INITIAL STRUCTURAL INTEGRITY ASSESSMENT REPORT (SIAR)

Transcription

1 INITIAL STRUCTURAL INTEGRITY ASSESSMENT REPORT (SIAR) Factory Name: 10, HSS Road Chittagong Chittagong Chittagong Bangladesh 21 May 2014 The Alliance for Bangladesh Worker Safety Page 1/12

2 21 May 2014 Introduction to the Report The following report contains a site profile and summary of non-conformities identified during an onsite assessment commissioned by the Alliance for Bangladesh Worker Safety (Alliance) and conducted by a third-party Qualified Assessment Firm (QAF). The assessment was conducted against the Alliance for Bangladesh Worker Safety Assessment Protocols (APs) and Fire Safety and Structural Integrity Standard, which is harmonized with the factory assessment guidelines developed by Bangladesh University of Engineering and Technology (BUET) for the Bangladesh National Tripartite Plan of Action (NTPA). The goal of the Alliance process is to provide clear and practical technical requirements by which Bangladeshi Ready Made Garment (RMG) Factories producing for Alliance members may be consistently and fairly evaluated for fire, structural, and electrical safety in a non-duplicative manner. Each assessment will prompt action plans that will be used by RMG factories to systematically and sustainably improve safety conditions for garment workers. Beyond tracking and reporting on action steps taken in a transparent manner, the Alliance organization and its members will seek to further support factory improvements through technical assistance, training, implementation support for functional Worker Committees, and in some cases financial assistance and wage support for workers if factories are closed for remediation. The contents of the report do not constitute a guarantee of compliance with the applicable laws, the Alliance Standard or the absolute or continued safety against fire, electrical and/or structural integrity issues that may lead to injury or loss of life. The report is designed to provide a non-exhaustive summary of risk issues, based on a limited sampling and duration of time onsite by the named QAF. Neither the QAF nor the Alliance can certify or guarantee the quality, outcome, or effectiveness of actions taken in response to the report. For more information and report feedback please go to: The Alliance for Bangladesh Worker Safety Page 2/12

3 21 May 2014 GENERAL INFORMATION General Information Factory Name: Country: Province: City: Bangladesh Chittagong Chittagong Zip Code: 4200 Audit Duration: Re-Audit: Re-Audit After 0 Months Draft Report Date : Final Report Date : Are all Action Items From Previous Assessment Completed?: Buildings in Complex : Number of Building Levels (Stories) : Approximate Building Area (SF) : Date of Building Construction : Date of Last Building Renovation/Addition : Is the Building mixed use?: Ancillary Structures in Complex : Number of Ancillary Levels (Stories) : N/A There are two (2) structures in the premise. These includes one (1) 6 storied RCC main building and one shed for generator. Main building (G+5) sft. 1st phase (GF to 3rd)- in 1995 and 2nd phase (4th to 5th) to 2001 Addition of tin roofing shed on roof slab in the year of 2001 No Single storied generator building with steel roofing. one story The Alliance for Bangladesh Worker Safety Page 3/12

4 21 May 2014 Approximate Ancillary Structures Area (SF) : 200 sft Number of Occupants : Total number of occupants: 585 Exterior Facade Description : Structural System Description : Exterior facade of the building is of brick wall.the doors are wooden and windows are of glass within steel frame. Structural system is RCC moment resisting frame. Foundation type is strap foundation. This is an irregular structure. The Alliance for Bangladesh Worker Safety Page 4/12

5 21 May 2014 ASSESSMENT FINDINGS Structural System Design Are the available FoS for the columns adequate based on Preliminary calculation? High FoS for the columns noted as below (42 psf live load): Central column: 1.48 Corner column: 2.22 Edge column: 1.78 FoS of central and edge columns exceed the acceptable limits and require additional investigation. Central column FoS Document Review: Document review shows the column sizes & re-bar detail., Visual Assessment, Document Review: Document review shows the column sizes & re-bar detail., Visual Assessment Under guidance from a qualified structural engineer arrange Detail Engineering Assessment of the structure. This assessment should include destructive core testing to validate the in-situ concrete compressive strength. This detailed assessment should be c Provide results of preliminary calculations in space provided. a) column capacity; FoS > Safe b) column capacity; FoS Needs Evaluation c) Column capacity; FoS Needs Evaluation d) Column capacity; FoS < Unsafe In case of a critically low FoS (<1.25), consider Immediate Escalation Protocol If the structure has been previously expanded, was the structural impact on the entire structure analytically evaluated and confirmed by a qualified structural engineer. There is a horizontal & vertical expansion for which load impact on existing structure are not analytically evaluated. Document Review: Document review shows that there is a horizontal & vertical expansion for which load impact on existing structure are not analytically evaluated., Visual Assessment, Document Review: Document review shows that there is a horizontal & vertical expansion for which load impact on existing structure are not analytically evaluated., Visual Assessment Have a qualified structural engineer to complete an analytical evaluation of the structural impact of the addition. The Alliance for Bangladesh Worker Safety Page 5/12

