ABSTRACT
The aim of
this project was to construct a steel cupboard in order to help us acquire the
knowledge of fabrication of a modern cupboard and the essence of it. Also to
enable us (the students of chemical Engineering) to know how to construct as
future engineers.
The
construction of steel cupboard was done using a square pipe of 1.5mm thickness
and the mild steel having a thickness of 1.5mm. it was mark out cut, welded,
filled and painted. The cupboard has
length and height of 1150mm and 1160mm and dept 400mm. A grade of 12 electrode was
used for the welding process.
The
material used was locally sourced and selected to suit the desired purpose.
Mild steel was used due to it’s cost and it’s corrosion free nature. No problem
was encounter as regard the construction work. As a result of the quality of
the material and it’s properties, a guarantee of ten years is given to the
construction work. Advantage of steel cupboard as in preserving and securing of
laboratory chemicals and equipment, keeping of document in offices out ways
it’s disadvantage. The cost of production of the steel cupboard was fifteen
thousand naira.
CHAPTER ONE
INTRODUCTION
A Cupboard
is a set of shelves with doors, either built into a room, offices or industries
as a fixed or separate piece of furniture used for dishes, provisions,
clothing, book shelves etc. the one in which clothes are hung is called
hangers. These cupboard used in the libraries and offices for packing book are
called book shelves. In the industries, material are stored in cupboard refer
to as facility for storage.
The
material selection for the construction of any cupboard strongly depends on the
properties and purpose the cupboard will serve. Generally, considering all the
materials and non-metals have their individual merits. But point to comparison
between them will definitely show that in general materials have a lot of
advantages over metals.
For
example, while many type of metals are suitable for high temperature operation,
non steel such as wood and glass are
suitable for lower and limited range of temperature. Metals posses a wider
range of chemical stability than non-metals, so it can be said that the obvious
advantage of first cost cheapness of non-metallic materials is counseled by
other disadvantages of non-0metals, the most glarily of which is the that of
narrow applicability. When considering the cost also, the first cost material
is even not taken as sufficient indication or which to base the selection of
construction materials. The following cost factors among others must be
considered. Fabrication cost, installation costs, maintenance costs and cost of
replacement. These cost must be considered in the material selection for
construction.
Cupboard
derive it name and purpose sometimes from the material of construction and
also the shape it takes. Since cupboard
built in homes of woods, usually used for hanging clothes, serve the purpose of
protecting clothes for dust and other things and so on, they are called
hangers. In the offices, books are arranged in a chronological order, files are
also arranged inside cupboard for the necessary documents of the institution.
Such cupboard are normally refers to as book shelves. This is usually made of
metals. Cupboards used for domestic purposes such as keeping of dishes and
provisions are usually of wood, and in this case, there is no observation of
the operation involved in the construction of metal cupboard. This is because
of the soft mnature in the curly off of the excess of the wood during
construction. Instead the use of welding, nail is used in the arrangement of
different part of cupboard. Another major different better those cupboard made
of wood and those made of metal is that wooden cupboard cannot protect the
inside in the presence of fire outbreak without getting burnt. But the metal
cupboard can protect the things inside it in the presence of fire.
There are
several types of metals that can be used for construction. Metals for
construction include: Gold, Silver, Bronze and Aluminum, Iron, and steel. There
are usually about three types of steel as it constitute the widest use metal.
These types include low carbon steel that has about 0.3% carbon, medium carbon
steel, that about 0.3% - 0.7% carbon, and high carbon steel that contain 0.7%
to 1.7% carbon.
Steel are
used in the construction of metal cupboard, because it is soft to cutting,
bending and several operations applied to the metal during construction. The
galvanized type of steel has a nature of stainless steel and so does not support rust. Because of this, it is
not painted after using it for construction. In the fabrication of sheet of
metals, several types of guage are produced. They include Guage 23, guage 20,
18,16, 20, then guage 18, gauge 16, gauge 14 and gauge 12 and 10, 20 has the
least thickness, will gauge 10 has the highest thickness. Gauge 18 and gauge 16 are the best type for
construction of metal cupboards.
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