Hanging shelf for air compressor

[penright]

http://www.rhinoshelf.com/

Here is a blog post describing how they design it.
http://www.rhinoshelf.com/blog-posts/blog-post-1

Here is a snipet and explains what the concerns about connecting to rafters and why they did not.
The ceiling hung option washed out almost immediately. ... Then we ran into one additional drawback. With the advent of new engineered joist and truss components, and the new building codes that accompanied them, the load capacity of the system was reduced by at least 67% and potentially as high as 75%. Further, the companies that were manufacturing the joist/truss systems told us in no uncertain terms that fastening anything to their joists would be considered an impermissible modification and would void their warranty. Done!


Then they talked about why a under shelf diagonal brace was not chosen
The stiff-knee design tended to buckle over time under static compression unless the diagonal component was reinforced to an uneconomical or cumbersome degree.

These are just snippets, if you are thinking about copying the design, it might be a good idea to read the engineering that goes into the web site picture.

 

[Jeepwx03]

Thought I'd share. Built this out of 1.5" square tube.

 

[no704]

Ya could put a post on a footer in the wall and a beam on top sticking thru to outside with a counter weight on it.

 

[Leaflessshadetree]

Thought I'd share. Built this out of 1.5" square tube.

I like that idea

 

[86turbodsl]

You might look at a span of pallet rack. You can get it in 36 inch, 42 inch or 48 inch wide. Beams can be 8 feet, 9 feet or 12 feet. of course this would put a post in the middle of the floor, however it will be able to hold whatever you want to put on it.

I have about 60 feet of it along one wall of my shop, holding probably 5-10 tons of stuff.

This is a good idea.