duckboard

Short definition from Wiktionary

Noun

1. 1
   One of a long series of boards laid from side to side as a path across wet or muddy ground; normally used in plural.
2. 2
   Wooden, low walkway or short part of a path with one or more planks, logs, or boards laid after each other lengthwise, often two planks wide.
3. 3
   A panel of wooden slats typically laid on a concrete floor in a workshop, to reduce fatigue for a person operating a machine tool or working at a bench.