-
Strategies For Controlling Cracks In Residential Buildings
CHAPTER ONE -- [Total Page(s) 2]
Page 1 of 2
-
-
-
CHAPTER ONE
INTRODUCTION
1.1 Background of the study
Modern
building of engineering structure are complex and require Architect,
structural engineers, quantity surveyor, good contractor and supervisors
for detailed planning, safe design and efficient use of appropriate
material. When these requirement are not made adequately, failure
becomes more probable? According to Evelyn (September – 2004) cracks in
building elements may constitute a defect in a variety of ways. In many
cases a particular crack occurrence may result in more than one type of
defect. A serviceability defect and an appearance defect. And according
to Shri M.M Goyal (2004) occurrence of various crack patterns in the
building during construction and after completion, when it is subjected
to super imposed loads and during service life, is a common phenomenon. A
building component develops cracks whenever the stress in the
components exceeds its strength. Stress in the building components
caused by external applied forces, such as dead, live, wind or seismic
leads, foundation settlement e.tc or it could be induced internally due
to thermal movements, moisture changes, elastic deformation, chemical
action e.t.c
The occupants of buildings may served as good tenants or
occupants, Since their knowledge of the facility in many ways have
contributed in checking failure and defects in residential buildings. It
is important for the tenants to understand the causes of cracks in
structures e.g.
Non structural cracks – these are mostly due to
internally induced stresses in building material and do not endanger
safety of a building but may look unsightly. Or may create an impression
of faulty work or may site a feeling of insatiability. In some
situation due to penetration of moisture through them, non structural
cracks may spoil the internal finishes thus adding to the cost of
maintenance or corrode the reinforcement, thereby adversely affecting
the stability of the structure in long run, e.g vertical crack in a long
compound wall due to shrinkage or thermal movement.
Cracks may
appreciably vary in width from very thin hair crack barely visible to
naked eye to sapling crack. Depending upon the crack width cracks are
classified as: thin crack – less than 1 mm in width, medium crack- 1 to
2mm in width, wide crack – more than 2mm in width and crazing –
occurrence of closely spaced line cracks at the surface of a structure
or material.
The cracks that occur are of uniform width some are
narrow at one end gradually widening at the other, the above pattern of
cracks usually occur on the surface of plaster or rendering of the
structure of building, and those patterns some occur on the walls of the
building such as; straight, toothed, stepped or map pattern. The random
type crack may be vertically or horizontally or diagonally e.t.c
Therefore,
there is need for the occupants of the residential buildings to
periodically examine and critically assess the stability and ability of
the structure of their buildings.
CHAPTER ONE -- [Total Page(s) 2]
Page 1 of 2
-
-
ABSRACT - [ Total Page(s): 1 ]The study was designed to find out strategies for controlling cracks in residential building, in Niger south senatorial district. Among the specific purposes of the study were determining the availability to facilities for controlling cracks in residential building, determine the methods of detecting cracks in residential building, and determining the availability of personnel for detecting cracks in residential building and also the strategies adopted to improve the control of cracks in residen ... Continue reading---