6 21 May 2014 Reference Alliance Standards Part 8 Section 8.1 Applicability of Building Code. Where density of operations, storage of materials, or equipment weights require live load capacity in excess of 2.0 kn/m2 (42 psf), do the design documents confirm that the required load capacity exists? Or has the load capacity been analytically confirmed and certified by an Alliance-qualified structural engineer? The estimated floor load exceeds 42 psf in some storage area of 2nd and 4th floor( estimated load is about 66 psf). There is no analytical confirmation available for such load being accommodated in the design of the structure. Visual Assessment: Visual observation shows that the estimated floor load exceeds 42 psf in some storage area of 4th floor( estimated load is 66 psf). There is no analytical confirmation available for such load being accommodated in the design of the stru Have a qualified structural engineer confirm that capacity to support the load is available. Load Plans complying with Alliance Standard Part 8 Section should also be developed. Alliance Standards Part 8 Section 8.15 Minimum Floor Design Loads Are credible structural design documents available for review and kept on site? Non-Compliance Level: 2 Structural design documents are partially available for review and kept on site without design report. Document Review: Structural design documents are partially available for review and kept on site without design report. Have a qualified structural engineer to prepare credible as-built documents based on the requirements of Part 8 Section 8.19 of the Alliance Standard. Alliance Standard Part 8 Section 8.19 Required Structural Documentation for New and Existing Factories The Alliance for Bangladesh Worker Safety Page 6/12

7 21 May 2014 Can credible structural documentation indicating general conformance with 2006 BNBC or other comparable applicable international model building code be produced? Non-Compliance Level: 2 The design document does not clearly demonstrate the conformance with any applicable code. Document Review: Review of design documents does not clearly show conformity with codes. Engage a qualified structural engineer to develop the required documents to confirm the structural integrity of the buildings. Documents must comply with Alliance Standard Part 8 Section 8.19 and 8.20 Reference Alliance Standards Part 8 Section 8.2 Structural Integrity of Existing Factory Buildings Have provisions been made in floors or decks for a concentrated load (such as heavy equipment, water tanks, stored materials, etc) applied at a location wherever this load acting upon an otherwise unloaded floor would produce stresses greater than those caused by a uniform load? Non-Compliance Level: 2 Seven (7) nos. of 1000 liter capacity & three (3) nos. of 500 liter capacity water tanks are observed on cantilever part of the building. These all tank should be emptied/ removed immediately since preliminary calculations showing that the columns are ove Visual Assessment: Visual observation shows that seven (7) nos. of 1000 liter capacity & three (3) nos. of 500 liter capacity water tanks are observed on cantilever part of the building. These all tanks should be emptied/ relocated immediately since preli Relocate the water tanks from cantilever portion immediately under guidance of a qualified structural engineer.engage a qualified structural engineer to confirm and document that provisions have been made to accommodate concentrated loads. If provisions h The Alliance for Bangladesh Worker Safety Page 7/12

8 21 May 2014 Alliance Standard Part 8 Section 8.13 and 8.14 Can documentation be provided that the building is compliant with the requirements for wind loading and storm surge loadings as detailed in BNBC Part 6 Section 1.5.3? Non-Compliance Level: 1 There is no clear information available in the design documents to understand the consideration of wind loading & storm surge in the design of the building. Document Review: Design document review shows that there is no clear information available in the design documents to understand the consideration of wind loading & storm surge in the design of the building. Engage a qualified structural engineer to confirm satisfactory structural performance of the buildings under wind loading BNBC Part 6 Section 1.5. Compliance may be waived if the Factory Owner provides satisfactory evidence of a cyclone operations plan that includes full evacuation of the factory in advance of any approaching cyclone" Are Certificates of Occupancy available for review? Non-Compliance Level: 1 Certificates of Occupancy are not available for review. Organization is to apply for certificate of occupancy and obtain same as soon as possible from the concerned authority. Alliance Standard Part 8 Section 8.3 Preliminary Structural Assessment Structural System Construction Are the performance of key structural elements such as columns, slender columns, flat plates and transfer structures satisfactory? High The Alliance for Bangladesh Worker Safety Page 8/12

