Construction industry acronyms - O

This article presents a list of construction industry acronyms beginning with 'O'.

For other letters click on the list below:

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

[edit] O

02 - Oxygen

O&M - Operations and Maintenance (See Building Owner's Manual)

O/A - On or About

OA - On or About

OA - Optimised Alternative

OAD - Outside Access Device

OAPF - Opportunity Area Planning Framework

OBC - Outline Business Case

OBR - Office For Budget Responsibility

Obs - Obsolete/Obsolescent

OBS - Organisation Breakdown Structure

OBS - Office for Building Safety (Northern Ireland)

OBST - Operational Business Systems Team

OC - On Centre

OC - Open Crossing

OCDEA - On Construction Domestic Energy Assessor

OCF - Open Connectivity Foundation

OCIP - Owner-controlled insurance programme

OCR - Opportunity Cost Rent

OCS - Overhead Catenary System

OCT - Overseas Countries and Territories

OD - Ordnance Datum

OD - Original Datum

OD - Outside Diameter

ODA - Olympic Delivery Authority

ODM - Original Design Manufacturer

ODP - Ozone Depletion Potential

ODS - Ozone Delpleting Substances.

ODYM - Open Dynamic Material Systems Model

OECD - Organisation for Economic Cooperation and Development

OEE - Overall Equipment Effectiveness

OEL - Occupational Exposure Limit

OELS - Organic Entry Level Stewardship

OEM - Original Equipment Manufacturer

OES - Occupational Exposure Standard

OES - Optical Emission Spectrometry

OF - Overflow

OFGEM - Office of Gas and Electricity Markets

OFL - Over-Flow alarm

OFS - Oil Fired Appliance Standard

Ofsted - Office For Standards In Education

OFWAT - Office of Water Services

OfWAT - The Water Services Regulation Authority

OGA - Oil & Gas Authority

OGC - Office of Government Commerce (no longer in existence)

OGC - Open Geospatial Consortium

OGD - Other Government Departments

OGSF - Overall Gross Square Footage

OH - Occupational Health

OH - Over Head

OH&P - Overhead and Profit

OHAC - Occupational Health Advisory Committee

OHP - Overhead Projector

OIC - Open Connectivity Foundation

OIL - Open Items List

OIL - Outstanding Items List

ONR - Office for Nuclear Regulation

OIOO - One In One Out

OIR - Oganisational Information Requirements

OITO - One In Two Out

OJEU - Official Journal of the European Union

OLA - Occupiers' Liability Act

OLB - Timber Origin and Legality (Origine et Légalité des Bois)

OLC - Open Level Crossing

OLE - Object Linking and Embedding

OLE - Overhead Line Equipment

OM - Operating & Maintenance (Manual)

OM - Operations Manager

OM - Organic Matter

OML - Ordinary Maternity Leave

OMM / O&MM Operation & Maintenance Manual

ONR - Office For Nuclear Regulation

ONS - Office For National Statistics

OP - Orifice Plate

OPA - Output and Performance Analysis

OPAS - Operational Property Asset System

OPC – Ordinary Portland Cement

OPEX - Operational Expenditure

OPIP - Operational Process Improvement Project

OPM - Output and Performance Measures

OPO - One Person Operated

OPPI - Owners' Protective Professional Insurance

OPR - Owner's Project Requirements

OPSS - Office for Product Safety and Standards

ORC - Organic Rankine Cycle

ORR - Office of Rail and Road (was Office of Rail Regulation)

ORR - Office Of Rail Regulation

OS - Ordnance Survey

OSAT - On-Site Assessment and Training

OSB - Oriented Strand Board

OSC - Offsite Construction

OSC - Operational Safety Case

OSD - Over Site Development

OSF - On-the-job, social, formal

OSHA - Occupational Safety and Health Administration

OSI - Open Systems Interconnection (model)

OSL - Overhead Slab Level

OSRPA - Offices Shops and Railway Premises Act

OSS - Open Spaces Society

OTA - Owner Tenant Agreement

OTL - Object Type Library

OTS - Office of Tax Simplification

OV - Oven

OWIC - The Offshore Wind Industry Council

OWMIS - Offshore Wind Manufacturing Investment Scheme

OZ - Outer Zone