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What is the definition of J-hook?

A hook in the shape of the letter "J." J-hooks are designed for use with chains, hoists, and slings.

Learn more about J-hook in the class "Safety for Lifting Devices 135" below.

Safety for Lifting Devices 135

Safety Department

Class Information

Tooling U classes are offered at the beginner, intermediate, and advanced levels.
The typical class consists of 12 to 25 lessons and typically requires at least two hours of instruction time.

Class Name	Safety for Lifting Devices 135
Description	This class addresses lifting device and equipment safety requirements from the Occupational Safety and Health Administration and includes information about lifting devices and equipment commonly used for material handling, inspections, and testing.
Prerequisites	none
Difficulty	Beginner
Number of Lessons	18

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Class Outline

Class Objectives

Objectives

The Importance of Lifting Device Safety

Types of Lifting Devices for Material Handling

Slings

Slings: Safe Operating Practices

Hoists

Hoists: Safe Operating Practices

Portable Lifting Stands

Overhead and Gantry Cranes

Overhead and Gantry Cranes: Safe Operating Practices

Derricks

Lifting Equipment Safety: Chains, Cables, and Motors

Lifting Equipment Safety: Hooks and Eyebolts

Lifting Equipment Safety: Clamps, Magnets, and Baskets

Inspections for Lifting Devices

Operational and Rated Load Testing

Employer and Employee Responsibility

Summary

List the most common lifting devices used in industrial workplaces.

Identify lifting devices commonly used for material handling.

Describe slings.

Describe safe operating practices for slings.

Describe hoists.

Describe safe operating practices for hoists.

Describe portable lifting stands.

Distinguish between overhead cranes and gantry cranes.

Describe safe operating practices for overhead and gantry cranes.

Describe derricks.

Describe unsafe chains, cables, and motors.

Describe the safety features of hooks and eyebolts.

Describe the safety hazards of using clamps, magnets, and baskets.

Describe inspections required by OSHA for lifting devices.

Distinguish between operational and rated load tests.

Describe the employer and employee roles in maintaining a safe workplace.

