Sprinkler head obstructions in storage rooms

Storage stacked too close to sprinkler heads — the 18-inch clearance rule — is one of the most common building cites, and it reappears the week after you clear it. Tenant storage rooms are the worst. What has actually worked for you: cages, painted floor lines, lease language, or scheduled sweeps?

The eighteen inches below a sprinkler head might be the most re-cleared space in affordable housing. You sweep it, you photograph it, and by the next month somebody's holiday decorations are stacked right back into the deflector zone. Painted floor lines help until they get ignored; lease language helps at signing and fades by winter. What has actually worked to keep storage off the sprinkler clearance — or does it drift back no matter what you try?