P

Symbol used to indicate Grade 40 chain.

PARBUCKLING

A method of moving a large cylinder up or down a ramp using one or more ropes to haul it or control its descent.

PARCELLING

Covering a splice with strips of duck or canvas before serving.

PARACHUTE HARNESS

See ‘safety harness’.

PARTS OF ROPE

See ‘falls’.

PENDANT

A rope used to provide support to a length of crane boom or jib.

PENDANT CONTROL

A hand held set of motion controls attached to a crane or hoist by an extension cable to provide remote operation. Particularly used with some types of bridge cranes and power perated chain blocks.

PERSONNEL AND MATERIALS HOIST

A powered builder’s hoist which hoists personnel, goods or materials.

PIGSTY

A method of placing bearers on top of each other at right angles to provide a stable temporary support for a load.

PIN-JIB CRANE

See ‘lattice boom crane’

See ‘calibrated chain’.

PLATE CLAMP

A purpose designed appliance for lifting steel plate and similar items.

PLATE SHACKLE

A shackle with two side plates used to connect boom pendants.

PODGER SPANNER

A spanner with a tapered handle used to field bolt structural steel members.

POWER TAKE-OFF WINCH

A winch powered by the engine of the vehicle to which it is attached.

PORTAL BOOM CRANE

A powered jib or boom crane mounted on a portal frame that is supported  on runways allowing the crane to travel. Commonly used in waterside ports.

PREFORMED ROPE

FSWR where the spiral of the strands and wires is formed before the rope is laid up.

PROOF-COIL CHAIN

Unmarked chain of uncertain grade and construction.

PROTECTIVE DEVICE

A device used with a suspended scaffold which will arrest the descent and support a cradle or boatswain’s chair in the event of a failure of a suspension rope or scaffolding hoist.

PURCHASE

A series of sheaves reeved up to form a mechanical advantage in the FSWR.

PURLIN

A longitudinal member spanning between roof trusses or beams to which roofing sheets are fixed.