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All Weather Fashions Ltd (10451) - The Bangladesh Accord...
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All Weather Fashions Ltd (10451) 52, Shahid Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1213, Bangladesh
(+23.774852N, 90.398619E)
03.MARCH.2014
Client Summary Report
Observations & Actions Written By Anthony Liu – 04.03.14
Reviewed By Thai Tang Anh – 04.03.14
Approved By Geoff Minto – 07.03.14
Revision : Issue 01
Date: 07.03.2014
RED
Executive Summary
On 03.03.2014 Mr Anthony Liu (lead) and Mr Thai Tang Anh carried out a visual structural survey of the All Weather Fashions Ltd factory at the address and co-ordinates given on the cover page of this report. We met with M. A. Karim (Director and Chairman). We were further accompanied by Mr Mahmoodur Rhamen from Kaymonto and Partners We were provided with copies of Architectural and Engineering Design drawings and these appeared to be permit drawings. We were informed that the buildings dated from 2000. These drawings generally matched the actual site conditions. The factory building is used for garment manufacturing on all floors of the building We inspected the whole building, which was made accessible to us in all parts, only to look for conditions concerning imminent danger to people, and identified potential issues which do not pose imminent danger to the stability of the building, but which should be fully checked by the building engineer and the appropriate remedial steps taken, We have major concern with the structure and the loading. We require immediate checking of building stability by the qualified building engineer. We do have some important and urgent concerns that need to be addressed immediately, which gave rise to our recommendation for an immediate Detailed Engineering Assessment (see Item 1 action below). The principal reasons for our concerns are: 1. Overall building loading on the columns is exceeded when using the design code minimum live
load assignment 2. Overloading of certain areas of the factory floor, particularly in storage areas
Executive Summary (continued)
At this point we do have reason to recommend a partial or complete suspension of operations in the facility due to these concerns (subject to immediate responses to the required actions noted at the end of this report). Further actions with associated priorities and timeframes are given at the end of this report. Please note that these actions should be completed as soon as possible and certainly within the timeframe noted. We have reviewed the property from an outline seismic perspective and would consider that the building along with many others in the Dhaka region to have a significant risk in a major Seismic event. We have some concerns with the stability system in day to day loading conditions and require this be addressed in a Detailed Engineering Assessment. We have carried out some on-site testing and preliminary analysis to support the findings of this report. Our Limitations and Assumptions are also noted at the end of this report. This short report has 4 sections namely: 1. Executive Summary (this section) 2. Short Graphical Section showing key issues observed 3. Priority Action List 4. Limitations and Assumptions
Building Extents
Factory located behind fuel filling
station
Building Extents (Front Elevation)
9-storey reinforced concrete building
Longitudinal
column grid
spacing of 5.8m
Maximum
transverse
column grid
spacing of
4.57m
Building Extents
Adjacent 6-storey building with
internal connection to main building
Adjacent building
is claimed to be
rented.
Building Permission Layout Building 1: Main Factory
Building Extents
Building Extents
------- Movement Joint
Longitudinal Section and Elevation
(basement floor drawing only)
Longitudinal Cross-Section
(not showing structure above)
Building Extents
Cross Section of Building (basement floor drawing only)
Transvere Cross-Section
(not showing structure above)
Building Extents
R.C Beam and column
frame with a 2-way solid
slab
Stability provided by
movement frame action
and brick in-fill walls
Slab Thickness 152 mm
Column Size 305x457mm (typ.)
