2.0   PHYSICAL INSPECTION:

The Consultant visited all floors of the building and inspected the physical condition of both structural members (columns, beams, floor slabs etc.) and non-structural members (brick partition walls etc). The following observations are put forward. 

(i)                 No visible crack in the any structural or non structural part of the building.

(ii)              No visible damp at slab or any component of the building.

3.0  SCOPE OF WORK

The scope of work is to evaluate the structural and foundation capacity of the existing building. The safety assessment of the building for maximum loading combinations that it is likely to experience during its lifetime requires comprehensive investigation involving detailed structural analysis based on design strength. Checking of different structural members will be done on the basis of actual strength of concrete and steel used in construction (from test reports).

 The major scope of the work is to check the safety and stability of different structural members, like

     a)      Checking for the top deflection of the structure

     b)      Adequacy of the shallow foundation.

c)      Adequacy of the column sizes and reinforcement.

d)      Checking the design of other structural members. 

For lack of building existing structural drawing Non Descructive Testing (NDT) for rebar detection and concrete strength assessment have been performed.

4.0     WORK METHODOLOGY                                                                                

 Based on the supplied architectural drawing, The Civil and Structures (TCS) independently developed a computer analysis model and visited the site and then and carried out complete analysis of the structure incorporating various design requirements as per Bangladesh National Building Code (BNBC). Loading values, Load combination, design parameters, strength calculation are of the major findings from the Code. The results obtained from computer model are checked against relevant specifications and hand calculations. Finally, based on the analytical results structural and foundation safety and stability are recommended.

5.0    STRUCTURAL DESIGN CONCEPT & CRITERIA.

The structural element of the complex has been designed and considering the following criteria.

5.1    Codes and Standard:

 Bangladesh national Building Code - 1993 (BNBC)

American Concrete Institute (ACI 318-99)

American Society for Testing Materials (ASTM)

5.2    Loads considered for each floor:

 For checking the structure the live load assumed for each floor 40psf, floor finish 25 psf and minimum partition wall 70 psf.

5.3    Materials considered in design and used in construction 

Rebar strength has been considered as 40ksi and concrete strength has been checked with rebound hammer and noted in the drawing. Column, Beam and Slab concrete strength ha sbeen found 2.92ksi.