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Glossary group: O

Outrigger

  • March 5, 2021
  • camuser

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.

Oriented Strand Board or OSB

  • March 5, 2021
  • camuser

A manufactured 4′ X 8′ wood panel made out of 1″- 2″ wood chips and glue. Often used as a substitute for plywood.

Open hole inspection

  • March 5, 2021
  • camuser

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.

Oakum

  • March 5, 2021
  • camuser

Loose hemp or jute fiber that’s impregnated with tar or pitch and used to caulk large seams or for packing plumbing pipe joints

O C- On Center

  • March 5, 2021
  • camuser

The measurement of spacing for studs, rafters, and joists in a building from the center of one member to the center of the next.

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