Mandatory Building Inspection Scheme (MBIS) and Mandatory ...

1 11 Mandatory Building Inspection SchemeMandatory Building Inspection Scheme (MBIS)(MBIS)andandMandatory Window Inspection SchemeMandatory Window Inspection Scheme (MWIS)(MWIS)22 ContentContent PurposePurpose LegislationLegislation Key Features of MBIS & MWISKey Features of MBIS & MWIS Duties of Registered InspectorDuties of Registered Inspector Code of Practice for MBIS and MWISCode of Practice for MBIS and MWIS Implementation TimetableImplementation Timetable33 PurposePurpose"Prevention is better than cure""Prevention is better than cure"If owners can regularly inspect their buildings, identify problems at an early stage and carry out remedial works timely, accidents can be Buildings (Amendment) Ordinance 2011 [B(A)O 2011] introducing MBIS & MWIS Building ( Inspection and Repair) Regulation [B(I&R)R] setting the scopes, standards and procedural requirements for carrying out prescribed Building /window inspections and repair Building (Administration)(Amendment) Regulation 2011 establishing a new inspectors register under the BO & stipulating the qualification and experience requirements for RI 55 MBIS applies to private buildings* aged 30 years or above owners are required to appoint registered inspector (RI) to carry out prescribed Building Inspection and supervise prescribed repair in every 10 yearsMWIS applies to private buildings* aged 10 years or above owners are required to appoint qualified person (QP)

2 To carry out prescribed window Inspection and supervise prescribed repair in every 5 yearsKey Features of MBIS and MWISKey Features of MBIS and MWIS* except domestic Building not exceeding 3 storeys in heightB(A)O 2011B(A)O 201166 Annual Target 2,000 MBIS buildings 5,800 MWIS buildings (of which 2,000 are synchronized with MBIS buildings) Target buildings to be selected at quarterly intervalsKey Features of MBIS and MWISKey Features of MBIS and MWISS election of target buildingsSelection of target buildings77 Registered Inspector (RI)Registered Inspector (RI) A A person whose name is in the person whose name is in the inspectorsinspectors register register under the BO. under the BO. They include:They include: Authorized PersonsAuthorized Persons Registered Structural EngineersRegistered Structural Engineers Registered ArchitectsRegistered Architects Registered Professional EngineersRegistered Professional Engineers( Building , Building Services ( Building ), Civil, Materials (Buil( Building , Building Services ( Building ), Civil, Materials ( Building ) & ding) & Structural) Structural) Registered Professional SurveyorsRegistered Professional Surveyors( Building Surveying & Quantity Surveying)( Building Surveying & Quantity Surveying)Key Features of MBIS and MWISKey Features of MBIS and MWIS88 Qualified Person (QP)Qualified Person (QP) A person whose name is in one of the registers under the BO.

3 They include: Authorized Persons Register Structural Engineers Register Inspectors Register General Building Contractors Register Minor Works Contractors Register (registered for the class, type and item of minor works in respect of windows) Key Features of MBIS and MWISKey Features of MBIS and MWIS9 Prescribed Inspection under MBIS & MWIS covers the following elements of a Building : Common parts External walls Projections Signboards Windows9 Scope of Prescribed InspectionKey Features of MBIS and MWISKey Features of MBIS and MWISB(A)O 2011B(A)O 20111234510 Pre-notification letter 6 months advance notice to all owners of the Building before MBIS NoticesMBIS Notices 3 months* for appointment of RI 3 months for completion of Building Inspection 6 months for completion of Building repair* extra 3 months will be given for Building without OCTime Frame of MBIS NoticesTime Frame of MBIS Notices11 Pre-notification letter 1 month advance notice to OC or Management Office or post on conspicuous part of the Building prior to MWIS NoticeMWIS Notices 3 months* for appointment of QP 2 months for completion of window Inspection 1 month for completion of window repair* an extra 3 months will be given for Building without OCTime Frame of MWIS NoticesTime Frame of MWIS Notices1212 Duties of Registered Inspector (RI)Duties of Registered Inspector (RI)

4 Carry out the prescribed Inspection personally and provide proper supervision of the carrying out of the prescribed repair Comply with the BO Notify BA of any case of emergency during the prescribed Inspection and prescribed repair Record any unauthorized Building works in the common parts and exterior of the building1313 Specifies the technical standards and procedural requirementsfor the RI and QP to carry out prescribed Inspection and to supervise the necessary prescribed repair of buildings and windows Provides guidance to comply with the requirements of BO and B(I&R)R The CoP mainly covers: Inspection and Assessment Detailed Investigation Rectification and Repair Supervision and ControlCode of Practice for MBIS and MWISCode of Practice for MBIS and MWISD raft version of CoPuploaded in BD website in August 20111414 Scope of Inspection Inspection shall cover the following Building elements.

