Base plate
A component used at the bottom of a supported scaffold to distribute load into the supporting surface.
Explore related base plate guidance →Reference directory
Scaffold Glossary
Plain-language definitions with direct paths to deeper safety, selection, product, and parts information.
Caster
A wheel assembly used on a mobile scaffold; exact attachment and system compatibility must be verified.
Explore related caster guidance →Competent person
Under OSHA’s construction scaffold definitions, a person capable of identifying existing and predictable hazards and authorized to take prompt corrective measures.
Explore related competent person guidance →Cross brace
A rigid diagonal connection that helps hold scaffold members in a fixed relationship; it is not climbing access.
Explore related cross brace guidance →Double-width scaffold
A scaffold product format with a broader footprint and platform arrangement than a single-width format; verify exact system dimensions.
Explore related double-width scaffold guidance →Guardrail
Part of a barrier system that can include toprails, midrails, and posts around exposed platform edges.
Explore related guardrail guidance →Horizontal brace
A rigid connection installed horizontally in the system-specific position defined by the applicable instructions.
Explore related horizontal brace guidance →Mobile scaffold
A powered or unpowered portable supported scaffold mounted on casters or wheels.
Explore related mobile scaffold guidance →Outrigger
A component that extends a support relationship for an approved configuration; it is not a universal substitute for complete stability review.
Explore related outrigger guidance →Platform
The elevated surface that supports workers, materials, or both as part of the scaffold assembly.
Explore related platform guidance →Scaffold frame
A fabricated structural frame used with compatible components in an approved scaffold configuration.
Explore related scaffold frame guidance →Scaffold tag
A site-program communication device used to identify status, inspection information, or restrictions; colors and procedures vary.
Explore related scaffold tag guidance →Single-width scaffold
A narrower scaffold product format selected around verified dimensions, task, access, and configuration.
Explore related single-width scaffold guidance →Stabilizer
A system-specific component used as part of a defined stability configuration.
Explore related stabilizer guidance →Toe board
A barrier at platform level used in falling-object protection planning where applicable.
Explore related toe board guidance →Tower
A vertically assembled scaffold configuration; platform height, working height, and overall height are distinct measurements.
Explore related tower guidance →Upright
A vertical scaffold member that transmits load through the supporting assembly.
Explore related upright guidance →Working platform
A platform used as a work level rather than only as a walkway or access transition.
Explore related working platform guidance →