I bought a truck load of boltless shelving a few years, ok a decade, back and learned that there was a dozen brands that didn't interchange parts and what I had was a mixed lot extra bits. I bought from these two places;
http://www.momentumoffice.com/pages/rapidshelf.html
Shelf Master inc. 2837 E Coronado St, Anaheim, CA 92806
Thanks. That's great. Those two places aren't too far away. They look like they might have some good stuff. What kind of prices did you pay, approx., if you don't mind me asking?
Yes, I've noticed all the different makers (and designs -- some of them proprietary??) out there. I like the tear-drop style. (Though there might be a couple of different ones that are of the "tear-drop" type as well!)
I've seen info-graphics on the web that list the dozens of different types. For those searching these things out (and for those not familiar with all the types of fastening) it might be worth seeking out a graphic of the different types for reference.
I've picked up some shelving from these guys over the past 30 years:
https://actionwp.com
And it's held up (I always get the extra support braces along the depth of the shelving). I wasn't so happy with the rolling shelving (with casters) I got from them. Most of the time, we've made our own. But I needed one quick, and tried it. The underlying frame wasn't straight and one ours had sloppy welds, and the caster rigs didn't square up. We fixed it, but I'd rather have it work outta the box. I imagine it was just bad QC and luck of the draw as everything else I've gotten has been good.
I had considered getting the new pallet racking from them -- the price looked good, but thought so much of this stuff is on the used market and it's probably really good quality compared to what the new stuff of equivalent quality costs, that I've been meaning to check out.
I had checked CL used ads, but most of the locations that the ads refer to are pretty far from our area (Long Beach/Port of LA) that I just haven't been able to make time for a 1/2-3/4 of a day trip.
I thought I'd try one row out -- and like the ones that are 40-48" deep, and 96-108" long and about 108" tall.
Here was something else I saw from web. I had no idea that the pallet racking had this many little trick sets ups for barrels, reels, and the like.
I got it from here:
http://www.americansurplus.com/used_equipment/9/pallet_racking/30/pallet_rack
Unfortunately, they are in Providence. But the website is useful and informative. If I were buying in bulk (say to cover an entire large warehouse) used, it might actually be worth paying the freight to get it across the country, but not for just one row of 100-200' worth. Still, if you live near Providence, this looks like a hell of a place with a hell of a selection.