The following terms define Building and Machine Parts
- P -
panel: flat piece of wood fitted into larger surface
area.
part: component, one element of which something is made.
partition: interior wall.
peg: short, usually tapered rod used to hold parts together
or fill opening.
pier: vertical masonry column, usually concrete, that
supports beam or load from above
pilaster: rectangular
support or pier projecting from wall.
pile: concrete, steel, or wood column that supports
building foundation.
piloti column of iron, steel, or reinforced concrete
that supports structure above open ground level.
pin: peg, post, or rod used to fasten objects.
pinion: small cogwheel, with teeth, that fits into large
gearwheel or rack.
pintle: usually upright pivot pin on which another part
turns.
pipe: metal or plastic tubing used in plumbing and heating
works.
plancier: underside of eave or cornice; soffit.
plank: long, flat, wood member 2-4 inches (5.1-10.2
cm) thick and 6 inches (15.2 cm) or more wide.
plate: horizontal structural member, usually wood.
platen: flat plate in printing press, or roller in typewriter,
on which paper rides.
platform: horizontal floor area, especially midway up
stairs.
plenum: box on furnace from which ducts run to outlets.
pole: shaft, narrow column.
post: vertical structural member, especially timber
set on end to support beam.
projection: part that juts out from surface.
purlin: horizontal root support between rafters.
pylon slender, towering structure flanking entrance
or supporting wires.
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