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- Pre-slotted metal strips attached to the wall, preferably into wall studs.
- Can be attached with toggle bolts or similar fasteners approximately 16” apart.
- If the standards are further than 16” apart, the shelves may not support heavy loads.
- A newer variation includes a mounting rail that is fastened across the studs. The standard then clips directly into the rail or may require an adapter. Usually requires a fastener at the bottom for stability.