Section 3.18
Scaffold Safety
Glossary
Access: The point at which a person can get to and exit a
scaffold.
Base Plates: A component of a scaffold located on the foot of
a pole or frame to assist in stabilizing the scaffold.
Bracing: A rigid connection that holds one scaffold member in
a fixed position with respect to another member, or to a building or structure.
Competent Person: One who is capable of identifying existing and predictable hazards or working conditions which are
unsanitary, hazardous or dangerous to employees, and who has authorization to
take prompt corrective measures to eliminate them.
Galvanic Action: A reaction which takes place that weakens the
strength of metals when two incompatible metals are placed together.
Guardrails: A vertical barrier, consisting of toprails,
midrails, and posts, erected to prevent employees from falling off of a scaffold
platform or walkway to lower levels.
Guying: A rope, chain or rod attached to something
as a brace or guide.
Hoist: A manual or power-operated mechanical device to raise
or lower a suspended scaffold.
Lanyard: A rope used for fastening.
Lean-to Scaffold: A supported scaffold that is kept erect by
tilting it toward and resting it against a building or structure.
Non-Adjustable Suspension Scaffolds: One or more stationary
platforms suspended by ropes or other non-rigid means from an overhead
structure.
Outriggers: The structural member of a supported scaffold used
to increase the base width of a scaffold in order to provide support for and
increased stability of the scaffold.
Platforms: A work surface elevated above lower levels.
Platforms can be constructed using individual wood planks, fabricated
planks, fabricated decks, and fabricated platforms.
Power-Operated Hoists: A hoist that is powered by other than
human energy.
Professional Engineer: A licensed person who has graduated from an engineering program accredited by the Accreditation Board for Engineering and Technology, has passed the Fundamentals of Engineering exam, gained four years of experience working under a Professional Engineer, and passed the Principles and Practice of Engineering exam.
Qualified Person: One who, by possession of a recognized
degree, certificate, or professional standing, or who by extensive knowledge,
training, and experience, has successfully demonstrated his/her ability to solve
or resolve problems related to the subject matter, work or project.
Rated Load: The manufacturer's specified maximum load to be
lifted by a hoist or to be applied to a scaffold or scaffold component.
Scaffolds: Any temporary elevated platform (supported or
suspended) and its supporting structure (including points of anchorage), used
for supporting employees or material or both.
Screw Jacks: A component of the scaffold that is attached to
the frame and the base plate and is used to assist in leveling the scaffold.
Sill: A horizontal piece that forms the lowest member or one
of the lowest members of a framework or supporting structure.
Shore Scaffold: A supported scaffold that is placed against a
building or structure and held in place with props.
Single-Point Adjustable Scaffold: A suspension scaffold
consisting of a platform suspended by one rope from an overhead support and
equipped with a means to permit the movement of the platform to desired work
levels.
Stall Load: The load at which the prime mover of a
power-operated hoist stalls or the power to the prime mover is automatically
disconnected.
Stilts: A pair of poles or similar supports raised footrests,
used to permit walking above the ground or working surface.
Suspension Scaffolds: One or more platforms suspended by ropes
or other non-rigid means from an overhead structure.
Tying: To fasten or attach.
Two-Point Adjustable Scaffold:
A suspension scaffold consisting of a platform supported by hangers
suspended by two ropes from overhead supports and equipped with a means to
permit the raising and lowering of the platform to desired work levels.