9 21 May 2014 Central Columns of the structure are found over-stressed in respect of vertical load calculation. But, there is no distinct sign that can prove the performance of key element are not satisfactory. Visual Assessment: Data from Visual observations shows that central Columns of the structure are found over-stressed in respect of vertical load calculation. But, there is no distinct sign that can proof the performance of key element are not satisfactory Engage a qualified structural engineer to confirm structural performance of the structure. Alliance Standard Part 8 Section Are all non-structural elements suspended from, attached to, or resting atop the structure adequately anchored and braced to resist earthquake forces? Non-Compliance Level: 2 In the store room there are racks which are not braced for earthquake force. There are 5 plastic water tanks with considerable height, which are not braced or anchored properly. Visual Assessment: Visual Inspection shows that in the store room, there are racks which are not braced for earthquake force. There are 5 plastic water tanks with considerable height, which are not braced or anchored properly. Adequately anchor and brace all non-structural elements to resist earthquake forces to comply with the BNBC and Alliance Standard Alliance Standards Part 8 Section 8.18 Seismic Bracing of Key Non-Structural Elements and 2006 BNBC Part 6 Have all areas of needed maintenance, including areas with efflorescence, dampness, standing water on rooftops, and corrosion been addressed. Non-Compliance Level: 1 Dampness is found at different location of the building.standing water on rooftops is found in the peripheral of plastic water tank in the cantilever part of the building. Visual Assessment: Visual observations shows the dampness at different location of the building. Standing water on rooftops is found in the peripheral of plastic water tank in the cantilever part of the building. The Alliance for Bangladesh Worker Safety Page 9/12

10 21 May 2014 Under guidance from a qualified structural engineer, address all areas of needed maintenance by correcting the identified issues. Alliance Standard Part 8 Section 8.26 Durability and Maintenance Is expansion joint material free from cracking and other forms of deterioration? Non-Compliance Level: 1 Cracking has developed at the building joint was no expansion joint was originally provided. Photograph: Cracking a location lacking an expansion joint. Have a qualified structural engineer provide further analysis of the the building joint to determine the appropriate course of corrective action. If necessary, structural engineer should include recommendations for installing an expansion joint where one Alliance Standard Part 8 Section 8.26 Durability and Maintenance Is the building free of active signs of water intrusion or ponding due to lack of performance of the façade system? Non-Compliance Level: 1 There is active signs of water intrusion due to lack of performance of the façade system Visual Assessment: Visual observation shows that there is active signs of water intrusion due to lack of performance of the façade system Repair the exterior façade system to prevent water intrusion. Alliance Standard Part 8 Section 8.26 Durability and Maintenance Structural Safety Programs Is a program in place to ensure that the live loads for which a floor or roof is or has been designed will not be exceeded? The Alliance for Bangladesh Worker Safety Page 10/12

11 21 May 2014 There is no program that will ensure that the designated load in each floor will not be exceeded Document Review: No evidence of existence of any program to control the live load on floor. Develop a program to ensure that all live loads for which a floor or roof has been designed for will not be exceeded. The designated Load Manager shall oversee this program and ensure it is enforced. Alliance Standard Part 13 Section 13.7 and Part 8 Section 8.9. Have Load Plans been prepared for each floor documenting the actual maximum operational loading that is intended and/or allowable on each floor. There is no load plan available showing the actual maximum operational loading that is allowable. Document Review: There is not load plan available in the documentation of the factory. Have a qualified structural engineer to develop Floor Loading Plans as per the requirements of Part 8 Section Alliance Standard Part 8 Section 8.10 Floor Loading Plans (Load Plans) Are Floor Load Plans posted as required? Floor load plans are not posted. Visual Assessment: Visual inspection of the factory does not show floor load plans being posted at each floor. Have a qualified structural engineer prepare load plans including the information required in Section 8.20 of the Alliance Standard and have it posted in all required location. The Alliance for Bangladesh Worker Safety Page 11/12

12 21 May 2014 Alliance Standard Part 8 Section Are areas used for storage of work materials and work products, clearly marked to indicate the acceptable loading limits as described in the Load Plan for that floor? There is no load plan. Also, there is no marking on the floor to designate spaces and height for storage of work materials. Visual Assessment: Visual inspection shows that there is no load plan. Also, there is no marking on the floor to designate spaces and height for storage of work materials. Have a qualified structural engineer prepare a load plan for each floor and have the floors marked for designating storage area as per the developed load plan Alliance Standard Part 8 Section 8.11 Floor Load Markings Is a designated representative (Factory Load Manager), who is onsite full time, trained regarding the structural floor capacity, and serves as an ongoing vendor resource and monitor of operational factory floor loadings? Non-Compliance Level: 1 There is no designated representative (Factory Load Manager), who is onsite full time, trained regarding the structural floor capacity, and serves as an ongoing vendor resource and monitor of operational factory floor loadings. Visual Assessment: Document Review Designate a representative as the Factory Load Manager. The Factory Owner shall ensure that at least one individual, the Factory Load Manager who is located onsite full time at the factory, is trained in calculating operational load characteristics of the Alliance Standards Part 8 Section 8.9 Factory Load Manager The Alliance for Bangladesh Worker Safety Page 12/12