FABRICATION OF METAL SHELF

CHAPTER ONE

INTRODUCTION

1.1 Background to Study

A bookshelf is a device with partitions use for the purpose of save-guarding books and files in offices, libraries and at homes. A bookshelf can be wooden, metal or glass. They could also be design in such a way that they could be dismountable or undismountable. In our project, we decided to design and fabricate on undismountable metallic bookshelf. Among all the bookshelfs, the undismountable metallic bookshelf has the longest lift span because of its rigidity, quantity of material and it ability to with stand heavy loads. In other words, the constant loosening and coupling of the component parts which lead to the weakness of the bolt and nut, thus subject the shelf to vibration. Our project being the undismountable bookshelf was fabricated with variety of material. The types of materials involved are mild steel square pipes (25mm x 25mm) mild steel sheet metal, etc. in this, the square pipes were used in the fabrication of the frame work The essence of creating steel fame work with pipes is for it to withstand the stress that will be develop due to the weight of the material and loads or each partition. In fabrication, the frame was first erected before covering with the mild steel sheet. The mass and volume of the book to be contained by each partition were considered before they were erected, so certain experiment were carried out which will be discusses in detail in this report.

1.2 Description of the Metal Book Shelf

The metal bookshelf is made up of the following parts and components.

(i) The frame work

(ii) The side

(iii) The top

(iv) The stand

(v) The partitions

THE FRAME

The frame is the skeleton of the whole shelf, it is made of 25mm square pipe and 25mm (1) by 50mm (2) rectangle pipe. The frame was first erected together by mean of welding before the sheet was covered at the back, side, top and the partitions. The frame was design to withstand the stress that will be develop on it due to the weight of sheet metal and load on each partition.

THE SIDE

The side is made up of a mild steel of 0.8mm thick with height 1700mm and width 700mm. It was welded to the frame (at an angle 900).

THE TOP OR PLANE

The top is made up of a mild steel sheet of thickness 0.8mm and 1700mm height by 600mm width and it is also welded diagonally to the frame. (I.e. at angle 900)

THE STAND

The stand was made from a rectangle pipe and a square pipe, that is, the two back stand were made from square pipe while the two front stands were made from the square pipe. This stand were extended from the frame work to enable stronger gripe, avoid bending, breaking and also to avoid slip.

THE PARTRITIONS

The partitions were design to be able to contain large number of books. They are measured 360mm by height, 1222mm by length and 470mm by breath. The material used for the partitions was mild steel plate of 1.2mm thick was welded to the frame work of the partitions. The volume of the partition = l x b x h = 1222 x 470 x 360 = 206762400mm

AREA OF PARTITION = 2(lb + bh + lh) = 2(1222 x 470) + (470 x 360) + (1222 x 360) =2(574340)+ (169200) + (439920) =2(1183460) = 2366920mm.

1.3 Purpose of the Project

The purpose of this project is to design and construct a metallic bookshelf capable of containing different standard, size books. The design should be able to complete favourably with other accepted standard.

1.4 Scope and Limitation of the Study

The shelf is of four (4) partitions constructed with metal which is the best material for the construction of engineering device of this type and in each partition distance the distance =410mm which bring it to the total of 16inches.

A metallic lockable bookshelf is a rectangular piece metal device and fabricated for the main purpose of artery keeping of book, files audio and vides cassette in homes, offices and libraries etc. as well as retrieval and consultation when needed.
On starting of this project a lot of consideration was done based on the workability of such project, the consideration of material available as well as they choice of the advantages of the material later stetted including research on the regimen properties of the material with at most carefulness if such material chosed is combustible, environmental finally or Harvard an resistance to insects attack like metals instead f wood. Strenuous become the consideration to make the project quite affordable, this in the area of cost of production which was over comer by adopting certain amendment with the need to achieving the shelf in such a way that it become a modern lockable bookshelf which can contain quite number of books and files. It was felted with rollers stands and stoppers for stability at any kept point and easy movement and solidity welded