Grid 5.800m x 4.570m
------- Movement Joint
Typical Floorplan (1st to 8th floor)
with structural grid
Building Extents
------- Movement Joint
Movement Joint inside building
------- Movement Joint
Identified Priority 1 Concerns
AVERAGE INTERNAL COLUMN STRESS (*)
(*) Instructions: Only overwrite red valuesFactory name
CASE I CASE II
No. Floors
supported INCL
ROOF
10 max. 20 (including roof)
Selfweight Finishes
Apparent
Live Load
Code Live
Load
Basement (Y/N) yes
Construction date Loading on roof 5.1kPa 1.5kPa 0.2kPa 0.2kPa
Loading on 8th 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Column size 0.30 x 0.46 m Loading on 7th 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Grid (LxT) 5.80 x 4.57 m Loading on 6th 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Beam L 0.25 x 0.53 m Loading on 5th 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Beam T 0.25 x 0.53 m Loading on 4th 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Slab thickness m Loading on 3rd 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Floor-ceiling height m Loading on 2nd 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Loading on 1st 5.1kPa 1.0kPa 2.0kPa 3.0kPa
Hyperstatic effect 10% Loading on GF 5.1kPa 2.5kPa 2.0kPa 3.0kPa
Basement 5.10 1.0kPa 2.0kPa 3.0kPa
Concentated load 5.0 kN 5.10 1.0kPa 2.0kPa 3.0kPa
on column 5.10 1.0kPa 2.0kPa 3.0kPa
Column agregate Brick 5.10 1.0kPa 2.0kPa 3.0kPa
Rebar % 4.30 % 5.10 1.0kPa 2.0kPa 3.0kPa
5.10 1.0kPa 2.0kPa 3.0kPa
Limits (MPa) X Y 5.10 1.0kPa 2.0kPa 3.0kPa
9.4 11.9 5.10 1.0kPa 2.0kPa 3.0kPa
5.10 1.0kPa 2.0kPa 3.0kPa
Apparent w orking stress 17.0 MPa 5.10 1.0kPa 2.0kPa 3.0kPa
Case II w orking stress 18.9 MPa
kN
Concrete stress is greater than Z MPa (FOS less than 1.25). RED (See guidance)
2.895
Total unfactored
column load (kN)2373
All Weather Fashions
52 Shahid Tajuddin Ahmed Sarani
Mohakhali, Dhaka 1213
before 2005
0.152
Z
14.4
Based on the load rundown analysis following
the agreed minimum design live load
assignment, the columns seem significantly
insufficient in carrying the dead and live loads
from the 9 storey building, giving a firm RED
warning. The building was constructed in year
2000, with brick aggregate, with total of 9
storeys (including roof) and 1 full basement
floor.
1st Priority 1 Concern
Column Load Exceeds
Allowable Limit by Code
AVERAGE INTERNAL COLUMN STRESS (*)
(*) Instructions: Only overwrite red valuesFactory name
CASE I CASE II
No. Floors
supported INCL
ROOF
10 max. 20 (including roof)
Selfweight Finishes
Apparent
Live Load
Code Live
Load
Basement (Y/N) yes
Construction date Loading on roof 5.1kPa 1.5kPa 0.2kPa 0.2kPa
Loading on 8th 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Column size 0.30 x 0.46 m Loading on 7th 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Grid (LxT) 5.79 x 4.57 m Loading on 6th 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Beam L 0.25 x 0.53 m Loading on 5th 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Beam T 0.25 x 0.53 m Loading on 4th 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Slab thickness m Loading on 3rd 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Floor-ceiling height m Loading on 2nd 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Loading on 1st 5.1kPa 1.0kPa 1.0kPa 3.0kPa
Hyperstatic effect 10% Loading on GF 5.1kPa 2.5kPa 1.0kPa 3.0kPa
Basement 5.10 1.0kPa 2.0kPa 3.0kPa
Concentated load 5.0 kN 5.10 1.0kPa 2.0kPa 3.0kPa
on column 5.10 1.0kPa 2.0kPa 3.0kPa
Column agregate Brick 5.10 1.0kPa 2.0kPa 3.0kPa
Rebar % 4.30 % 5.10 1.0kPa 2.0kPa 3.0kPa
5.10 1.0kPa 2.0kPa 3.0kPa
Limits (MPa) X Y 5.10 1.0kPa 2.0kPa 3.0kPa
9.4 11.9 5.10 1.0kPa 2.0kPa 3.0kPa
5.10 1.0kPa 2.0kPa 3.0kPa
Apparent w orking stress 15.1 MPa 5.10 1.0kPa 2.0kPa 3.0kPa
Case II w orking stress 18.9 MPa
kN
Concrete stress is greater than Z MPa (FOS less than 1.25). RED (See guidance)
Z
14.4
Total unfactored
column load (kN)2108
All Weather Fashions
52 Shahid Tajuddin Ahmed Sarani
Mohakhali, Dhaka 1213
before 2005
0.152
2.896
Due to the RED warning, the live loads have
been further reduced to a minimum of 1.0kPa.
Although actual live loads may be less than
1.0kPa, it is unsafe to assume any design
loading less than 1.0kPa. Following this, the
result remains RED.
