A second public inquiry for SR 21: 2014/A1:2015  Guidance on the use of I.S. EN 13242:2002+A1:2004 – Aggregates for unbound and hydraulically bound materials for use in civil engineering work and road construction is in progress until December 8, 2015. You are invited to review the proposed amendment and comment through NSAI’s Your Standards, Your Say process Background An Amendment to S.R. 21:2014 – Guidance on the use of I.S. EN 13242:2002+A1:2004 – Aggregates for unbound and hydraulically bound materials for use in civil engineering work and road construction, (prepared by the NSAI Roads Standards Committee (RSC) Aggregates Panel in conjunction with members of the government's Steering Group on Radon Preventative Measures in new buildings), completed a public inquiry process in July 2015. Second public inquiry required Following public inquiry a process of comments resolution ensued and a second public inquiry was deemed necessary to include further technical revisions to S.R. 21:2014 / A1:201X Your Standards, Your Say: How to comment Click on the following link to access S.R. 21 2014 / A1:201X If this is your first time accessing Your Standards, Your Say you will have to register. You may comment on any clause of this document. Simply enter the clause number, make your comment and your proposed changed text for each clause, subclause, paragraph, table or figure. These revisions to  S.R. 21:2014+A1:201X Annex E - Guidance for specifying aggregates for unbound granular fill (hardcore) for use under concrete floors and footpaths are as follows:

• an optional structural unbound granular fill (hardcore) material for use at depths greater than 900 mm depending on site conditions, settlement potential and other engineering factors;
• clarification of inference of test results/assessments between Annex E materials;
• revision of nomenclature of unbound granular fill( hardcore) materials specified in Annex E;
• relevant editorial revisions as a result of technical revisions.