Transcript Slide 1
DUTIES OF A CERTIFIER Graham Helme England • No overall responsibility for the entire structure complying with Building Regulations • Often a limited Engineer’s appointment • Designs carried out under the APPOINTMENT have to comply with the Building Regulations • Building Inspectors often decide what they want to see checking • Anyone can submit calculations for approval Scotland • Fewer Local Authority engineers • The Engineer’s design appointment is different to the Certifier’s appointment – it can be for part of the design • The SER Certifier is responsible for EVERYTHING within the scope of the scheme – there is no opting out Methodical And Auditable Approach • Certification Plan – Mirror the audit – Use Audit Rules Appendices A&B as prompts Appropriate Levels of Checking Risk Classification Design Check Level RC1 DCL1 Self check RC2A DCL 2 Simple Check Deign review by individuals not involved in preparing calcs RC2B DCL 3 Intermediate Check More detailed check by individuals not involved in preparing calcs RC 3 DCL 4 Extended Check Detailed Third Party check without reference to original calcs Checking levels correspond to BS EN 1990:2003 Annex B Design Review • Certifier needs to review ALL the relevant designs and details for adequacy. – Not just the Certifier’s own information – Design certificates cannot be relied upon – Are any BBA Certificates appropriate? – Are the designers competent? – Appropriate level of detail on drawings Design Review cont. • Don't forget the WHOLE structure – Protective barriers – Cladding, glazing etc • Existing Buildings – A proportionate assessment must be carried out – Cannot rely on Building Inspector to confirm assumptions – Don’t use Certification Option 4 (Relying upon an identified third party). Certifier needs to make independent assessment of any reports – Make the most of local certifiers Design Review cont. • Fire Protection – Consider it insofar as it affects the structure – Scheme does not extend to full fire engineering (Tech Handbook Section 2.0) • Disproportionate collapse – Applies to ALL buildings Programming • Certification is for what HAS been reviewed not what WILL be reviewed Schedule 1 used to identify later contractor designed items. Requires a performance spec for each item Process is given in Technical Bulletin 2 Rev A: Programming cont. Programming cont. • Staged Warrants with Verifier’s agreement – Allows projects to be broken down into identifiable packages – Eg foundations, structural frame, cladding – Agree stages with Verifier – SER stages need to correspond with Warrant stages – Separate certificate required for each stage which applies ONLY to that stage Programming cont. • Post Certification Design Changes – Any post certification design changes need to be certified. Agree warrant amendments with Verifier – Listing of certified documents when certificate is issued helps protect the Certifier. – Verifiers don’t have a responsibility to check the submitted documents match the certified documents Summary • The certifier’s responsibility is defined by the scheme • The certification process has to be methodical and auditable • Designs and details must be completed before certification • Post certification design changes also need to be certified