CSCS Scaffolding Basic flashcards
CSCS Scaffolding Basic · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Competent person
- An individual capable of identifying existing and predictable hazards in the surroundings and authorized to take prompt corrective measures to eliminate them.
- Qualified person
- A person who, by recognized degree, certificate, professional standing, or extensive knowledge and experience, can design and evaluate scaffolds and their components.
- Maximum intended load
- The total load of all workers, equipment, tools, materials, and other loads the scaffold is designed to support at any one time.
- Scaffold definition
- Any temporary elevated platform, and its supporting structure, used for supporting employees or materials or both.
- Light-duty rating
- A scaffold load rating of 25 pounds per square foot, suitable for light work such as painting and finishing.
- Medium-duty rating
- A scaffold load rating of 50 pounds per square foot, used for general construction work with moderate material loads.
- Heavy-duty rating
- A scaffold load rating of 75 pounds per square foot, used for masonry and other work requiring heavy materials.
- Four-times rule
- Each scaffold platform span must support its own weight plus at least four times the maximum intended live load.
- Wind load
- The horizontal force exerted by wind on the exposed area of a scaffold, resisted by ties, braces, and anchorage.
- Eccentric loading
- Concentrating material or workers on one side of a platform, creating overturning moment and instability.
- Mudsill
- A wood or concrete member placed under base plates to distribute scaffold leg loads over a larger ground area.
- Screw jack
- An adjustable scaffold leg base that levels the scaffold and transfers load to base plates and sills.
- Cross brace
- A diagonal member connecting scaffold frames or posts to provide lateral stability and resist racking.
- Swivel coupler
- A tube-and-coupler scaffold fitting that joins two tubes at any angle other than 90 degrees.
- Right-angle coupler
- A tube-and-coupler scaffold fitting that joins two tubes at a 90-degree angle, typically for ledgers and standards.
- Platform planking
- Scaffold-grade lumber, typically nominal 2x10 or wider, laid tightly to form the walking surface; unpainted to reveal defects.
- Guardrail height
- The toprail of a scaffold guardrail system must be 38 to 45 inches above the platform surface, with a midrail.
- Midrail placement
- The midrail is installed approximately halfway between the toprail and platform, or between 21 and 27 inches above the platform.
- Toeboard height
- A toeboard must be at least 3.5 inches high and installed at the platform edge to prevent falling objects.
- Fall protection threshold
- Guardrails or personal fall arrest systems are required for scaffolds more than 10 feet above a lower level.
- Platform width
- Each scaffold platform must be at least 18 inches wide, with limited gaps between the platform and the structure.
- Tie spacing
- Ties anchoring a scaffold to the structure are commonly placed at intervals of about 30 feet horizontally and 26 feet vertically.
- Plumb and level
- Scaffolds must be erected so that posts are vertical and platforms are horizontal, checked with a spirit level during erection.
- Guy wire
- A tensioned cable used to stabilize a scaffold against lateral loads when structural ties are impractical.
- Outrigger
- A scaffold member extending outward from the base to increase the effective base width and resist overturning.
- Foundation bearing
- The ground or structure under a scaffold must support the fully loaded scaffold without settlement or displacement.
- Shift inspection
- A competent person must inspect the scaffold before each work shift and after any alteration or event affecting its integrity.
- Green tag
- A tag placed on a scaffold indicating that a competent person has inspected it and it is safe for use.
- Red tag
- A tag placed on a scaffold indicating it is unsafe or incomplete and must not be used until re-inspected.
- Overloading
- Loading a scaffold beyond its rated capacity, which can cause structural failure or collapse.
- Power line clearance
- Scaffolds must maintain at least 10 feet of clearance from energized power lines unless the lines are de-energized and grounded.
- Suspension trauma
- A medical emergency that can occur when a worker hangs motionless in a fall-arrest harness, requiring prompt rescue.