Given that this building has been approved for
construction up to 13 floors, the structure in its
current state already appears to be insufficient
for its given purpose.
1st Priority 1 Concern
Column Load Remains
Unsatisfactory When Assuming
Actual Applied Loads
Each roll of fabric is
estimated to be
approximately 35kg.
As they are stacked
10 rolls high, and
arranged 6 rolls per
layer, the weight of
each layer is approx
210kg, resulting in a
total weight of
2,100kg (20.6kN) per
stack.
Based on a plan area
of 1.4mx1.4m per
stack, the equivalent
live load per stack is
estimated to be:
20.6kN/(1.4x1.4)m2 =
10.5kPa.
The allowable live
load is max. 3.0kPa
2nd Priority 1 Concern
Excessive Storage Height of
Fabric storage area on Level 3
Each roll of fabric is
estimated to be
approximately 30kg.
As they are stacked
7 rolls high, and
arranged 7 rolls per
layer, the weight of
each layer is approx
210kg, resulting in a
total weight of
1,470kg (14.4kN) per
stack.
Based on a plan area
of 1.4mx1.4m per
stack, the equivalent
live load per stack is
estimated to be:
14.4kN/(1.4x1.4)m2 =
7.4kPa.
The allowable live
load is max. 3.0kPa
3rd Priority 1 Concern
Excessive Storage Height of
Fabric storage area on Level 6
Identified Priority 3 Concerns
1st Priority 3 Concern
In the main circulation stairwell, the existing vent shaft had been
cancelled, and modification to the staircase had taken place by filling
in the half-landing slab to the perimeter of the building. However, the
construction quality is very poor, and spalling of the slab has
occurred, including rusting of the rebars, and also the deep cracking
of the column at 8/F and 7/F half landing.
It is planned to construct brick wall to enclose the entire staircase.
Along the original slab edge.
Main Staircase structural
modifications exhibit major defects
2nd Priority 3 Concern
In particular on the 8/F ceiling (the roof slab), there are many areas
where water seepage or prolonged soaking of the slab has caused
water damage either by rebar corrosion, leading to spalling or
loosening of plaster. Other areas, such as the ceiling below the toilets
at the very rear of the building on each floor also exhibits water
damage (6/F). On some floors, walls also have water damage (4/F).
This should be repaired
Dampness and water ingress has caused
water damage at several locations
3rd Priority 3 Concern
Judging by the water ingress
at 8/F ceiling, it may be
assumed that no waterproof
membrane has been applied
at the roof level of the building.
This means that any cracks in
the surface finishes on the roof
will allow water to seep into
the concrete slab beneath the
finishes, and cause long-term
soaking of the slab, causing
the defects as observed on 8/F
ceiling.
Roof Floor does not appear to have any
waterproof membrane to protect lower floor
from water damage
Priority Actions
Problems Observed Summary
ITEM 1: (1st Priority 1) Preliminary load take-down calculations suggest that structure does not comply with the BNBC regulations with regard to required design loading, and that even using significantly reduced loading still results in a structure which is incapable of sustaining the applied loads. ITEM 2: (2nd and 3rd Priority 1) Storage height of fabric in storage rooms on 3/F and 6/F appear to be excessive ITEM 3: (1st Priority 3) Poor quality construction at entire main stairwell location has resulted in cracking of columns, spalling of concrete, and corrosion of rebars. ITEM 4: (2nd Priority 3) Several areas at 4/F, 6/F and 8/F have significant water damage at wall and ceiling and beam locations. ITEM 5: (3rd Priority 3) Roof appears not to have any waterproofing system applied.
Priority 1
(Immediate – Now)
• Suspend all activities in the building
• Discuss with owner on the possibility of
shutting down at least 4 (four) floors of the
building to reduce loading to within limits
Item 1 and actions Preliminary load take-down calculations suggest that structure does not comply with the BNBC
regulations with regard to required design loading and that even using significantly reduced loading
still results in a structure which is incapable of sustaining the applied loads.
