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Athens GA Construction Terms Glossary
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O C- On Center- The measurement of spacing for studs, rafters, and
joists in a building from the center of one member to the center of the next.
Oakum- Loose hemp or jute fiber that's impregnated with tar or pitch
and used to caulk large seams or for packing plumbing pipe joints
Open hole inspection- When an engineer (or municipal inspector) inspects
the open excavation and examines the earth to determine the type of foundation
(caisson, footer, wall on ground, etc.) that should be installed in the hole.
Oriented Strand Board or OSB- A manufactured 4' X 8' wood panel made
out of 1"- 2" wood chips and glue. Often used as a substitute for plywood.
Outrigger- An extension of a rafter beyond the wall line. Usually
a smaller member nailed to a larger rafter to form a cornice or roof overhang.
Outside corner- The point at which two walls form an external angle,
one you usually can walk around.
Overhang- Outward projecting eave-soffit area of a roof; the part
of the roof that hangs out or over the outside wall. See also Cornice.
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