Shingle
Shingle turns up in 2 fields: geosynthetics, metallurgy. Here is what it means to the people in each one.
Shingle in geosynthetics
To lay overlapping panels with the upslope piece on top, so water sheds over the lap instead of into it.
Installers shingle laps the way roofers do: on slopes and in channels the upslope or upstream panel goes over the one below, so water and soil run across the overlap instead of getting under it. The same idea guides fill placement, which advances in the direction that presses the top layer down instead of peeling it up.
"Shingle the laps downhill on that swale or the first storm will lift every edge."
Shingle in metallurgy
To hammer and squeeze a hot ball of wrought iron to expel liquid slag and consolidate the metal.
Shingling is the mechanical process of taking a spongy, white-hot puddle ball from the puddling furnace and working it under a heavy drop hammer or through a squeezer. The heavy impacts force out the molten silicates and weld the iron particles into a solid, rectangular bloom. This step is essential for producing the fibrous grain structure characteristic of wrought iron.
"Pull that ball out of the furnace and shingle it quickly before the cinder freezes inside the matrix."