T

Symbol indicating Grade 80 chain.

t

Symbol for tonne.

TFB

Tapered flange beam.

TACKLE

Fibre rope reeved through sheaves to form a mechanical advantage.

TAGLINE

A fibre rope attached to a suspended load to control the load during lifting.

TAPERED FLANGE BEAM

A largely obsolete type of steel I-beam. UB’s are now generally used.

TARE WEIGHT

The unloaded weight of a crane, lifting box or other container. It is also called then ‘self-weight’.

TELESCOPING

The extension or retraction of a crane’s boom or jib by the movement of the boom or jib sections during normal operation. A feature of most hydraulic boom cranes.

THIMBLE

A grooved piece of metal, circular or pear-shaped, used to protect an eye splice. It forms a ‘hard eye’.

TONNE

A unit for measuring mass (or weight). 1000kg equals 1 tonne.

TOWER CRANE

A boom or jib crane mounted on a tower structure.

TRACK-MOUNTED CRANE

A mobile crane mounted on a crawler track base. It is not usually fitted with outriggers.

TRAVEL

Movement of a complete crane along a surface or track.

TRAVEL TOWER

A boom-type EWP mounted on a truck tray.

TRAVERSE

Movement of a crab or other part of a crane along runways forming part of the crane structure, or horizontal movement of a scaffold platform hung from or suspended from a trolley track.

TRAVERSING ROPE

A fibre rope used with a suspended scaffold or hung scaffold supported from a trolley track to provide controlled horizontal movement of the platform. Also the rope used to traverse the fox across the main cable of a flying fox.

TRESTLE LADDER

A portable hinged self-supporting ladder designed and intended to support scaffold planks.

TRUCK-MOUNTED CRANE

A mobile crane mounted on a truck-type chassis and cab system, with the crane base forming part of the truck chassis.

TUCK

A rope strand tail passed under a strand in the construction of a splice.

TURNBUCKLE

An open framed attachment with an anchorage and threaded rod at each end used to tension a rope or to provide fine adjustment.