Considering they had the narrow leg of the ladder sitting on the edge/side of the brick, I'm shocked they didn't crush under the pinpoint weight...I wouldn't question integrity as much if they remembered to put construction adhesive between those bricks. But even then those brown ones with holes crumble apart if you breath on them from the wrong angle.
Not probably ... are! And it's not really a stretch to say so!Harbor Fright jack stands are probably safer than this!
Filled of course... the extra weight makes 'em more stable!!!! ⚡💥🔥I'm sure the propane tanks for the base make it safe.