The sheets are numbered and bound sequentially as a set,for clarity and ease of use by contractors,sub-contractors,and others involoved in the project.
The sheet numbering system can vary according to the complexity of the project and office preference.For small projects.a simple numeric system can be used.Most offices prefer to use a system that identifies each area of specially by a prefix,such as "A"for the architecture or "S" for structural.A list of the most common prefixes follows however,other prefixes may be added as needed.
A - Architecture
S - Structural
M - Mechanical
E - Electrical
P - Plumbing
I - Interiors
F - Finishes or Furniture
Q - Equipment
Guildlines for preparing Construction Drawings:-
Before construction drawings are executed a considorable amount of work must precede their preparation,such as programming,preparing schematic drawings,and developing the design.The overall design of the project,general materials,finishes,and other particulars must already be established.Preliminary information from other consultants,such as electrical and acoustical engineers,must be collected and available for input into the drawings.A building-code analysis must be done to confirm the project meets requirements for the protection of the public's health,safety,and welfare.
Before the construction drawings are drafted up,a mock-up set is first created to give an overview of the sequence of sheets and their individual contents,as shown in it.This process helps to organize the drawings and reduces the risk of overlooking important information and relationships between drawings.These mock-up drawings are generally drawn on a small scale,such as half-size,quarter-size,or even smaller.Each drawing to be placed on a separate sheet is blocked out as a rentengle at the properly scaled size with its title,reference number,and the scale it is to be drawn to.This mock-up set of drawings serves as a guide for the individual or team when preparing the construction drawing set.On a small project,a small number of mock-up drawings may be required,whereas larger projects demand a carefully planned out mock-up set,which usually requires a greater number of drawingsand more details.
Sheet size:-
The size of sheets that drawings are done on can vary among professional firms,depending upon office standards,the type of project,and the form of reproduction selected for the drawings.Generally,sheets are composed in a horizontal format,and multiple sheets are bound on the left side,as for a book.In this case,the left border of the sheet becomes the binding side,and drawings are placed no closer than 1-11/2 inch (25-38mm) from this edge.Drawings,lettering,and dimensions are composed so they can be read from the bottom of the sheet when viewed in the horizontal position,as illustrated in it.It some notes to be readd from the right side of sheet,but never from the top or left side.
The most common sheet sizes used by offices are 18x24 inches(457 x 609mm.),24 x 36 inches (609 x 914mm).and 36 x 48 inches (914 x 1218mm).small drawings,such as revisions or additions to a large drawing ,are typically drawn on 81/2 x 11 inches (213 x 275mm.),8 1/2 x 14 in. (213 x 350mm), or 11 x 17 in. (275 x 425mm).These smaller sizes are based on standard photocopler,inkjet, and laser printer machies.
Standard paper sizes include A,B,C,D,and E in inches in architectural sizes.Metric sizes are measured in millimeters and include A4,A3,A2,A1,and A0.
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