cassiopea fashions ltd. - fair factories...

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Cassiopea Fashions Ltd.Bokran, Monipur, Vabanipur, Gazipur.

(24.127427, 90.399544)15 April 2014

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Observations Made

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No apparent stability system


Bracing members in Steel Building have not been constructed from ground to 3rd floor.

6th floor

G-2nd floor (double-height space)

No other apparent stability system provided. Frame does not appear sufficient to provide

moment action.

Steel Building


Ground, first and typical floor drawings all show vertical bracing.

Building is not constructed in line with the structural or permit drawings.

Drawings indicate that the building was constructed to 4

storeys and a 3 storey extension was later added

No bracing is present in the original 4-storey construction

Steel Building


Main Building

Beam and slab construction at G and 1st floor. All other floors

are flat slab.

Movement joint

Single lift core with concrete shear walls does not appear to be sufficient

to stabilise the building. No shear walls to other side of movement joint.

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Missing bracing

Missing bracing

Bracing members in Steel Building have been

removed from 5th and 6th

floor

Bracing members in Fabric Warehouse have been

disconnected

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Non-engineered structures


In Dry Process Area, structure appears to be non-engineered. No apparent

consideration of stability or design of connections and member sizes appear

inadequate.

Trusses rest on glass partition, which is leaning and is at risk of collapse.


Partially propped cantilevering canopy over entrance to Main Building has no apparent lateral stability system (in plane bracing).

Members appear undersized to resist high wind loads


Truss sections supported on rebar in Power House

Compressor & Pump Room structure appears non-

engineered, with no apparent stability system and some trusses lack any

diagonal members.

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Cracking in the slabs and perimeter beams

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Cracking in the slabs and beams

Flexural cracking to slabs on all floors of Main

Building.

Evidence of previous repairs noted at first floor.

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Cracking in the slabs and beams

In Main Building, diagonal cracking to some perimeter beams is apparent at column locations.

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High loading on floors

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High loading on floors

On 6th floor of Steel Building, water tanks are temporarily located. Each tank has a capacity of 10,000L but are apparently maintained at 1/3 full. However, no system

appears to be in place to prevent overfilling and consequently overloading.

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Water build-up on slabs

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Water build-up on slabs

Standing water on slab on ground floor of Main Building has washed away

concrete fines, creating corrosion risk

Standing water on slab under water storage tanks on 6th floor of Steel

Building, creating corrosion risk

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Welding in Steel Building

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Welding in Steel Building

Steel I-sections are made from lengths of plate, welded into longer lengths

and then welded into I-shape.

In some cases, plates are not fully aligned.

Stiffeners are generally tack-

welded.

Beams are connected to deck through

intermittent self-tapping screws. No composite

action is present.

Lighting arrays and other services have been later

welded to steel structure.

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Proposed additional floor in Main Building

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Proposed additional floor

New concrete extension on roof of Main Building is

proposed (as per permit and structural drawings)

Steel canopies on roof are in the process of being

dismantled.

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Priority Actions

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Problems Observed

1. No apparent stability system in Steel Building or Main Building.

2. Non-engineered structures – Dry Process, entrance canopy to Main Building , Power House and Compressor & Pump Room: stability, connection, member sizes issues.

3. Cracks in slabs and beams in Main Building.4. Missing vertical bracing in Steel Building and Fabric

Warehouse. 5. High loading on slab from water tanks in Steel Building. 6. Water build-up on slabs in Main Building and Steel Building.7. Welding in Steel Building.8. Proposed additional concrete floor to replace steel canopy.

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Item No. Observation Recommended Action Plan Recommended Timeline

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No apparent stability system in Steel Building or Main Building. Buildings to be

assessed by Building Engineer and upgraded as required

Engage Building Engineer to review stability of Steel Building and Main Building.

6-weeks

2



In Steel Building, diagonal bracing to be reinstated as shown on the structural drawings, with any upgrades as specified by the Building Engineer

6-weeks

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Complete the reinstatement of bracing and upgrades to stability system of Steel Building and Main Building as specified by Building Engineer.

6-months

4

Dry Process, entrance canopy to Main Building, Power

House and Compressor & Pump Room are non-

engineered structures.

The above structures should be designed and upgraded to support code vertical and wind loads by the Building Engineer, or they should be vacated and removed.

6-weeks

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Structures to be upgraded as per building engineers design. 6-weeks

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Engineer to submit design for revised structures, if required. 6-months

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7Cracks in slabs of Main

Building.Sections of plaster finish to beams and slabs to be removed to investigate if cracks penetrate the building structure.

6-weeks


Building.If cracks penetrate the structure, Building Engineer to carry out design check on beams and slabs.

6-weeks


Building.Conduct regular inspections to monitor cracks. 6-months


Building.

If additional cracks appear or existing cracks increase in size, remove all items above the slabs and close working areas below the affected areas. Engage Building Engineer to investigate, repair and strengthen the slab.

6-months

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Vertical bracing in the Steel Building and Fabric

Warehouse is missing. The bracing should be reinstated.

Reinstate bracing in Steel Building at 5th floor and 6th floor, where it has been temporarily removed.

6-weeks

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Vertical bracing in the Steel Building and Fabric

Warehouse is missing. The bracing should be reinstated.

Reinstate bracing in Fabric Warehouse, where it has been temporarily disconnected.

6-weeks

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13

Localised areas of high loading on certain floor

plates, including water tanks on 6th floor of Steel Building.

Clear notices to be placed on tanks showing limit on filling height.

6-weeks

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Tanks to be inspected daily to check that they are not being overfilled.

6-weeks

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Building Engineer to create controlled loading plans for all floors in all buildings, designating where tanks and storage can or cannot be placed, and to what height.

6-months

16Water build-up on slabs on

ground floor of Main Building and 6th floor of Steel Building

Remove water build-up on 6th floor slab in Steel Building. Provide sufficient waterproofing (e.g. membrane) to prevent water ingress into structure.

6-weeks



Remove water build-up from ground floor 6-weeks



Inspect and maintain waterproof membrane at regular intervals.

6-months

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Welded beam and column sections in Steel Building to

be inspected by Building Engineer

Building Engineer to inspect the quality of the constructed steel sections in the building, with particular attention to be given to the section capacity of the welded plate column sections.

6-months

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Welded beam and column sections in Steel Building to

be inspected by Building Engineer

Factory to Implement any recommendations made by the Building Engineer.

6-months

21Proposed additional concrete floor to replace steel canopy.

Prior to adding additional concrete storey to Main Building, verify concrete strength in columns by in-situ testing and review with Building Engineer.

6-months

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