interpreting engineering drawings: title and revision blocks>
title block. the name address and logo of the company are usually located in the
upper area of the title block.
notice many companies include a confidentiality statement either in the
title block or in another location within the drawing.
Drawing Title: The drawing title should be descriptive, brief, and clearly state
an identification of the parts or assembly.
job number. the job number is used to designate the total set of drawings.
drawing number. the drawing number is used to identify and control the print.
this set of coded numbers is specific to company standards.
branch. the branch number is used to designate the department or group.
revision block 1. changes made to the drawings after the date of issue. this
rectangle of information shows the first revision made to this drawing.
revision block 2. this rectangle of information shows the second revision
made to this drawing.
revision block 3. this rectangle of information shows the third revision
made to this drawing.
revision block 4. this rectangle of information shows the fourth revision
made to this drawing.
third-angle projection. the third-angle projection displays the top drawing view
above the front drawing view. it's used in the United States and Canada.
CAD number. the CAD drawing number is used by many companies to organize CAD
drawings within the engineering drawing database.
material area. the materials area in the title block signifies the material used
to make the part.
scale. the scale is the ratio between the part as drawn and the actual part
dwn this dwn area shows the initials of the drafter who created the drawing and
the completion date.
Chk'd. Chk'd stands for after the drawing it is checked for accuracy and
completeness initials and date are entered here.
approved. after all errors have been corrected and the drawing is ready to be
used for fabrication, the supervising engineer enters their initials and date
in the title block.
issued. the date indicates that this drawing is official and can be sent to
the customers for their approval or to the manufacturing floor for fabrication.
quantity requested. this box with the number indicates the number of times
this drawing will be fabricated.
current job number. although this information is contained in the main
title block this area may be used as a quick reference when ordering supplies
for a project.
wait. this value may be used for safety issues or shipping weight calculations.
finish. if the part requires a specific finish such as Chrome or nickel plating
as noted may be entered here. specific information would then be found in a
notebook or in a call-out elsewhere in the dry.
this completes interpreting engineering drawings title and revision blocks.