M

The symbol used to indicate the diameter of a structural bolt in millimeters. For example, M16 indicates a 16mm bolt.

m

A meter – the unit for measuring distance.

mm

Millimeters. 1000mm equal one meter.

MPa

Megapascal.

MSDS

Material safety data sheet.

MAN AND MATERIALS HOIST

See personnel and materials hoist.

MANILA

Natural fibre used for rope construction. Has a creamy brown appearance when new.

MARLIN SPIKE

A tapered hand tool used to prise open the strands of an FSWR during splicing or during rope inspection.

MARLINE

Tarred hemp cordage used for MAST CLIMBER: A hoist with a working platform used for temporary purposes to raise personnel and materials to the working position. It has a drive system mounted on an extendable mast which may be tied to a building.

MATERIALS HOIST

A builder’s hoist used for raising and lowering materials (not personnel) including a cantilevered platform materials hoist.

MATERIAL SAFETY DATA SHEET

Manufacturer’s or supplier’s information about a substance, including any hazards associated with its transportation, storage and use.

MECHANICAL LOADSHIFTING EQUIPMENT

When used in connection with rigging, this term includes specified cranes, hoists, cableways, flying foxes, winches, blocks and purchases which incorporate sheaves, jacks and airbags.

MEDIUM DUTY WORKING PLATFORM

A platform on a scaffold with a duty live load capacity of 450kg per bay. This is twice the capacity of a light duty platform.

MEGAPASCAL

A unit for measuring pressure or stress. 1000 kilopascals equals 1 megapascal. 1 megapascal is approximately equal to 100 tonnes per square meter.

MOBILE CRANE

A crane which can travel over a supporting surface without the need for fixed runways or railway tracks and which relies on gravity for stability.

MOBILE SCAFFOLD

An independent free standing scaffold mounted on castors.

MOBILING

Moving a mobile crane over its supporting surface while it is under load.

MULTI-LEGGED SLING

A sling assembly with more than two sling legs.

MULTIPLE CRANE LIFT

The movement of a load where the load is suspended from two or more cranes.