Course Outline
Structural Drafting
Learning Outcomes
Course Objectives:
The learning outcomes for this course are consistent with the requirements outlined in the National Occupational Skill Standards, the American National Standards Institute (ANSI), the International Organization for Standardization (ISO) and the American Institute of Steel Construction (AISC).
Drafting equipment and drafting procedures
· Explain the use of CAD in structural drafting
· Define structural drafting
· Identify the different types of structural drawings
· Name the preferred style of lettering for structural drawings as recommended by the AISC and create a text style using CAD
· Explain what types of lines are used for border lines, object lines, invisible lines, dimension and extension lines, match and gage lines, and center lines
· Create layers and assign proper line types and line weights for border lines, object lines, invisible lines, dimension and extension lines, match and gage lines, and center lines
· Describe cutting lines, short break and long break lines
· List the general guidelines for the size of lettering used on structural drawings
· Identify the AISC standard for forming fractions
· Define structural steel sections
· Prepare structural steel full, partial, and offset sections
· Describe the proper proportions, type, and size preferred for arrowheads on structural drawings and create a dimensioning style using CAD
· List and identify the common dimensional units and drawing scales used for structural steel drawings
Structural steel
· Use the American institute of steel construction’s manual of steel construction for determining structural steel shape designations and dimensions
· List the structural steel shapes available and their symbols (beams, channels, angles, z-bars, and round tubular sections)
· Draw assigned structural steel shapes as specified in the AISC Steel Construction Manual
· Describe the usual method of billing and sketching structural steel shapes on shop drawings
· Define the terms “yield stress” and “tensile strength” as they relate to the physical properties of structural steel
· Define the term “mill tolerance”
Detailing and fabricating structural steel
· Sketch an organizational chart for a typical structural CAD department
· Write a job description for an entry level structural CAD technician
· List the primary duties of a junior CAD technician, a CAD technician, a senior CAD technician, a checker, and a drafting manager in a typical structural CAD department
· Explain the original drawing process, the checking process, the correcting process, and the revising process in structural CAD
· Define the terms “advance bill” and “shop bill”
· Prepare advance bills and shop bills for a given structural project
· Describe the bill of materials, its function, and the information, which it should contain.
Course Outline
Structural Drafting
Learning Outcomes
· Define and describe the following types of drawings: design drawings, details, erection plans, and shop drawings
· Explain the procedures followed in preparing design drawings, details, erection plans, and shop drawings
· Explain the AISC system of marks, index sheets and sheet numbers
· Define structural steel fabrication details
· Explain the methods of assigning marks to the various structural members on design and framing drawings, shop drawings, and for shipping and erections
Fundamentals of structural engineering
· Explain the types of loads which act on structures (live, dead, wind, and snow loads)
· Name and explain the types of stress which act on structural members (tension, compression, and shear)
· Define the terms beam, reactions, moment, and equilibrium
· Define and sketch an example of a simple beam, fixed beam, a cantilever beam, and a continuous beam
· Define the terms “uniform load” and “concentrated load” and sketch an example of each
· Write the mathematical formulas for the laws of equilibrium as presented in this course
· Calculate the end reactions of a simple beam having a uniform load using the AISC Manual of Steel Construction
· Calculate the end reactions of a simple beam having a concentrated load
· Define the term “bearing stress”
Connections-bolted
· Name the fastening methods employed in steel construction (bolting, riveting, and welding)
· Name and explain the two main types of beam-to-beam and beam-to-column connections
· List and describe the two types of seated beam connections: unstiffened and stiffened
· Explain the application of bolted, welded, riveted, split ring and shear plate connections in structural steel framing
· Define the terms unfinished bolt, machine bold, plain bolt and common or rough bolts.
· Describe the ASTM A325 and the ASTM A490 high strength bolts used in field and shop connections
· Sketch the symbols to represent the various types of shop bolts and field bolts used on structural steel drawings
· Describe how bolt and hole sizes are specified on a structural steel drawing
· Define the term bolt pitch
· Calculate the diameter of a high strength bolt in single shear and double shear given a load
· Calculate the number of high strength bolts needed in a simple beam connection given a load
· Calculate the proper location and pitch of bolts for a given standard connection
· Calculate the size and number of bolts in a connection using the AISC Manual of Steel Construction for a given beam
Structural Steel Drawings
· Construct structural steel framing plans according to engineering specifications
· Prepare a design drawing for a framing project including notes, dimensions, and loads needed for the preparation of shop drawings by the structural detailer
· Prepare a part plan drawing from a design drawing. Include all notes, dimensions, and information required to prepare shop drawings of the structural components
· Define the term “gage lines” and the importance of maintaining consistent gage of structural members
· Describe why it is important to maintain minimum edge distance for bolts and bolt holes
· Using the AISC Manual of Steel Construction determine the edge distance for a given connection detail
Course Outline
Structural Drafting
Learning Outcomes
· Describe the following features: copes, blocks, and cuts
· Calculate the “cut” dimensions for a beam-to-beam connection with “flush tops”
· Explain why and what types of assembly clearances are required between beams and columns and between beams and beams
· Calculate the “set-back” dimensions for a beam to beam connection
· Prepare a shop drawing of a beam including beam gages, cope cuts, set-back dimensions, edge distances, shipping marks, billing, and notes
· Prepare a connection detail of a beam to beam bolted connection
· Prepare a connection detail of a beam to column bolted connection
Connections-welded
· Describe the gas, arc, and resistance welding processes
· Identify and draw the five basic welded joints (butt. Lap, tee, corner, and edge)
· Identify the eight basic parts of an AWS (American Welding Society ) standard weld symbol
· Draw an AWS Standard weld symbol given a weld specification
· Describe the basic weld types (fillet, groove, plug, spot, seam, and surface welds) and their corresponding weld symbol
· Prepare a connection detail of a beam to beam welded connection
· Prepare a connection detail of a beam to column welded connection
Columns
· Describe the term levels
· Prepare a base plate drawing for a column
· Calculate the type, size, and number of anchor bolts for a column connection using the AISC Manual of Steel Construction
· Construct an anchor bolt plan for a given structural steel framing plan
· Construct a shop drawing of a column for a given structural steel framing plan
· Describe how right-hand and left-hand views of detail material are drawn or indicated
· Describe how rights and lefts of whole shipping pieces are noted by fabricating shops
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