Extra over (EO)
‘Extra over’ (EO) is a term that is often used when taking off for a bill of quantities (BoQ). Taking off is the process of identifying elements of construction works that can be measured and priced.
When taking off for a BoQ, the term ‘extra over’ can be used to refer to items that to a certain extent have already been measured, but have not been priced at the full value of all their labour and materials. A common example of this is when measuring drain pipes, for which the estimator may determine a cost based on the full length of the pipe measured along its centre-line, and then assess an ‘extra over’ cost for the additional cost necessary to pay for fittings such as bends and junctions. So the cost of a section of pipe with a bend is the cost of the length of the pipe plus the extra over cost for the bend.
EO items should be listed directly beneath the main item over which they are measured, as this simplifies the the interpretation of the BoQ by suppliers. If the EO item cannot be listed immediately beneath, reference should be given in its description in the main item it relates to.
[edit] Related articles on Designing Buildings Wiki
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Construction Management, 8 July
NEETs crisis drives interest in trades, but apprenticeships barriers remain.
Passive fire protection webinar
MEP services penetration seals.
Where its at podcast (and video) - The role of the Architectural Technologist as an Expert Witness.
More than 200 remarkable buildings added to SAVE’s Buildings at Risk register.
Government scraps pre-application consultation for Nationally Significant Infrastructure Projects.
Historic England and infrastructure
New projects offer opportunities for the historic environment and local communities.
Construction Management, 2 July
Construction deaths halve in two years.
Green Book changes to drive investment in all parts of UK.
Minimum energy efficiency standards (MEES)
CIAT briefing on response to consultations for privately rented non-domestic properties.
Connect, collaborate, shape the future
Registration now live for UK Construction Week Birmingham.
CIOB announces Saul Humphrey FCIOB as new President for 26/27 term.
A quick, simple, and zero-bills solution to prevent overheating.
Comments
good explanation