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STRUCTURAL   DRAWINGS

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Figure 10-17.-Use of a letter to identify elevation on irregular floor plans. irregular plans, such as shown in figure 10-17, the elevations  may  be  identified  by  a  letter  or  a number. The  following  basic  procedures  will  serve  as a  guide  in  the  development  and  drawing  of elevations: 1. Use the same sheet size as that of the floor plan. Determine the overall height and length of the   elevation   from   the   floor   plan   and   wall section  (predetermined  by  prior  computation  or a sketch). We assume that you are using the same scale  for  elevations  as  for  the  floor  plan.  Block in the views with construction lines placed in a logical order, such as starting with the front view and working around the building. Generally, the front  and  right-side  elevations  are  next  to  each other,  and  the  rear  (if  necessary)  and  the  left-side elevations are shown below. Whenever possible, show  all  of  the  elevations  on  one  sheet. 2. Draw the exterior limits of the elevations. The  floor  plan  may  be  placed  underneath  the drafting  sheet  on  which  the  elevations  will  be drawn. Vertical projections determine and define the  length  of  exterior  walls,  any  breaks  or corners along the wall, windows, roof overhang, doors,  and  other  elements,  such  as  chimney location.  Horizontal  projections  from  a  wall section   locate   the   height   of   the   doors   and windows, the cave line, the bottom of fascia, the top and bottom of the footing, and the top of the roof to the space in which the elevation is to be drawn. 3.  Repeat  this  process  until  all  of  the elevations are lightly laid out and final changes are incorporated into the exterior design. Darken the  drawing,  following  the  same  procedures used  in  the  floor  plan:  from  left  to  right,  top  to bottom,  until  completed.  You  must  remember that all of the portions drawn below the grade line are shown with a dark hidden line, and the grade line is the darkest line on the elevation drawing (disregarding  the  border  lines). 4.  Add  the  dimensions.  Show  only  vertical dimensions  to  include  the  following:  the  bottom of  the  footing,  all  of  the  finished  floor  lines, finished  ceiling  lines,  finished  grade,  height  of features,  chimney  height,  and  freestanding  walls. Refer  to  chapter  3  of  this  book  for  additional information on drafting format, conventions, and techniques. 5. Add all notes and pertinent information on exterior   materials   and   finishes,   title,   scale, window   identification   marks,   and   roof   pitch. Section symbols (fig. 10-6) may be shown on the elevation  to  indicate  where  the  sections  have  been taken  (fig.  10-16). 6.  Finish  up  the  elevations  by  adding  the material symbols (fig. 10-7). Notice that symbols do not take the place of the material notations; they just supplement them. Go over your eleva- tion  checklist  for  completeness  and  accuracy  of information. STRUCTURAL   DRAWINGS STRUCTURAL   DRAWINGS   (sometimes identified  with  the  designating  letter  S on their title blocks) consist of all the drawings that describe the structural members of the building and their relationship  to  each  other.  A  set  of  structural drawings includes foundation plans and details, framing plans and details, wall sections, column and   beam   details,   and   other   plans,   sections, details, and schedules necessary to describe the structural  components  of  the  building  or  struc- ture. The general notes in the structural drawings should also include, when applicable, roof, floor, wind,  seismic,  and  other  loads,  allowable  soil pressure or pile bearing capacity, and allowable stresses of all material used in the design. 10-20



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