Amazon Tex Knit Fashion LtdJobeda Plaza, 85 AC Dhar Road Kalirbazar, Narayangonj

(23.619697N, 90.502318E)10 May 2014

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Observations

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Discrepancies between drawings and as-built structure

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Structural drawings show 8” (200mm) flat slab. Actual slab is only 150-160mm. Punching shear is a concern.

Slab thickness

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Drawings state that internal columns (C-3) have 16 x 20mm dia. bars. At roof level only 12 bars are visible and Ferroscan at 1st floor also shows 12 bars (it was not possible to scan the columns at ground floor).

Internal column reinforcement

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The size, position and orientation of some edge columns is different from the structural drawings; some of the principal differences are shown opposite.

Columns position & orientation

X X X

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Potential punching shear problems on stair column due to short column perimeter

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Slab not bearing over entire column plan area.

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GF column concrete appears to be stone chip with small fragments of brick

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On ground floor level stone chip aggregate was observed with brick fragments.

On the upper 3rd and 4th floors piles of brick chip aggregate were observed suggesting that for the newer upper floor construction brick aggregate was used.

Brick aggregate observed on 3rd floor

Exposed concrete on ground floor

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Site safety/security

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The third and fourth floor of the building are currently under construction. A number of observations were made in relation to construction security/safety. These are:- The stairwell was not closed off. - No handrail was provided in the stairwell for these floors.- No edge protection around perimeter of the floors.

Third floor stairwell No edge protection

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Priority Actions

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Problems Observed

ITEM 1 - Punching shear in flat slab.ITEM 2 - High column stresses once upper floors are brought into use.ITEM 3 - Position/orientation of edge columns differs from drawings.ITEM 4 - No edge protection to 3rd and 4th floor slab and stairs under construction

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Item No. Observation Recommended Action Plan Recommended Timeline

1 Punching shear in flat slabsBuilding Engineer to check shear capacity of flat slabs throughout as part of a Detailed Engineering Assessment (see scope overleaf).

6-weeks

2 Punching shear in flat slabsVerify insitu concrete stresses by taking 100mm slab cores from at least 4 locations. Building engineer to define safe location for cores in middle of bay.

6-weeks

3 Punching shear in flat slabsProduce and actively manage a loading plan for all floor plates within the factory giving consideration to floor capacity.

6-weeks

4 Punching shear in flat slabs Undertake remedial works recommended by the DEA. 6-months

5 Punching shear in flat slabs Continue to implement loading plan. 6-months

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This Schedule develops a minimum level of information, analysis and testing expected as part of a Detailed 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. This document also gives guidance on required competency of the 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 elevation 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.

Detailed Engineering Assessment

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Item No. Observation Recommended Action Plan Recommended Timeline

6High column stresses once

upper floors are brought into use

As part of punching shear check (Item 1) Building Engineer to review design, loads and columns stresses in edge columns

6-weeks

7High column stresses once

upper floors are brought into use

Verify insitu concrete stresses either by 100mm diameter cores from 4 columns or existing cylinder strength data. Structural engineer to determine safe locations for cores to be taken.

6-weeks

8High column stresses once

upper floors are brought into use

Produce and actively manage a loading plan for all floor plates within the factory giving consideration to floor capacity and column capacity.

6-months

9Position/orientation of edge

columns differs from drawings.

Building engineer to confirm the as-built columns are adequate in the positions in which they have been constructed.

6-months

10Position/orientation of edge

columns differs from drawings.

Carry out remedial works if required. 6-months

11No edge protection to 3rd and 4th floor slab and stairs under

construction

All edges at height including stairs and suspended slab to be made safe by edge protection or restricted access.

6-months