Priority 2
(within 6 – weeks)
• Building engineer to carry out thorough load
checking of the entire structure, including
slabs, beams and columns based on BNBC
• Carry out intrusive testing of structure to
determine actual concrete and rebar strength
Priority 3
(within 6-months)
• Develop live load plans for each usable floor
and incorporate fail safe indication system
• Consider whether to demolish the unused
floors
Item 2 and actions
Storage height of fabric in storage rooms on 3/F and 6/F appear to be excessive
Priority 1
(Immediate – Now)
• Immediately reduce stacking height of fabric
rolls to ensure total load does not exceed
3.0kPa
Priority 2
(within 6 – weeks)
• Mark the maximum allowable height of fabric
stacking to ensure full compliance
Priority 3
(within 6-months)
• Not required
Item 3 and actions
Poor quality construction at entire main stairwell location has resulted in cracking of columns,
spalling of concrete, and corrosion of rebars.
Priority 1
(Immediate – Now)
• Carry out full building survey to identify all
areas of concrete damage, and mark on site
with coloured spray paint
Priority 2
(within 6 – weeks)
• Provide propping to the damaged concrete
areas (if slab and beam and column)
Priority 3
(within 6-months)
• Hack away the damaged concrete and
expose reinforcement to check for corrosion
• Carry out replacement of reinforcement and
proper regrouting of structural elements
Item 4 and actions
Several areas at 4/F, 6/F and 8/F have significant water damage at wall and ceiling and beam
locations.
Priority 1
(Immediate – Now)
• Not required if done as part of Item 3
Priority 2
(within 6 – weeks)
• Provide propping to the damaged concrete
areas (if slab and beam and column)
Priority 3
(within 6-months)
• Hack away the damaged concrete and
expose reinforcement to check for corrosion
• Carry out replacement of reinforcement and
proper regrouting of structural elements
Item 5 and actions
Roof appears not to have any waterproofing system applied.
Priority 1
(Immediate – Now)
• Not required
Priority 2
(within 6 – weeks)
• Not required
Priority 3
(within 6-months)
• Consider removing existing screed, applying
a new waterproofing membrane and
reapplying the screed
Detail Engineering Assessment
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. This
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
Guidance 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 materials strengths and reinforcement content in all key elements studied.
5. Detailed load plans shall be prepared for each level showing current ad 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 variations between As-built compared to the design structure
• Result of testing for strength and materials
• Results of geotechnical assessment and testing/investigation
• Details of loading, inputs and results of computer modelling
• Commentary on adequate/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
Survey Limitations and Assumptions
This report is for the private and confidential use of Accord for whom it was prepared together with their professional advisors as
appropriate. It should not be reproduced in whole or in part or relied upon by third parties for any use without the express written permission
of WSP.
This report can be used in discussion with the supplier or factory owner as a means to rectify or address any observations made. The report
is not comprehensive and is limited to what could be observed during a visual inspection of the building.
This report is not intended to be treated as a generalised inspection and does not cover the deterioration of structural members through
dampness, fungal or insect attack, nor does it deal with problems and defects of non-structural nature. Other non structural aspects of the
building such as fire safety have not been assessed in this survey.
Except as otherwise noted, drains and other services were not viewed or tested during our inspection and are therefore similarly excluded
from this report. We have not inspected any parts of the structure which are covered, unexposed or inaccessible and we are therefore
unable to report that any such part of the property is free from defect.
External inspection of the façade walls has generally been carried out from ground level only by visual sighting. No opening up works were
carried out (except as noted) and we rely on the Architects and Engineers drawings provided to use for our views on concealed parts of the
structure and in particular foundations. Strengths of materials and components are untested and we recommend that the factory owners
Building Engineer carries out insitu testing over and above those suggested to satisfy themselves with the material strengths and component
details.
Recommendations, where given, are for the purpose of providing indicative advice only, are not exhaustive, relate solely to identifying key
and obvious structural defects as identified in this presentation, and do not take the form of or constitute a specification for works. We take
no responsibility for the works as constructed. This report does not interfere with the factory owners Building Engineers responsibility for the
structural performance of this building. The Building Engineer remains fully responsible for the structural adequacy of the building.
This report does not comment in detail on the future seismic performance of the building and only highlights the fact that the building may
experience significant damage or collapse in a seismic event along with many others in the Dhaka region.
The observations in this report are based on the Engineering Judgement of the lead surveyor/engineer at the time of the survey. We assume
in making these observations that no covering up of faults defects, filling or plastering over cracking or significant repair work has been
carried out by the building owner. Any future alterations or additional work by the building owner will void this report.