m.s. attires limited -...
TRANSCRIPT
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M.S. ATTIRES LIMITEDLtd
A.Rahman Plaza, Shashongaon, Fatullah, Narayanganj(23.623569N, 90.476848E)
1st March 2015
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ObservationsBuilding 2
3Observations Building 2
High stress levels in some columns
4 Observations Building 2
Outline calculations indicate that a number of columns are very highly stressed under their current loading condition, particularly under toilet areas. Columns in other areas are highly stressed.
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5Observations Building 2
High shear stress levels in flat slabs at columns
6 Observations Building 2
Outline calculations indicate that the slab is highly stressed under current loading conditions at some locations, particularly under toilet areas.
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Discrepancies between drawingsand site observations
Observations Building 2
8Observations Building 2
Additional grid of columns observed on site (shown with red rectangle) not shown in the drawings
Dimensions of the columns given in schedule differ from site observations (shown with red circle)
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ObservationsBuilding 1
10Observations Building 1
High stress levels in some columns
11 Observations Building 1
Outline calculations indicate that a number of columns are very stressed under their current loading conditions.
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Discrepancies between drawingsand site observations
Observations Building 1
13Observations Building 1
Dimensions of the columns given in schedule differ from site observations (shown with red ellipse)
Columns shown in the drawings differ from those observed on site
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Additional column adjacent to staircase not shown in drawings
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Apparently non-engineered roof structure
Observations Building 1
15Observations Building 1
Roof structure over staircase appears non-engineered
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Priority Actions
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Problems ObservedBuilding 2ITEM 1: High stress levels in some columnsITEM 2: High shear stress levels in flat slabs at columnsITEM 3: Discrepancies between drawings and site observations
Building 1ITEM 1: High stress levels in some columnsITEM 2: Discrepancies between site observations and information on drawingsITEM 3: Apparently non-engineered roof structure
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Item No. Observation Recommended Action Plan Recommended Timeline
1Building 2
High stress levels in some columns
Quantity of rebars in columns to be confirmed by exposing locally.
Immediate - Now
2Building 2
High stress levels in some columns
Engineer to review design, loads and column stresses in all columns.
Immediate - Now
3Building 2
High stress levels in some columns
Verify insitu concrete strength by taking an minimum of 4 No. 100mm diameter cores from columns . Verify grade of steel reinforcement used.
Immediate - Now
4Building 2
High stress levels in some columns
A Detail Engineering Assessment to be commenced on Building 1, see attached Scope.
Immediate - Now
5Building 2
High stress levels in some columns
Detail Engineering Assessment to be completed on Building 2.
6-weeks
6Building 2
High stress levels in some columns
Verify insitu concrete strength by taking an minimum of 4 No. 100mm diameter cores from columns . Verify grade of steel reinforcement used.
6-weeks
7Building 2
High stress levels in some columns
Continue to implement load plan 6-months
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Item No. Observation Recommended Action Plan Recommended Timeline
8Building 2
High shear stress levels in flat slabs at columns
Engineer to review design, loads and flat slab shear stresses at all slab/column junctions.
Immediate - Now
9Building 2
High shear stress levels in flat slabs at columns
Verify insitu concrete strength by taking an minimum of 4 No. 100mm diameter cores from slabs .
Immediate - Now
10Building 2
High shear stress levels in flat slabs at columns
Verify grade and quantity of steel reinforcement used in slabs at the beam/column junctions.
Immediate - Now
11Building 2
High shear stress levels in flat slabs at columns
A Detail Engineering Assessment to be commenced on Building 1, see attached Scope.
Immediate - Now
12Building 2
High shear stress levels in flat slabs at columns
Detail Engineering Assessment to be completed on Building 2.
6-weeks
13Building 2
High shear stress levels in flat slabs at columns
Produce and actively manage a loading plan for all floor plates within the factory giving consideration to floor capacity and column capacity.
6-weeks
14Building 2
High shear stress levels in flat slabs at columns
Continue to implement load plan 6-months
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This Schedule develops a minimum level of information, Analysis and testing expected as part of a Detail Engineering Assessment.The Building(s) have been visually assessed and it is deemed necessary that a detailed engineering assessment be carried out by a competent Engineering Team employed by the factory Owner. This Request should be read in conjunction with the BUET developed Tripartite Guideline document for Assessment of Structural Integrity of Existing RMG Factory Buildings in Bangladesh (Tripartite Document), the latest version of this document should be referenced. T his document also gives guidance on required competency of Engineering Team.
We expect that the following will be carried out:1. Development of Full Engineering As-Built Drawings showing Structure, loading, elements, dimensions , levels, foundations and framing on Plan,
Section and Elevational drawings .2. The Engineering team are to carry out supporting calculations with a model based design check to assess the safety and serviceability of the building
against loading as set out in BNBC-2006, Lower rate provisions can be applied in accordance with the Tripartite Guidelines following international engineering practice, justification for these lower rate provisions must be made.
3. A geotechnical Report describing ground conditions and commenting on foundation systems used/proposed.4. A report on Engineering tests carried out to justify material strengths and reinforcement content in all key elements studied.5. Detailed load plans shall be prepared for each level showing current and potential future loading with all key equipment items shown with associated
loads.6. The Engineering team will prepare an assessment report that covers the following:
• As-Built drawings including• Plans at each level calling up and dimensioning all structural components • Cross sectional drawings showing structural beams, slabs, floor to floor heights, roof build-ups and Basic design information of the
structure• Highlight any variation between As-built compared to the designed structure• Results of testing for strength and materials• Results of geotechnical assessment and testing/investigation• Details of loading, inputs and results of computer modelling• Commentary on adequacy/inadequacy of elements of the structure• Schedule of any required retrofitting required for safety or performance of Structure
Any proposals for Retrofitting to follow guidance developed in the Tripartite Document
Detail Engineering Assessment
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Item No. Observation Recommended Action Plan Recommended Timeline
15Building 2: Discrepancies
between drawings and site observations
As part of the DEA (see Item 1 and 2 above) the Factory Engineer to prepare as built structural drawings.
6-weeks
16Building 2: Discrepancies
between drawings and site observations
The Factory Engineer to prepare Loading Plan drawings which incorporate the maximum allowable loading which can be applied to each floor area inclusive of live loading due to personnel, taking into account the capacity of the slab, beams and columns.
6-weeks
17Building 2: Discrepancies
between drawings and site observations
Implement the loading plan based on the engineering study 6-months
18Building 1
High stress levels in some columns
Engineer to review design, loads and column stresses in all columns.
6-weeks
19Building 1
High stress levels in some columns
Verify insitu concrete strength by taking an minimum of 4 No. 100mm diameter cores from columns . Verify grade and quantity of steel reinforcement used.
6-weeks
20Building 1
High stress levels in some columns
Produce and actively manage a loading plan for all floor plates within the factory giving consideration to floor capacity and column capacity.
6-weeks
21Building 1
High stress levels in some columns
Continue to implement load plan 6-months
22Building 1: Discrepancies
between site observations and information on drawings
Factory Engineer to prepare a set of as built drawings to reflect the actual column locations, dimensions and reinforcement.
6-months
23Building 1: Apparently non-engineered roof structure
Building engineer to check the capacity of the roof structure above stairs and make any necessary alterations.
6-months