Blueprint Reading Review
General Notes
Applies to the blueprint in general and not a specific item
Perspective Drawings
Artistic and Realistic Lines are drawn that the parallels appear to converge towards on or more vanishing points
49th Parallel
Canada/US Border
CSI (specifications)
Construction Specification Institute Contains 50 divisions
Title Block
Contains information about the drawn object
Right Side View Dimensions
Depth and Height
Top View Dimensions
Depth and Width
Plumbing Specifications
Division 22
Elevation Views
Drawings that show orthographic front or side views
Contour Lines
Drawn on a site plan to show areas having the same elevation
Double Line Piping Drawing
Drawn showing outside diameter Dimensions based on the center of the pipe
Detail Drawings
Drawn to a larger scale
Pipe and Fitting Drawings
Drawn: Single Line Double Line
Written Note Types
General Notes Local Notes
Oblique Drawings
Have a front view drawn at 90 degrees to the paper and the other lines drawn at 45 or 30 degrees to the front view
Elevation of Main Floor
Important Info found on site plan
Parallels
Lines of latitude East West Lines
Meridians
Lines of longitude North South Lines
Legend
List that describes the types of symbols found on the blueprint
Schedule
List that describes types of doors and windows
Orthographic Piping and Isometric Drawing Dimensions
Measured: Center to Center Center to Face
Geodetic Elevations
Measurements of elevation starting at sea level
Architectural Elevations
Measurements of elevation that start the main floor at 100
Line Types
Object Extension North Arrow Dimension Phantom Hidden Cutting Plane Leader Center Break
House Blueprint Drawing Organization
Organized similar to stages of construction
Leader Line
Points directly to a surface for dimensioning or adding notes
Floor Plans
Show a top view including dimensions of exterior walls, as will as dimensions of doors and windows
Site Plans
Show the entire building site and surrounding areas
Cutting Plain Line
Shows a sectional view of a drawing Arrows indicate the direction to view section Numbers indicate the page to find section view Letters identify section view
Short/Long Break Line
Shows a short or long break Conserves space on a drawing
Extension Line
Shows dimensioning points
Hidden Line
Shows edges and outlines not visible to the eye
Center Line
Shows the center of circles, arcs and symmetrical objects
Object Line
Shows the visible shape of a part
Phantom Line
Shows: - alternate positions of a part - relationships of existing and new parts - machined surfaces
Sectional View Drawing
Similar to Orthographic view drawing Has cut surfaces with are drawn using section lines
Isometric Drawing
The horizontal planes are represented y lines that recede from the horizontal at 30 degrees
Pictorial Drawings
Three dimensional representations of objects Sub types: -perspective -oblique -isometric
Common Orthographic Views
Top Front Right
Dimension Line
Touches the extension lines and show distance given by the dimensions`
Pictorial and Orthographic
Two basic types of blue print drawing
Metric Dimensions
Units are not shown Usually millimeters
Ruler Reading and Drawing Dimension Discrepancy
Use drawing dimension
Symbols on Drawings
Used for simplicity
Mechanical Specifications
Used to be in division 15
Dimension Lines
Usually placed below the dimension number
Front View Dimensions
Width and Height
Specifications
Written guidelines for a construction project and serve as the rule book
Isometric
equal measure
Orthographic Drawings
-Working Drawings -Two or more views of the actual shape of a three dimensional object, with each view n a single plane
Township
36 section grid made up o township lines and range lines
Hardest Pencil Lead
4H
Local Notes
Applies to a specific item on the blueprint