5 -Under MBIS- External elements and other physical elements- Structural elements- Fire safety elements- Drainage systemUnder MWIS-Windows Code of Practice for MBIS and MWISCode of Practice for MBIS and MWIS1515 Scope of InspectionScope of Inspection External elements and other physical elements Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISE xternalElementsandOtherPhysical Elements- External finishes such as tiling, rendering and cladding- Fins, grilles, and metal louvers- Protective barriers, railings, parapets and balustrades- Fencing and associated fixings- Curtain wall- Appendages- Manually or electrically operated metal gates1616 Scope of InspectionScope of Inspection Structural elementsCode of Practice for MBIS and MWISCode of Practice for MBIS and MWIS- Columns, walls, beams, slabs, staircases, Cantilevered projecting structures- Transfer structures- Hanging structures- Other structural elements exposed in the building1717 Scope of InspectionScope of Inspection Fire safety elements Code of Practice for MBIS and MWISCode of Practice for MBIS and MWIS-Means of escape-Means of access for fire fighting and rescue-Fire resisting construction1818 Scope of InspectionScope of Inspection Drainage system Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISD rainagesystem- at external walls of Building - in common parts- within common pipe ductsUnderground and above-ground common drainage systemAny other common drainage system for the Building under Inspection that may, if defective, choked or misconnected.

6 Affect the sanitary or hygienic condition of the building1919 Inspection and AssessmentInspection and Assessment Step 1: Pre- Inspection preparation- Retrieve all relevant approved/accepted plans, details and documents to gain a clear understanding of the overall Building design and construction including subsequent A&A Review all available information to determine the design standards and CoPs that were in force when Building was constructed and A&A works that had been carried Formulate an appropriate method statement for the Inspection of the of Practice for MBIS and MWISCode of Practice for MBIS and MWIS2020 Inspection and AssessmentInspection and Assessment Step 2: Carrying out of Inspection by - Visual Inspection - Hammer-tapping- Infrared thermography- Cover meter survey- Crack width measurement- Opening up of concrete cover at root of cantilevered slab canopy- Closed circuit television survey (CCTV)Code of Practice for MBIS and MWISCode of Practice for MBIS and MWIS2121 Inspection and AssessmentInspection and Assessment Step 3: Assessment and follow up action - Assess the conditions of elements inspected.

7 - Make recommendations on the follow-up action based on the Inspection findings and professional Provide proposals for the rectification and repair works in the Inspection Report submitted to the of Practice for MBIS and MWISCode of Practice for MBIS and MWIS2222 Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISD etailed Investigation (DI)Detailed Investigation (DI)RI shall considerconducting an DI defects,abnormal deteriorationconstituting structuralinstability or serioushealth hazardExtent or causeof defect cannot beascertained duringinspectionSeriousstructuraldefects Serious corrosionof main bar at theroot of CSC afteropening up inspectionUncertainty in Fire Resistance Ratingof Fire ResistingConstructionMisconnectionof drain pipesTo detect defectiveundergrounddrains/pipes,source of leakage, etc2323 Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISD etailed Investigation (DI)Detailed Investigation (DI) Investigation methods For condition of concrete:- may be assessed by hammer-tapping, carbonation test, test on chloride and cement content, coring and rebound hammer test, crack survey or other feasible means For condition of reinforcement.

8 - may be assessed by covermeter survey, measurement of section loss, electrochemical (half-call) potential measurement or other feasible means2424 Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISD etailed Investigation (DI)Detailed Investigation (DI) Investigation methods For structural assessment:- Based on the DI results, evaluate safety level of the structural elements by determining its Factor of Structural Performance (FSP) For drainage elements:- Dye test, CCTV survey, smoke or water test, or other feasible means2525 Rectification and Repair (MBIS)Rectification and Repair (MBIS)Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISG eneral principles- Based on the Inspection findings, the RI shall adopt the most appropriate repair Carry out appropriate proof tests to ensure the standard and quality of the repair The RI shall ensure that the repair works are carried out to meet the standards stipulated in the BO and B(I&R) and Repair (MBIS)Rectification and Repair (MBIS)

9 Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISWhen formulating arepair proposal, theRI shall considerthe following factorsIntended use anddesign life of structureSeverity of exposure,condition of existingstructure, cause of defectImpact of repair proposalto the occupants andpublic, access to repairEffects of repair workson Building andenvironmentRequired performanceof repair works, durabilityCompatibility of repair materialswith the substrate and theparent structureOther aspects relevant to thesafety and health standardsof Building under repair2727 Inspection and Repair under MWISS cope of Inspection :-General Requirement and Standard of Repair:-- All windows shall remain safe until next cycle of Inspection in 5 years- All defective window components shall be replaced- The renewed components shall be of such material or size not inferior to that of the original design- Windows of specified fire resistance rating shall be maintained after rectificationCode of Practice for MBIS and MWISCode of Practice for MBIS and MWISR ivets, screws, hinges,sliding tracks, shoesand window staysGlass panes,sealant and putty,window framesOther elements that QPconsiders may affectsafety of windowunder inspection2828 Supervision and Control during Repair.

10 Code of Practice for MBIS and MWISCode of Practice for MBIS and MWISA dequate measures to ensurea safe working environmentAdequate control on the sequence ofrectification and repair works, theerection and maintenance of scaffoldsAdequate measures to ensure therectification and repair works arecarried out in accordance with theinspection findings & recommendationsof RI/QPSupervisionandcontrolduringrepair29 29 Thank youThank you