Module 6 (Construction Class)

Warning yarn:

A component of the sling that shows the rigger whether the sling has suffered too much damage to be used.

Bridle:

A configuration using two or more slings to connect a load to a single hoist hook.

Threaded shank:

A connecting end of a fastener, such as a bolt, with a series of spiral grooves cut into it.

Hoist:

A device that applies a mechanical force for lifting or lowering a load.

Lifting clamp:

A device used to move loads such as steel plates or concrete panels without the use of slings.

Sheave:

A grooved pulley-wheel for changing the direction of a rope's pull; often found on a crane.

Strand:

A group of wires wound, or laid, around a center wire, or core. Strands are laid around a supporting core to form a rope.

Sling reach:

A measure taken from the master link of the sling, where it bears weight, to either the end fitting of the sling or the lowest point on the basket.

Qualified person:

A person who has gained the knowledge , training , and experience and is able to solve problems relating to the subject matter, the work, or the project.

Wire rope:

A rope made from steel wires that are formed into strands and then laid around a supporting core to form a complete rope; sometimes called cable.

Block and tackle:

A simple rope-and-pulley system used to lift loads.

Bull ring:

A single ring used to attach multiple slings to a hoist hook.

Plane:

A surface in which a straight line joining two points lies wholly within that surface.

Competent person:

An individual who is authorized to take prompt corrective measures to eliminate existing and predictable hazards.

Rigging hook:

An item of rigging hardware used to attach a sling to a load.

Synthetic slings must be inspected:

Before every use.

A hitch configuration that allows slings to be connected to the same load without using a spreader beam is a:

Bridle hitch.

Core:

Center support member of a wire rope around which the strands are laid.

Tattle-tail:

Cord attached to the strands of a endless loop sling. It protrudes from the jacket. It is used to determine if an endless sling has been stretched or overloaded.

Shackle:

Coupling device used in an appropriate lifting apparatus to connect the rope to eye fittings, hooks, or other connectors.

The type of wire rope core that is susceptible to heat damage at relatively low temperatures is the:

Fiber core.

Chain hoists are able to lift heavy loads by utilizing a:

Gear system.

A piece of rigging hardware used to couple the end of a wire rope to eye fittings, hooks, or other connections is a(n):

Hitch.

To make the Emergency Stop signal that is used by riggers, extend both arms:

Horizontally with palms down and quickly move both arms back and forth.

Before attempting to lift a load with a chain hoist, make sure that the:

Load is properly balanced.

Identification tags for slings must include the:

Manufacturer's name or trademark.

An alloy steel chain sling must be removed from service if there is evidence that:

Replacement links have been used to repair the chain.

Tag line:

Rope that runs from the load to the ground.

Rejection criteria:

Standards, rules, or tests on which a decision can be based to remove an object or device from service because it is no longer safe.

A lifting clamp is most likely to be used to move loads such as:

Steel plates.

One-rope lay:

The lengthwise distance it takes for one strand of a wire rope to make one complete turn around the core.

Master link:

The main connection fitting for chain slings.

Rated capacity:

The maximum load weight a sling or piece of hardware or equipment can hold or lift; also referred to as working load limit (WLL).

Sling legs:

The parts of a sling that reach from the attachment device around the object being lifted.

Hitch:

The rigging configuration by which a sling connects the load to the hoist hook. Three basic types of hitches: vertical, choker, and basket.

Load control:

The safe and efficient practice of load manipulation, using proper communication and handling technique.

Load stress:

The strain and tension applied on the rigging by the weight of the suspended load.

Load:

The total amount of what is being lifted , including all slings, hitches, and hardware.

Splice:

To join together.

Sling:

Wire rope, alloy steel chain, metal mesh fabric, synthetic webbing, or jacketed synthetic continuous loop fibers made into forms, with or without end fittings, used to handle loads.

Unstranding:

describes wire rope strands that have become untwisted This weakens the rope and makes it easier to break.