CONCEPTUAL  DEFINITIVE  DESIGNS These  are  prepared  designs  or  drawings defining   various   functional,   engineering,   and logistical  requirements  for  structures  and  facilities needed on a repetitive basis. These drawings are intended to provide a uniform basis for planning and design. CONCEPTUAL DESIGNS commonly used  in  the  Navy  include  both  definitive  and standard designs. Definitive  Designs DEFINITIVE   DESIGNS   are   drawings   of typical buildings and structures you will find in NAVFAC  P-272,   Definitive   Designs   for   Naval Shore Facilities, Part 1.  These  drawings  contain floor  plan  arrangements,  building  sections  and elevations,  and  utility  requirements  for  general guidance to A/E contractors or in-house staff who prepare  project  drawings  and  specifications. Part 2 of P-272 contains advance designs of more complex  facilities  that  may  include  equipment layouts,  piping  diagrams,  electrical  schematics, and   other   critical   requirements   for   specific guidance  in  preparing  project  designs.  Both  parts, however,   are   used   in   conjunction   with   NAV- FACENGCOM criteria manuals, handbooks, and guide  specifications  listed  in  P-34,  Engineering and  Design  Criteria  for  Navy  Facilities. Included  in  the  facility  type  of  designs  are single-line   schematics,   bubble   diagrams,   or graphics   based   on   definitive   drawings   called FACILITY PLATES. These plates (fig. 10-1) are used to show functional relationships or building layouts, such as detailed information concerning the  design  of  individual  rooms  within  a  specific type  of  facility.  Facility  plates  may  show  the location of all of the equipment and furnishings within a room, the location of utilities serving the room,  the  location  and  size  of  doors  and  windows, a  ceiling  plan  reflecting  the  location  of  lighting fixtures, and other technical design information about the room. Facility plates are used instead of   the   definitive   design   whenever   the   plates effectively  convey  the  necessary  design  data  or whenever definitive are scheduled to be revised, developed, or validated. You will find most of the facility plates within the pages of criteria or design manuals  (DMs). Standard  Designs These designs are detailed working drawings of  predominantly  specialized  structures  for  unique naval  facilities,  such  as  waterfront  structures, aircraft  operations  and  maintenance  facilities, ammunition  storage  facilities,  and  fleet  moorings. STANDARD  DESIGNS  form  a  part  of  the  con- struction documents requiring only supplemental drawings for adapting the facility to the specific site.  You  can  modify  these  drawings  (except  for ammunition  facilities)  as  necessary  to  meet on-site requirements. Ammunition and explosive design standards may NOT be modified without the approval of the Naval Facilities Engineering Command (NAVFACENGCOM). When standard designs are used for a construction project, with or  without  modifications,  a  new  title  block  and drawing  number  are  required.  The  cognizant  EFD assigns these numbers. Another source of detailed construction draw- ings,   NOT   definitive,   is   found   in   NAVFAC P-437,  Facilities   Planning   Guide,   Vol.   1. These facility and assembly drawings contain re- producible drawings of pre-engineered structures used  to  satisfy  the  Naval  Construction  Force (NCF)  at  advanced  bases  in  peacetime  and  during contingency   operations.   Thus,   if   a   facility   is required  to  meet  tactical  and  strategic  situations, construction   planners   can   easily   and   readily identify and determine specific requirements and provide  support.  Other  useful  information  for SEABEE planners, such as crew size, man-hours by  skill,  land  area,  and  fuel  necessary  to  make a  component,  facility,  or  assembly  operational, is  contained  within  the  guide.  As  an  EA,  you should   realize   the   importance   of   becoming familiar  with  the  contents  of  NAVFAC  P-437. PROJECT  DRAWING PREPARATION All  NAVFACENGCOM  project  drawings  are prepared according to DOD-STD-100. The policy and   procedures   for   preparing   and   developing these  drawings  are  outlined  in  the  military  hand- book  MIL-HDBK-1006/1.  Project  drawings  must be  complete,  accurate,  and  explicit  since  they (together with the design specifications) form the basic   ingredients   used   in   contracts   for   the construction of naval facilities. EAs and in-house planners  also  benefit  from  clear  and  consistent project  drawings,  especially  when  revising  project drawings. POLICY  AND  STANDARDS The  design  criteria  for  project  drawings  are set  by  NAVFACENGCOM.  These  criteria  also 10-3