needling

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needling

[′nēd·əl·iŋ]
(civil engineering)
Underpinning the upper part of a building with horizontally placed timber or steel beams.
(mining engineering)
Cutting holes or ledges in a coal bed or rock surface for receiving the ends of timber supports.

needling

1. Attaching a base coat of thatch onto the battens of a thatched roof; by sewing them together with a large, flat metal needle.
2. A needle beam which provides temporary support of a load.