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Satisfactory To Block
Use  of  line  characteristics  and  conventions

Engineering Aid 3 - Beginning Structural engineering guide book
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Figure 3-22.-Format used in preparing revision blocks. sizes  of  the  blocks  differ  (fig.  3-22).  Revision A  brief  description  of  each  change  is information is entered chronologically starting at the  top  of  the  revision  block. Revision letters are used to identify a change or  revision  to  a  drawing.  Uppercase  letters  are used  in  alphabetical  sequence,  omitting  the letters  I, O, Q, S, X, and Z. The  first  revision  to a  drawing  is  assigned  the  A. On  a  drawing,  all changes  that  are  incorporated  at  one  time  are identified by the same revision letter. The changes may  be  numbered  sequentially  to  permit  ready identification  of  a  specific  change.  In  this  case, the  appropriate  serial  number  will  appear  as  a suffix to the revision letter (for example, A1, A2, A3,  etc.).  Whenever  possible  the  revision  letter will  be  placed  near  the  actual  change  on  the drawing.  It  should  be  placed  so  it  is  not confused  with  other  symbols  on  the  drawing. Usually, the revision letter is placed inside of a circle   or   triangle                        If   a   circle   or   tri- angle is used on the drawing, it should also be used in  the  revision  block. made   in   the   description   column,   adjacent to  its  revision  letter,  in  the  revision  block. The   approval   signature   and   date   of   revision are  also  entered  in  the  appropriate  columns. For all drawings prepared by Architect/Engineer (A/E)  firms,  the  revision  block  should  include a  separate  PREPARED  BY  column  (fig.  3-22, view  B). The  zone  column  on  the  standard  revision block   is   normally   omitted   on   construction drawings  but  may  be  used  in  reviewing  maps. Zones are indicated by alphabetical or numerical entries and are evenly spaced in the margin for locating  an  object  on  the  drawing  or  map.  Use of  zoning  is  described  in  DoD-STD-100C. Like title blocks, revision blocks may vary with each command, and you will be required to follow command  guidelines.  The  procedure  for  making revisions  to  drawings  is  covered  in  DoD-STD- 100C. 3-18







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