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Construction
of steel – shelf
ABSTRACT
The steel-shelf was constructed at the
mechanical Engineering workshop of the Institute.
The first step taken in the fabrication
of the shelf was the selection of the material suitable for the construction;
mild steel was chosen.
The construction has the following
steps: drawing and dimensioning of the proposed steel – shelf, market surveying
and procurement of the needed materials, marketing out and cutting of the
material, welding, filling, and finally painting to prevent corrosion.
The dimension of the steel – shelf are:
1219.2mm height, 939.8mm width and
457.2mm breadth.
The purpose is to produce a steel shelf
that will be economically cheap and can meet up to the standard in the market.
TABLE OF CONTENTS
CHAPTER ONE
INTRODUCTION
CHAPTER TWO
2.0
Literature review
2.1
History of the
steel-shelf
2.2
Types of shelve
7
2.3
The design of shelf
2.4
Steel making
2.5
Comparism of wood and steel
2.6
Material of construction
2.7
Corrosion
2.8
Prevention of
corrosion
2.9
Maintenance of shelf
CHAPTER THREE
3.1
Construction procedure
3.2
Description of the modern steel-shelf
3.3
Safety precaution
3.4
Observations
CHAPTER FOUR
4.1
Cost analysis
4.2
Discussion
4.3
Recommendation
4.4
Conclusion
References
CHAPTER ONE
INTRODUCTION
A steel shelf is a set of shelves made
of steel with compartments and partitions where books or files and other
reference materials are kept in the libraries. It can be used to store
chemicals and other laboratory equipments or apparatues in the
laboratories. It can also be used to store other valuable materials at
home and industries. When used in libraries for packing books it is
called book shelf but if it is used in industries to store materials it is
referred to as facility for storage.
A shelf can be made of wood, glass or
metal (steel). It could be dismountable or undismountable. In
consideration of some factors, we decided to design and fabricate an
unddismountable steel shelf. This undismountable steel-shelf has a longer
life span and serve its purpose better than any other shelf.
Being undismountable, there will be no
lose of parts as in dismountable ones. Also, steel as a material of
construction has advantage over wood which can be attached by termits; and
glass which can easily be broken.
Though corrosion as a result of
reaction of air (oxygen), moisture and chemicals do attack the surface of
metals, painting of the steel was done in order to reduce or eliminate this
problems of corrosion. Considering the availability durability, quality
and affordability of this steels, research or the engineering properties of the
material was carried out. Steel as a material of construction is the
cheapest, the most common and the most versatile metal used in industries all
over the world. It can be cast; drawn, hot or cold; rolled; pressed,
welded etc.
There are many grades of carbon steel
which includes: low. Carbon steel (mild steel) that contains. (0.1 – 0.3)% of
carbon. It is of two types Black-mild steel and Bright-mild steel.
Another is medium carbon steel which contain (0.3 – 0.7)% of carbon and High
Carbon steel that contain (0.7 – 1.5)% of carbon.
In our project, low carbon steel or
wild steel was used because it is used for general Engineering purpose.
It has limited corrosion resistance, should not be used with dilute acids like
sulphuric acid of less than 90% concentration. Even for concentration
above 90%, the use of steel is still imited to certain ranges of temperature
defined in accordance with the chemicals in contact with the steel. It
does not all with stand hydrochoric, phosphoric or nitric acids irrespective of
the level of temperature and concentration.
It can be used to store organic
solvents and other similar chemicals. It is non-hazardsous and resists
termites. This is the area in which cost of production was made by
adopting some amendments with the aim of achieving the modern steel-shelf of a
standard size.
Furthermore, to produce a quality and
long lasting steel-shelf, the vartous parts were arranged and shaped, connected
in such a way that it affords an efficient and economical solution to the
construction problems. The shelf was also fitted with rollers stands and
stoppers for stability at any given point. It was solidly welded for easy
movement. Infact, the steel-shelf was constructed to the teste of
maintenance and durability.
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