W

Symbol used to indicate a warrington construction in an FSWR.

WLL

Working load limit.

WALKING

Mobiling a load with track mounted cranes.

WARPING DRUM

A powered winch with a dished drum used with a fibre or wire rope which is turned around the drum using friction to lift or haul a load. Also called a ‘capstan winch’.

WARRINGTON

A multi-layered strand construction method for FSWR where the strand is laid up parallel with alternate large and small wires in one layer.

WEBBING SLING

A flat woven synthetic fibre sling.

WHIP UPON WHIP

A fibre rope tackle with two moveable single blocks and one fixed single block.

WHIPPING

A method of preventing the end of a rope from unlaying by securing yarn, marline, twin or wire around it. Forms of whipping used with fibre ropes include Common whipping, American whipping, West-Countryman’s whipping and Palm-and-Needle whipping.

WINCH

An appliance which provides a means of hoisting or hauling a load.

WIRE

A single continuous steel filament. In FSWR, a number a wires make up a strand, and several strands form a rope.

WIRE ROPE GRIP

A removable device incorporating nuts and bolts designed to be fixed to FSWR.

WORK CAGE

A suspended scaffold cradle supported by a single suspension rope. Usually designed for one person.

WORK BOX

A crane lifted box designed to carry personnel and provide them with a working platform. Often used to service tower crane booms and during large-scale steel erection.

WORKING LOAD LIMIT

The maximum load which can be applied under general conditions of use to a crane, hoist, rope, chain, sling or item of lifting gear.

WORMING

The laying of lengths of spun yarn into the valleys between the strands of a rope to make the rope completely circular before it is served.