All Weather Fashions Ltd 52, Shahid Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1213, Bangladesh

(+23.774852N, 90.398619E)

3rd March 2014

1

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