Jeff Lindsey

as far as I can tell, it's illegal for me to build any permitted structure out of the dying alder trees on my property. For a structure to be within code, it must be made of graded and stamped lumber. It is possible to hire a grader to come out to your property and stamp your fir, or ceder, or pine, or hemlock, but no "hardwoods".‚ [/quote wrote:

I can see why the codes might not allow structural use of alder. I have the same issue, and lots of alder.
Have you considered cord wood construction using alder? Built within a post and timber frame. Lets you use your wood for some rock solid construction. Cord wood built like that is often permissible under the codes, but you'd have to check your jurisdiction.

This is not the forum for a bunch of complex legal argument, but I would hesitate to use a barrier  that obviously had a lot of work or thought put into it.

People typically use large rocks or boulders for this.

I understand that you are trying to reduce injury. That's commendable. The path to liability is often paved with commendable good intentions.

Maybe instead of a custom solution, drive around, and use whatever solution is common in your jurisdiction. Common practice is always a defendable position.

If you plant a living wall behind the boulders, maybe you can remove the boulders in a few years.

Best of luck!

You may find parts at one of the few ship's chandlery's that still exist.

That's a lifetime supply of raw material for  "Dough balls" fish bait, which is excellent bait for catfish/carp.

Invasive carp are a big problem, can taste good, compost well, and are a lot of fun to take on lighter tackle.

Fish your surplus away!

Further note- you can get torque limiting extensions for your impact driver, which means that if you get one that stops tightening the socket at 75 pounds, you can forego the torque wrench. Those are often puzzling to the novice.

Your local auto-parts store may have a rental torque wrench  for your use, and is often a good source for info.

You cannot watch too many youtube videos on this. Take note of the tools being used, and get the ones you need before starting. If you have a tablet, it can really help to have a video cued up while you are working on the car.

Harbor freight is having a 15% off sale on any single item this weekend for their shopping club members. That is an excellent time to pick up one of their Daytona  floor jacks. A floor jack is much easier to use than the type of jack you have in your trunk or a pioneer jack. The floor jacks are heavy, so if you are not strong, arrange some help getting it out of your car.

Jack and jack stands are necessary for this work.  You'll want to loosen the lug nuts on the tire before jacking it up. If you have one, any good impact driver with a socket that fits your lug nuts will save your muscle power.

Brake parts cleaner will also come in really handy, along with a supply of clean rags. HF also sells magnetic parts trays. Those can be a life saver.

Start early in the morning, on a day when your local auto-parts store is open.
Use your phone to take pictures of everything before you mess with it, so you have a visual guide to re-assembly.

Be aware that most auto-parts do not come with assembly instructions.

You can do this.
Safety first.

I am fortunate in that if I cut down a dead alder tree- and I am cutting down many this rainy season- the oysters will just grow heavily within weeks.

I have better results if the log is not completely flat on the ground but elevated on one end a few feet up, and if I score the bark in a few places.

Best of luck with your cultivation!

https://www.epa.gov/hw/end-life-solar-panels-regulations-and-management

Some guidance in there.
Everyone’s experience with technology and product safety should support the ideas of :
(1)Taking the manufacturers claims of safety with a grain of salt
(2) Not integrating the panels into direct contact with soil/water until their safety is proven.

I’m not trying to rain on anyone’s parade here, and I have had posts removed for trying to advise caution over hope in sensitive matters- but remember the historical record concerning other products claimed to be environmentally safe.

I think Timothy Norton is correct.

Diesel is common, lots of parts availability, many bools/videos, and non explosive.

Much easier DIY repair and much easier to source local repair if a problem.

Propane explosions were not uncommon when I lived in RV parks for several years. Almost all were caused by poor DIY or a lack of local repair services.    

Any off the grid solution that you can't repair isn't really off the grid.