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SHEET  LAYOUT
Figure 3-17.-Example of vertical title block prepared by NAVFACENGCOM.

Engineering Aid 3 - Beginning Structural engineering guide book
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lines)   and   the   location   of   the   horizontal borderlines  are  marked  off  on  the  vertical  trim lines.   Dimensions   may   be   scaled   along   the borderlines. After  the  drawing  is  completed,  borderlines are given the required weight. After the completed drawing has been removed from the board, it is cut  to  its  finished  size  along  the  trim  line.  If blueprints  are  to  be  made  on  paper  that  is  not precut  to  the  standard  drawing  size,  you  may  find it necessary to leave an extra margin outside the trim lines. By leaving an extra margin, you can darken the trim lines. The darkened trim lines, when  reproduced,  will  provide  a  visible  line  for trimming  the  blueprints  to  size.  The  extra  margin will  also  help  protect  the  drawing  when  it  is repeatedly  handled  or  attached  to  the  drawing board  later  for  revisions. BASIC  FORMAT The following discussion deals with the basic drafting  format.  By  basic  format,  we  mean  the title  block,  revision  block,  list  of  materials, and  other  information  that  must  be  placed  on applicable   size   drafting   sheets.   Although   you may  find  slight  variations  on  local-command- prepared  drawings,  the  basic  format  specified in  MIL-HDBK-1006/1  is  required  on  all  NAV- FACENGCOM  drawings. Title Block The primary purpose of a drawing title block is  to  identify  a  drawing.  Title  blocks  must  be uniform  in  size  and  easy  to  read.  They  may  be mechanically  lettered,  neatly  lettered  freehand,  or preprinted  commercially  on  standard  size  drafting sheets. Generally, the title block is placed in the lower right-hand  corner  of  the  drawing  sheet,  regardless of  the  size  of  the  drawing  (except  for  vertical title block). There are three sizes of title blocks: a block used for A-, B-, C-, and G-size drawings (fig.  3-15),  a  slightly  larger  block  for  D-,  E-,  F-, H-,  J-,  and  K-size  drawings  (fig.  3-16),  and  a Figure 3-16.-Preparing title block for D-, E-, F-, H-, J-, and K-size drawings. 3-13







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