Jack stand substitute

I'll use wood cribbing, usually 6" X 6" (cross stacked), if I'm underneath for an extended project or all the wheels are removed. I use jack stands under everything else, even when using a jack to remove one wheel. MBU's (cement block) are better used for supporting things that are stationary and have a substantial mating surface. If used under a steel axle or frame, they can crack and break. I've seen it happen.

Just another "please don't use cinder blocks".
As suggested earlier, you can rent the real deal for just a few dollars and a huge amount of piece of mind.

cinder blocks are for walls. they are only average for that use. please dont use them for support of any kind of vehicle.
you can rent jack stands from a local rental shop. at least you can in chino valley az. thats the nearest one to me.
there is no substitute for good safety practices. ive seen all kind of accidents happen because the injured party did something dumb. i have one less knuckle on my right hand doing just that. a table saw does not play favorites.
it takes only a second of bad thinking to give you a lifetime of pain, or worse
kill you.
is your life only worth a few dollars??? how about your wife and family. overboard thinking? maybe, but these types of things kill people all the time.

Take a close look at the surface you're going to work on. I've seen heavily-loaded jackstands punch into thin asphalt. Wood cribbing is the better option in such cases. Even on a level surface, I'd chock the wheels at the other end.

Jim, "I drink coffee for your protection."

I have a assortment of 4"x 6" and 5"x 5" barn poles and RR ties cut up in 2' and 3' lengths for blocking up any vehicle on my place.

My 11200 lb 5er is setting on four stacks right now with the wheels pulled waiting for me to mount its new brake shoes. Each rr tie stack is at different angles to eliminate them from rolling.

I use 4 jacks like the pic when I rotate tires or do brake jobs but if I have to go under the truck I add my cribbing at each end.

Concrete blocks are safe if used on a hard flat surface like mobile homes are set up on or our older homes use. But I sure wouldn't put a lot of weight on one thats sitting on just the ground.

Burb was actually quite stable sitting like that. Pushing with my full weight crom the side wouldn't rock it at all. I also had two more jack stands that I mived around by where I was working so that there was always a secondary support. The rear stands are the HF 6 tons with a 12 x 12 footprint more than adequate for their height. They are not fully extended here.

Naw, let them be used by those who will, we need them out of the gene pool.