Transcript Document

Module 2, Office Layout
THE DRAWING OFFICE
The Functions of a Drawing Office
The size and structure of a drawing office will vary depending on the size of the organization or company and the nature
of its business activities. However, there are specific functions, processes and activities common to all drawing offices
regardless of how big or small they may be.
The main functions of a typical drawing office are to:
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prepare design layouts and production drawings for its clients
•
perform a variety of calculations in order to ensure that the various components that are to be manufactured or
structures that are to be erected will be strong enough to withstand the forces that they will be exposed to
•
select suitable materials and appropriate manufacturing methods to be used
•
provide estimates of the bills of materials required and overall cost of manufacture or construction and erection
•
store all drawings, supporting technical data/information and reference material
•
provide technical services and liaison both internally and externally
The Layout of a Drawing Office
The overall space requirement for a drawing office will naturally depend on the
total number of personnel to be accommodated as well as the equipment and
machines they use, office furniture requirements, and space required for the
storage of materials, finished drawings and supporting documentation.
The layout of the drawing office is critical to ensuring optimum use of the
available space to provide a comfortable and safe work environment that will
maximize the efficiency and the quality of the work being done.
The provision of adequate ventilation and appropriate lighting levels, as well as
electrical power requirements must also all be taken into consideration.
The Layout of a Drawing Office - workstations
THE DRAWING OFFICE
Filing and Cataloguing of Drawings
Every engineering drawing must contain a title block which must, at the very
least, contain an appropriately descriptive title and a unique drawing number.
In order to maintain effective control, it is imperative that additional information
pertaining to the drawing also be included:
• the name of the draughtsman
• the date on which it was completed
• the name of the individual who checked it
• a revised drawing number should the original drawing be changed
• the respective dates and details of any revisions
A drawing register must be maintained which contains the details of every single
drawing produced and where it is filed or to whom it has been issued.
Management of Superseded Drawings
When a revision is made to a drawing, the earlier version becomes redundant or
obsolete, and even though it is no longer to be used it forms an important part
of the historical record, and therefore should be retained. After a notation
clearly indicating that it has been superseded has been affixed, it should be filed
in an archive separate from any “active” drawings.
It is also advisable to retain a register of any copies of drawings that have been
issued so that all copies of those drawings that are superseded can be removed
from circulation and replaced with copies of the updated version.
The Layout of a Drawing Office - drafting equipment
The Layout of a Drawing Office - storage
The Layout of a Drawing Office - storage
The Layout of a Drawing Office - copying
Maintenance of Drawing Office Equipment
All drawing office machines and equipment must be maintained in good working
order and regularly cleaned.
All drawing and measuring instruments must be securely stored when not in use
to protect them from inadvertent and unnecessary damage.
Drawing Office Materials
Engineering drawings are produced using both graphite pencils of varying
hardness and thickness and pens of varying nib thickness containing suitable ink,
on a variety of media such as paper, cloth (linen), and polyester film.
The nature of the drawing and its intended purpose will usually be considered
when selecting the media that will be used.
Copying and Reproduction of Drawings
For obvious reasons, the original drawings produced by any drawing office should never be issued to the factory floor,
workshop or construction site. Only copies of original drawings should ever be issued for the facilitation of manufacture
or construction.
Duplicates of original drawings should also always be available should the original drawings be lost or damaged by fire or
other disaster.
Various methods of reproduction are used and include:
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photocopying
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electrostatic processes
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diazo copying
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photographic copying
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microfilming
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thermographic reproduction
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blueprints
THE CAD DRAWING OFFICE
MODERN TECHNOLOGY IN A DRAWING
OFFICE
Computer Graphics (CAD) scanning:
INPUT
Scanned paper
PROCESS
Computer storage and
processing of scanned
data
OUTPUT
Plotted paper
MODERN TECHNOLOGY IN A DRAWING
OFFICE
Class work:
• How does a scanner work?
• What determines the resolution of scanned data?
Thank You
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