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Lagging
Heavy planting made to construct walls in excavations and braced cuts.

Lattice Girder
A lightweight curved steel structure installed at the exposed face used to ensure the correct tunnel profile is achieved and also to carry any canopy support (canopy tubes or spiles).

Legging
Timber planes or steel plates inserted above a tunnel – supporting ribs to hold back rods or soil.

Luminaries
A Luminaries is a lighting device that consists of one or more lamps or light sources, a fixture that portions and shields them, components that destitute the light, and elements that connect the lamp to the power supply. In general, Luminaries do not radiate light of equal intensity in all directions because of the diazotisation of the lamps or the geometry of the fixtures.

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