Class Vocabulary

Term	Definition
alloy steel chain sling	A sling consisting of a master hook, chain links, and sling hooks. Alloy steel chain slings are durable and used for lifting heavy loads.
American Society for Testing and Materials	Also known as ASTM, the organization that develops standards for industry, government, and the environment to make products safer and more cost-effective.
ANSI	A private, non-profit organization that administers and coordinates voluntary standards and systems.
basket	A lifting device used to pick up loads without eyebolts, hooks, or fasteners. Baskets are used with tier-tote chains, which connect on the sides of the basket.
bolt	A cylindrically shaped, threaded device used for fastening parts. Bolts usually have blunt ends and mate with a nut.
boom	A timber or metal section of a strut that has its lower end hinged or pivoted at a fixed location on the mast while its upper end is supported by chains, ropes, or rods. A boom is necessary for lifting with hoists and ropes.
brace	A device that steadies or supports other components. Braces can be used instead of guys to secure a derrick.
bridge	The part of the crane which carries the trolley. Bridges consist of girders, trucks, end ties, footwalks, and the drive mechanism that carries the trolley.
bridge travel	The movement of a bridge on a crane. The bridge moves in a direction parallel to the crane runway.
cantilever gantry crane	A gantry or semigantry crane in which the bridge girders or trusses extend transversely beyond the crane runway on one or both sides.
clamp	A lifting device with teeth used for lifting loads that do not have eyebolts.
clamping device	A lifting device used to pick up loads without eyebolts, hooks, or fasteners.
clearance	The distance from any part of the crane to a point of the nearest obstruction.
crane	A lifting device used for the lifting and lowering and horizontal movement of a load with a hoisting mechanism. Cranes can be fixed or mobile and can be driven manually or powered.
derrick	A lifting device with a mast held at the head with guys or braces. Derricks come with or without a boom for use with a hoisting mechanism and operating ropes.
drum	A cylindrical unit, similar to a spool of thread, that holds wire rope for use with sheaves.
electromagnetic device	An object made magnetic by an electric current. Magnets used for lifting require a charge battery.
ergonomics	The study of designing devices to decrease operator discomfort or fatigue and increase productivity.
eyebolt	A threaded bolt with a forged hole or loop at one end.
forklift	A small vehicle used in manufacturing that contains a platform for lifting and transporting heavy loads.
frequent inspection	Inspections that occur at daily or monthly intervals depending on the degree of exposure to wear and deterioration and malfunction of critical components.
fuel line	Gasoline or diesel mechanisms that supply power to the lifting device.
gantry crane	A crane with a bridge supported on two or more legs running parallel on fixed rails.
grab	A lifting device used to pick up loads with tines or teeth. Grabs are either mechanical, hydraulic, or motorized.
grapple	A hook or claw used to pick up a load.
guarded	Components of a device that are not able to be accessed due to a fixed, interlocked, adjusting, or self-adjusting guard.
guy	A rope used to steady or secure the mast or another member in position.
hoist	A lifting device that exerts vertical forces for lifting and lowering. A hoist may be part of a crane.
hoist reeving	A system in which the hoist travels around drums and sheaves.
hoisting mechanism	The part of the lifting device that provides the vertical lifting and lowering motion and horizontal movement of a load.
hook	A lifting device used to pick up loads with eyebolts attached. Hooks are usually used with chains, hoists, and slings.
hydraulic	Power created by the motion and pressure of fluids.
hydraulic-powered boom	A lifting arm powered by the motion and pressure of fluids.
initial inspection	The first inspection of a new or modified lifting device in which all critical components are examined.
J-hook	A hook in the shape of the letter "J." J-hooks are designed for use with chains, hoists, and slings.
jib hoist	A hoist with a boom for added length for lifting specified loads. The jib may be in line with the boom or offset at various angles.
lifting device	A device that carries an object from one location to another. Lifting devices include cranes, hoists, and forklifts.
lifting medium	The component that provides the vertical raising and lowering of a load. Wire rope and chain are commonly used lifting mediums.
limit switch	A device used for making, breaking, or for changing the connections in an electric circuit.
load	The total superimposed weight on the load block or hook.
load rating	The maximum load for which a crane or hoist is designed. The load rating is determined by the manufacturer and displayed on the device.
load shifting	The change in the distribution of the weight of a load or objects that make up a load. Load shifting causes the load to become unbalanced and may result in damage to objects or people.
magnet	An electromagnetic device that has the property of attracting iron and producing a magnetic field external to itself.
magnetic field	A detected force that exists around a magnet or electrical field.
marking	A tag permanently affixed to the sling that states the size, grade, rated capacity, and reach of the sling. A marking is also called a sling identification tag.
mast	The upright member of a derrick. The mast is held at the head with guys and braces.
metal mesh sling	A sling with fabric made of spiral, welded, or brazed wire or chain and cross rods.
natural fiber rope sling	A sling made of conventional three-strand-construction fiber rope. Manila is a common natural fiber material used in slings.
Occupational Safety and Health Administration	The United States government agency that regulates the conditions in working environments to ensure the health and safety of employees. The Occupational Safety & Health Administration is abbreviated as OSHA.
operating temperature	The service temperature at which a lifting device can be safely used. Lifting devices, such as slings, can withstand only certain temperatures before they incur damage.
operation type	The type of power provided to the lifting device. Lifting devices are powered electrically, manually, or by air pressure.
operational test	A test required by OSHA and performed prior to the initial use of a lifting device. The operational test ensures the main components and functions are safe and in compliance with OSHA standards.
overhead crane	A crane with a movable bridge carrying a movable or fixed hoisting mechanism and traveling on an overhead fixed runway structure.
overhead hoist	A hoisting mechanism used with an overhead lifting device, such as a crane.
periodic inspection	Inspections that occur at monthly intervals depending on the degree of exposure to wear and deterioration and malfunction of critical components.
portable cantilever hoist	A lifting device with a hoisting mechanism and a beam that extends beyond the runway structure. A portable cantilever hoist can be manually moved to the load for lifting.
portable crane hoist	A lifting device with a hoisting mechanism that can be manually moved to the load for lifting.
portable lifting stand	A portable lifting device used for lifting in confined areas.
preventive maintenance	A program required by OSHA and based on the manufacturer's recommendations for adjustment and repair of the lifting device and components.
proof test	A nondestructive tension test performed by the sling manufacturer or an equivalent entity to verify construction and workmanship of a sling.
rated load test	A test required by OSHA and performed prior to the initial use of a lifting device to test the load rating determined by the manufacturer.
rivet	A type of non-threaded fastener that consists of a shank and a head made of deformable material. Rivets are inserted through holes and are hammered into a matching head on the other side of the part.
rope reeving	A system in which the rope travels around drums and sheaves.
runway structure	An assembly of rails, beams, girders, brackets, and framework on which a crane or trolley travels.
semigantry crane	A gantry crane with one end of the bridge supported by one or more legs that run on a fixed rail or runway. The other end of the bridge is supported by a truck running on an elevated rail or runway.
sheave	A grooved wheel or pulley.
shoulder eyebolt	An eyebolt used for increased strength when side forces impact the load during lifting.
sling	A loop of material, which connects the load to the lifting device. Slings can be made of chain, wire, metal mesh, natural, and synthetic materials.
sling identification tag	A tag permanently affixed to the sling that states the size, grade, rated capacity, and reach of the sling. A sling identification tag is also called a marking.
spreader bar	A device used to distribute weight while lifting wide frames.
standard eyebolt	An eyebolt used only for vertical lifting.
steel chain	Chains, usually made from alloy steel, that are used for general-purpose lifting because of their strength and durability.
storage bridge crane	A gantry crane in which the bridge girders or trusses are supported on one or more legs. The storage bridge crane may have one or more fixed or hinged cantilever ends. Storage bridge cranes are usually used for bulk storage of material.
suspension type	The mounting or method used to suspend the hoist. Common suspension types include hook mounted, lug mounted, trolley mounted, and wall mounted.
synthetic fiber rope sling	A sling made of conventional three strand construction synthetic materials such as nylon, polyester, and polypropylene.
synthetic web sling	A sling made of synthetic materials such as nylon, polyester, and polypropylene. Web slings come with different fabric constructions such as triangle, eye and eye, endless, and return eye.
thread	A raised, helical rib or ridge around the interior or exterior of a cylindrically shaped object. Threads are found on screws, nuts, and bolts and are used to fit parts or provide motion.
three-strand construction	Three strands of fiber or synthetic rope that are right-laid and hand-twisted together for increased strength.
tier-tote chain	A chain used for lifting that attaches to two sides of a basket or object.
trolley	The unit which travels on the bridge rails of a crane and carries the hoisting mechanism.
trolley travel	The movement of the trolley on a crane. The trolley moves at right angles to the crane runway.
wall crane	A crane with a jib and with or without a trolley. The wall crane is supported from a side wall or columns of a building.
wire rope sling	A sling composed of wire rope that is either, braided, bridled, cable laid, or strand laid.

What is the definition of J-hook?

A hook in the shape of the letter "J." J-hooks are designed for use with chains, hoists, and slings.Learn more about J-hook in the class "Safety for Lifting Devices 135" below.

Safety for Lifting Devices 135

Safety Department

A hook in the shape of the letter "J." J-hooks are designed for use with chains, hoists, and slings.

Learn more about J-hook in the class "Safety for Lifting Devices 135" below.