EQUIVALENT INITIAL STRUCTURAL SAFETY ASSESSMENT

Transcription

1 EQUIVALENT INITIAL STRUCTURAL SAFETY ASSESSMENT Factory C.D.A Plot No. C-49, Sagarika Road, Pahartaly, Chittagong Chittagong 18 May 2014 The Alliance for Bangladesh Worker Safety Page 1/12

2 18 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 18 May 2014 GENERAL INFORMATION General Information Factory Country: Province: City: Bangladesh Chittagong Chittagong Zip Code: 4219 Audit Duration: Re-Audit: 1 Days 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) : Approximate Ancillary N/A 1 Main Buildings 1 Ancillary Building 6 (Grade + 5) sf No renovations or additions have been performed. No 1) Single story prefab Generator & pump shed. 1 (Grade) 529 sft. The Alliance for Bangladesh Worker Safety Page 3/12

4 18 May 2014 Structures Area (SF) : Number of Occupants : 1117 Exterior Facade Description : Structural System Description : RCC frame structure with infilled masonry walls. Exterior face of the masonry wall is of plaster and paint. The windows are of swinging glass type. Moment Resisting Frame with monolithic beam slab. Foundation is spread footing. Frame system is regular. The Alliance for Bangladesh Worker Safety Page 4/12

5 18 May 2014 ASSESSMENT FINDINGS Structural System Design Are the available FoS for the columns adequate based on Preliminary calculation? High Non-Compliance Level: 3 FoS of the columns (considering live load of 42 psf, and concrete strength of 2045 psi) are not adequate based on preliminary calculations: Central column FoS = 1.11 Edge column FoS = 1.82 Corner column FoS = 1.25 Uploaded Document: FoS calculation spreadsheet Under guidance from a qualified structural engineer arrange an urgent detail engineering assessment of the structure to be carried out immediately. Concrete compressive strength should be evaluated via coring and necessary remediation should be completed 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 built after 2006, can documented compliance with the seismic and wind requirements of the 2006 BNBC be provided? Non-Compliance Level: 3 Seismic and wind forces are mentioned in the structural general notes, but there is no evidence of seismic detailing. Additionally, no calculations of seismic force are available. Document Review: Shows that Seismic and wind forces are mentioned in the structural general notes, but there is not enough information available to show compliance with the 2006 BNBC. Have a qualified structural engineer document compliance with the seismic and wind requirements stated in the 2006 BNBC. Alliance Standards Part 8 Section 8.17 Design for Lateral Loads and 2006 The Alliance for Bangladesh Worker Safety Page 5/12

6 18 May 2014 BNBC Part 6 Section 1.5 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: 3 Wind forces are mentioned in the structural general notes, but there is no evidence of proper detailing against lateral forces. Document Review: shows that there is not enough available information to demonstrate compliance with the 2006 BNBC. Engage a qualified structural engineer to confirm satisfactory structural performance of the buildings under wind & storm surge 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 credible structural design documents available for review and kept on site? There are available as-built structural drawings, but they appear to be incomplete. There are no drawings for column & footing layout plan, column & footing schedule, grade beam layout plan, floor beam layout and long sectional details, floor slab details Document Review: The available as-built drawings are incomplete. Have a qualified structural engineer 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 Can credible structural documentation indicating general conformance with 2006 BNBC or other comparable applicable international model building code be produced? The Alliance for Bangladesh Worker Safety Page 6/12

7 18 May 2014 The available structural documentation does not indicate general conformance with BNBC 2006 or another comparable applicable international model building code. Document Review: shows that design documents do not clearly show conformity with any building code. 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? There are 4 plastic water tanks (2 with 3000L capacity, 1 with 2000L capacity, 1 with 1000L capacity) at the east side of the roof. 2 plastic water tanks (3000L) were observed at the middle of the roof. These tanks are not documented in the structural dra Document Review: Document review shows that there is no analytical evidence to show that capacity exists to accommodate these tanks., Visual Assessment, Document Review: Document review shows that there is no analytical evidence to show that capacity exists to accommodate these tanks., Visual Assessment Engage a qualified structural engineer to confirm and document that provisions have been made to accommodate concentrated loads. If provisions have not been made, have a qualified structural engineer develop a remediation plan. Alliance Standard Part 8 Section 8.13 and 8.14 Is a Geotechnical Report available for review and kept on site? Low Geotechnical report is available for review and kept on site. Engineer s name and signature are available, but MIEB number was not found. Document Review: Engineer's signature lacks MIEB number. The Alliance for Bangladesh Worker Safety Page 7/12

