BS

British Standard followed by a number which denotes a particular publication.

BACK HOOKING

A method of slinging using slings with hooks where the sling is passed around the load and the hook is secured back onto the ring or hook above the load.

BACK SPLICE

A splice in the end of a fibre rope to prevent it from unlaying.

BALD EYE

An eye in a rope which is not protected by a thimble. It is also called a ‘soft eye’

BARROW HOIST

See cantilever platform materials hoist.

BASKET HITCH

A method of securing a sling around an object by bringing both eyes back together with an angle factor = 1.

BAYONET

A jib extension used with the auxiliary winch on a hydraulic boom crane and often extending from a fly jib to increase the crane’s operating radius and drift

BEARING JOINT

A bolted joint in steel erection designed to allow for some joint slip for alignment.

BECKET

An anchorage point on a sheave block when reeving a tackle or purchase.

BECKET LOAD

The load in any fall of rope in a multiple fall tackle or purchase. It equals the total load being lifted divided by the number of falls supporting the load.

BEND

A tie made in fibre rope to create a temporary eye (such as a bowline bend) or to join ropes (such as a sheet bend).

BIGHT

The middle portion of a length of rope. For example, a ‘bowline on the bight’ means a bowline formed in the middle of a rope.

BILL

The lower end point of a hook.

BIRDCAGING

A rope defect, springing or enlargement of a FSWR – usually in Lang’s Lay.

BLACK WIRE

See bright wire.

BLOCK

An appliance which supports one or more sheaves.

BLOCK AND TACKLE

A sheave block or blocks used with fibre rope.

BOATSWAIN’S CHAIR

A suspended scaffold where the platform is a chair or similar device suitable for use by one person.

BODY BELT

A safety belt designed to be worn around the waist and which does not have shoulder straps or leg straps.

BOOM

A member attached to and cantilevered from the crane structure from which the load is suspended. Can be luffed or sleeved while the crane is handling a load.

BOOM BUTT

The end of the boom nearest to the crane.

BOOM HEAD

The end of the boom furthest from the crane.

BOOM LIFT

See boom type elevating work platform.

BOOM TYPE ELEVATING WORK PLATFORM

A powered telescoping device, hinged device or articulated device or any combination of these used to support a platform on which personnel, equipment and materials may be elevated to perform work. Also known as ‘cherrypickers’.

BORDEAUX CONNECTION

A fitting used to connect a chain to FSWR where the connection is required to pass over a sheave.

BOTTLE SCREW

See rigging screw.

BOW SHACKLE:

A shackle with bowed sides.

BOWSING

See frapping.

BOWSTRING

A rope tensioned to a structural member to prevent it from distorting during lifting.

BREAKING FORCE

See guaranteed breaking strain (GBS).

BRIDGE CRANE

A powered crane consisting of one or more bridge beams mounted at each end to an end carriage that can travel along elevated runways. It may be cabin controlled or remote controlled (such as pendant control).

BRIGHT WIRE

Uncoated steel wire used in the construction of FSWR. Also known as ‘black wire’.

BRITISH DOCKS SPLICE

Orthodox 5 tuck eye splice in FSWR.

BUSH ROLLER CHAIN

Chain constructed with parallel flat links and cylindrical rollers, such as bicycle and motorcycle drive chains.

BUILDER’S HOIST

A hoist incorporating a mast or guides which is used on building and construction projects. It includes a cantilever platform materials hoist and a personnel and materials hoist.

BULLDOG GRIP

A wire rope grip consisting of a U-bolt, two nuts and a saddle.