star garments (pvt ltd.) - the bangladesh accord on fire...
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Star Garments (Pvt Ltd.)Sha-23, Middle Badda, Dhaka.
(23.780094N, 90.426299E)
02 July 2014
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Observations
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Inconsistencies between the drawings and the as constructed building
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Observation Factory building – typical floor layout, actual column distribution
Irregularities on drawings - Column and Cores
Column missingConcrete core
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Expansion Joint
Factory building – typical floor layout
Expansion JointEvident on roof where waterproofing detail has been applied. Double columns evident along line of EJ (not shown on drawings)
Observation
Expansion Joint not shown on drawings
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Cantilever on E side of buildingCantilever extension to provide space for Toilet block
Observation
Cantilever on E side not shown on drawings
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Loading on Roof
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8 Observations - Concrete water tank on the roof
Factory building – typical floor layout
Concrete water tank
RC water tank on the roof3.35m x 5.5m x 1.2m dp water reservoir located at Roof level.The long S side of the water reservoir is supported along the column line (assumed to be on two columns), but the N side supported on stub columns directly on roof slab.Ponding of water at the base of the stub columns indicated some deflection; however no distress in the slab was noticed from under side (3rd Floor ceiling)
North
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9Observations – Toilet built up
Built up toilet
Factory building – typical floor layout
Toilet built upFloor build-up in the toilet area measured as 150mm, over approximately 50% floor area (within cubicles). Some isolated areas had build-up of 230mm.Additional loads on cantilever at E end (not shown on drawings) and resultant increased loading on columns providing support to the cantilever
North
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Observed Cracking
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11Observations - cracking
CracksCracking was noted in a number of beams both vertically and horizontally, and on some façade wallsVertical cracks observed in beams were small and consistent in width down the depth of the beam –appeared to be shrinkage cracksHorizontal cracks in beams coincided with EJ; due to lack of EJ detail allowing movementCracking of façade brick walls also coincident with EJ
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Testing on Columns
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13Observations – concrete in columns
RC columnsTwo columns opened up for testing at Basement level – consistent and good readingsConfirmed stone aggregate concreteUsing Ferroscanner, both rapid scan and detailed scan indicated 6 rebars on long face of internal columns –corresponds to rebar details on Structural drawings, and bars projecting from columns at roof level
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Problems Observed
1. Water reservoir on suspended floor slab
2. Inconsistencies Between Drawings and As Built Construction
3. Future vertical extensions
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Item No. Observation Recommended Action Plan Recommended Timeline
1Water reservoir on suspended
floor slabThe roof slab needs to have its design verified by the Building Engineer for the imposed load of the water tank.
6-months
2Inconsistencies Between
Drawings and As Built Construction
Building Engineer to check, collect information and produce accurate and complete as-built documentation.
6-months
3
Columns may be highly stressed if building is
extended vertically (as planned on permit and
structural drawings)
No vertical extension to be carried out without the following actions being addressed
6-months
4
Columns may be highly stressed if building is
extended vertically (as planned on permit and
structural drawings)
Factory Engineer to review design, loads and columns stresses
6-months
5
Columns may be highly stressed if building is
extended vertically (as planned on permit and
structural drawings)
Verify insitu concrete stresses either by 100mm dia. Cores from at least 4 columns
6-months
6
Columns may be highly stressed if building is
extended vertically (as planned on permit and
structural drawings)
Produce and actively manage a loading plan for all floor plates within the factory giving consideration to floor capacity and column capacity
6-months