Last edited 11 Oct 2018

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

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

O/A - On or About

OA - On or About

OAPF - opportunity area planning framework

OBC - Outline Business Case

Obs - Obsolete/Obsolescent

OBST - Operational Business Systems Team

OC - On Centre

OC - Open Crossing

OCDEA - On Construction Domestic Energy Assessor

OCR - Opportunity Cost Rent

OCT - Overseas Countries and Territories

OD - Ordnance Datum

OD - Outside Diameter

ODA - Olympic Delivery Authority

ODP - Ozone Depletion Potential

ODS - Ozone Delpleting Substances.

OECD - Organisation for Economic Cooperation and Development

OEL - Occupational Exposure Limit

OELS - Organic Entry Level Stewardship

OES - Occupational Exposure Standard

OF - Overflow

OFGEM - Office of Gas and Electricity Markets

OFL - Over-Flow alarm

OFS - Oil Fired Appliance Standard

OFWAT - Office of Water Services

OfWAT - The Water Services Regulation Authority

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

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

OIL - Open Items List

OIL - Outstanding Items List

OIOO - One In One Out

OIR - Oganisational Information Requirements

OITO - One In Two Out

OJEU - Official Journal of the European Union

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

ONS - Office for National Statistics

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

ORC - Organic Rankine Cycle

ORR - Office of Rail Regulation

OS - Ordnance Survey

OSB - Oriented Strand Board

OSC - Operational Safety Case

OSD - Over Site Development

OSI - Open Systems Interconnection (model)

OSL - Overhead Slab Level

OSRPA - Offices Shops and Railway Premises Act

OV - Oven

OZ - Outer Zone