8 18 May 2014 Under guidance from a qualified structural engineer arrange geotechnical investigation at close vicinity of the structure and make the report available for review. Alliance Standard Part 8 Section 8.2 Structural Integrity of Existing Factory Buildings Structural System Construction Is the structural system free of distress, settlement, shifting, or cracking in columns or walls? High Some hair cracks have been found on brick wall surface at the 5th floor. Visual Assessment: Visual inspection shows that some hair cracks have been found on brick wall surface at the 5th floor. Have a qualified structural engineer provide further testing and analysis of distress, settlement, shifting, or cracking in columns or walls and provide a remediation plan to correct noted issues. Alliance Standard Part 8 Section If yes, have the structural members constructed with MCAC been investigated by an appropriate program of in-situ testing and representative destructive testing or core samples? Non-Compliance Level: 3 The structural members constructed with MCAC have not been investigated by an appropriate program of in-situ testing and representative destructive testing or core samples. NDT was performed to determine the concrete strength, and preliminary calculations Visual Assessment: Visual assessment shows that the columns constructed of MCAC are over-stressed. Conduct a detailed structural assessment under the guidance of a qualified structural engineer and carry out remedial action as necessary. Reference Alliance Standards Part 7 Building Materials Section 7.2 Masonry- The Alliance for Bangladesh Worker Safety Page 8/12

9 18 May 2014 chip aggregate concrete (MCAC) Have all areas of needed maintenance, including areas with efflorescence, dampness, standing water on rooftops, and corrosion been addressed. Several masonry cracks have been observed at the 5th floor brick wall. Visual Assessment: Visual observation shows that there are several masonry cracks in the 5th floor brick wall. 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 Are any structural elements constructed with MCAC exposed to rainfall or other sources of water sealed with a protective coating to prevent water intrusion? The roof of all the buildings are of MCAC but no protective sealing is provided. Visual Assessment: Visual assessment shows that the roof of the buildings are of MCAC but no protective sealing is provided. Provide a protective coating at the structural elements constructed with MCAC exposed to rainfall or other sources of water. Have protective coating approved by the Alliance or a qualified structural engineer. Alliance Standards Part 7 Building Materials Section 7.2 Masonry-chip aggregate concrete (MCAC). Are all non-structural elements suspended from, attached to, or resting atop the structure adequately anchored and braced to resist earthquake forces? There are 4 plastic water tanks at the east side of the roof, and 2 plastic water tanks at the middle of the roof which are not properly braced. Visual Assessment: Visual assessment shows that plastic water tanks are not The Alliance for Bangladesh Worker Safety Page 9/12

10 18 May 2014 properly braced against lateral forces. Adequately anchor and brace all non-structural elements to resist earthquake forces to comply with the BNBC and Alliance Standard. 08 Sep 2014 Alliance Standards Part 8 Section 8.18 Seismic Bracing of Key Non-Structural Elements and 2006 BNBC Part 6 Is expansion joint material free from cracking and other forms of deterioration? Low There is an expansion joint which is filled with mortar. This will make the expansion joints ineffective. Visual Assessment: Visual assessment shows that there is an expansion joint which are filled with mortar. This will make the expansion joints ineffective. Remove blockages from the expansion joint. 08 Sep 2014 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? There is no program that will ensure that the designated load in each floor will not be exceeded. Visual Assessment: From the visual assessment, there is no program that will ensure that the designated load in each floor will not be exceeded. 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. 14 Jul 2014 Alliance Standard Part 13 Section 13.7 and Part 8 Section 8.9. The Alliance for Bangladesh Worker Safety Page 10/12

11 18 May 2014 Are Floor Load Plans posted as required? Low Floor load plans are posted but do not comply with the Alliance Standard. Document Review: Document review shows that floor load plans do not comply with the Alliance Standard., Visual Assessment, Document Review: Document review shows that floor load plans do not comply with the Alliance Standard., Visual Assessment Have a qualified structural engineer prepare load plans including the information required in Section 8.20 of the Alliance Standard. 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? Low There is no standard load plan that complies with the Alliance Standard. Also, there is no marking on the floor to designate spaces and height for storage of work materials. Visual Assessment: Visual assessment shows that there is no standard load plan as per Alliance. Also, there is no marking on the floor to designate spaces and height for storage of work materials. Provide signage or the appropriate markings at all areas used for storage to indicate the acceptable loading limits detailed in the Load Plan. Alliance Standard Part 8 Section 8.11 Floor Load Markings Have Load Plans been prepared for each floor documenting the actual maximum operational loading that is intended and/or allowable on each floor. Low Non-Compliance Level: 1 The load plans are available but do not comply with the Alliance Standard. Document Review: Visual assessment shows that the load plans are available but do not comply with the Alliance Standard. The Alliance for Bangladesh Worker Safety Page 11/12

12 18 May 2014 Have a qualified structural engineer develop Floor Loading Plans per the requirements of Part 8 Section Alliance Standard Part 8 Section 8.10 Floor Loading Plans (Load Plans) The Alliance for Bangladesh Worker Safety Page 12/12