Admixtures, epoxies, fuels, and coatings follow crews from site to site — and the sheet obligation follows them. SDS HQ turns the paper binder into a QR poster on the trailer door: any phone reaches the current sheet, and a printed set covers the dead zones.
Each jobsite needs its own accessible set; the office copy doesn’t count.
Multi-employer sites mean sheets flowing in both directions.
Access has to work from a phone — and from paper when it can’t.
Host your library free. Add sites and crews as the work moves.