Guidance on the application of statistical methods for determining the properties of masonry products

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-31-2017

Publisher

British Standards Institution

In the masonry unit standards and in national legislation, some properties need to be declared based on a certain fractile and confidence level. To demonstrate compliance with that a statistical tool can be used. The purpose of this Technical Report is to exemplify how a statistical tool can be used in practice. This document should not contradict nor extend the scope of the work and role of a Notified Body, nor impose additional burdens on the manufacturer, beyond those laid down in the Construction Products Regulation and the product standards. Mechanical and other properties of building materials and components are in the report described by random variables with a certain type of probability distribution. The popular normal distribution (Laplace-Gauss distribution) is given in Annex A. Normal distribution may be used to approximate many actual symmetrical distributions. When a remarkable asymmetry is observed, then another type of distribution reflecting this asymmetry should be considered, leading to a more complex method to demonstrate compliance with the product standard. More information on the normality test of Shapiro-Wilk is given in Annex D.

Committee	B/519
DocumentType	Standard
Pages	0
PublisherName	British Standards Institution
Status	Current

Standards	Relationship
CEN/TR 16886 : 2016	Identical

EN 771-3:2011+A1:2015	Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)
EN 998-2:2016	Specification for mortar for masonry - Part 2: Masonry mortar
EN 771-4:2011+A1:2015	Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units
ISO 12491:1997	Statistical methods for quality control of building materials and components
EN 845-2:2013+A1:2016	SPECIFICATION FOR ANCILLARY COMPONENTS FOR MASONRY - PART 2: LINTELS
ISO 2394:2015	General principles on reliability for structures
EN 771-6:2011+A1:2015	Specification for masonry units - Part 6: Natural stone masonry units
ISO 16269-6:2014	Statistical interpretation of data Part 6: Determination of statistical tolerance intervals
EN 845-1:2013+A1:2016	Specification for ancillary components for masonry - Part 1: Wall ties, tension straps, hangers and brackets
EN 771-1:2011+A1:2015	Specification for masonry units - Part 1: Clay masonry units
EN 1990:2002/A1:2005/AC:2010	EUROCODE - BASIS OF STRUCTURAL DESIGN
EN 771-5:2011+A1:2015	Specification for masonry units - Part 5: Manufactured stone masonry units
EN 771-2:2011+A1:2015	Specification for masonry units - Part 2: Calcium silicate masonry units
EN 845-3:2013+A1:2016	SPECIFICATION FOR ANCILLARY COMPONENTS FOR MASONRY - PART 3: BED JOINT REINFORCEMENT OF STEEL MESHWORK