Some examples are contract numbers and drawing scale. Other information may also be contained in the title block and will vary from site to site and vendor to vendor. The reference block can be extremely helpful in tracing down additional information on the system or component. Lines are used for many other purposes, however, and the ability to recognize the type and purpose of a line in a drawing is the first step in becoming a good blueprint reader. The most obvious reason for a line appearing in a drawing is to define the shape of an object. Most mechanical engineering drawing will have a reference block, which lists other drawings that are related to the system/component, or it can list all the other drawings that are cross-referenced on the drawing, depending on the site's or vendor's conventions. Some of the tools required to make your own blueprint are architect’s scale, pencils/pens, T-square, tracing paper, masking tape, flat working surface, compass, ruler and eraser. designated purpose in the language of blueprints. These names can also help in the resolution of a discrepancy between the drawing and another source of information. This information can be invaluable in locating further data on the system/component design or operation. Other areas of the title block normally contains the signatures and approval dates, which provide information as to when and by whom the component/system was designed and when and by whom the drawing was drafted and verified for final approval. A construction plan is a collection of two-dimensional drawings (blueprints) that show what will be built and what it will look like. This box contains various information such as the title of the drawing, scale, the logo or information about the company and people associated, the project which includes name, address, and date. Drawings are usually filed by their drawing number because the drawing title may be common to several prints or series of prints. The architecture title block is a rectangular box usually present either at the bottom or on the right-hand side of a drawing sheet. The drawing number may also contain information such as the sheet number, if the drawing is part of a series, or it may contain the revision level. Usually the number is unique to the drawing and is comprised of a code that contains information about the drawing such as the site, system, and type of drawing. The drawing title and the drawing number are used for identification and filing purposes. On of the areas normally found within the title block are the drawing title, the drawing number, and lists the location, the site, or the vendor. A title block is divided into several areas. The title block of a drawing, usually located on the bottom or lower right hand corner, contains all the information necessary to identify the drawing and to verify its validity.
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