Other solution I've seen to the trip hazard is the racks only ride on a single angle iron track that is out of the walk path...so here would be the back. Using non swivel casters on that v track and standard casters riding on the floor works to get them inline while reducing the trip hazard
That's a great workaround that eliminates the trip hazard.
Ideally, I wouldn't have to make holes in the basement or garage slabs to bolt an angle iron track. Potential workarounds for that:
1. Use 4 rigid/non-swivel casters per shelving rack. I'm guessing if this works, many people would already be doing this. Any deviations from perfectly straight, and it would be a real pain to get the shelving rack back on the line.
2. Similar to the solution you mentioned in last post, but maybe we can avoid lag bolting the angle iron to the floor by making the shelving racks at either end fixed. Then angle iron is secured to rear of both fixed racks. All the interior racks get 2 V-groove casters at the rear that ride on the angle iron. All interior racks get 2 swivel casters at the front that ride on the floor. Seems like this could work, but maybe a bit tricky to get load balanced between front (swivel casters on ground) and rear (V-groove casters on angle iron).
3. Use 4 swivel casters per shelving rack on bottom. Use 1 angle iron track on top - either mounted to ceiling or, if you have fixed shelving racks at either end of the array, mount the track to top of these end racks. Then have 1 V-groove caster per moving/non-fixed shelving rack that runs along the track. Seems like this could work, and possibly easier than #2, since load is naturally balanced on 4 equal casters, and track bears no weight and is only used to guide the swivel casters. Use only one angle iron track because (1) you only need one to guide the swivel casters to the correct orientation, and (2) you avoid all the hassle of ensuring the second track is perfectly parallel to the first track (if not near perfect, the V-groove casters will bind).
Any of these, assuming they work, would eliminate trip hazard and be non-permanent/no holes in slab.
Anyone have thoughts on this?