and the hardwood makes it oh so toasty warm ... bricks dont seem to burn so well ...


But I have my eye on some "proper" stands ... and I have made a "lift kit" cradle for my trolley jack to help it reach high enough to jack stuff up a lifted big tyred 4x4.