| Ordinance |  In the context of Australian commercial construction projects, an ordinance refers to a local law or regulation that governs the Synonyms - Regulations
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| Open hole inspection | In the context of Australian commercial construction projects, "open hole inspection" refers to the examination and assessment of excavated areas |
| Off Form Concrete | "off-form concrete" refers to concrete that is left exposed after the formwork is removed, without any additional finishing or cladding. |
| OC | An Occupation Certificate is a formal document issued by a certifying authority, such as a local council or a private Synonyms - occupancy certificate
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| Nosing | "nosing" refers to the protruding edge or lip of a stair tread or landing. It is the part of |
| Nominal Size | In Australian commercial construction projects, the term "nominal size" refers to the standard or typical size of a building component, |
| Nogging | Nogging or "noggin" refers to horizontal bracing pieces, typically made of timber or metal, that are installed between vertical studs Synonyms - Noggin
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| Newels | "newels" refer to the vertical posts that support the handrail of a staircase. They are critical components in the |
| Natural finish | A "natural finish" typically refers to a surface treatment or appearance that maintains the inherent characteristics and aesthetics of the |
| Mullion | A "mullion" refers to a vertical or horizontal structural element that divides adjacent window units or panels within a curtain |
| Mortise | A "mortise" refers to a cavity or hole that is cut into a piece of material, typically wood, to receive |
| Mortar Joints | Mortar joints refer to the space between bricks, blocks, or other masonry units that are filled with a mixture of |
| Mortar | Mortar is a paste-like substance primarily used for binding together bricks, stones, or other building units to create structures like |
| Monolithic | The term "monolithic" refers to a building technique that involves creating a structure as a single, continuous unit, typically using |
| Moisture Content | Moisture content refers to the amount of water present in a material, usually expressed as a percentage of the material's |
