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Coursework Exercise 3
Page 1 of 14 MJC: Oct 2012
Module 10321: Design 1
AutoCAD
Exercise 3 3D exploration
Exercise 3 is to construct a single story beach house in 3D as shown above. The commands
required to complete this task are given in these guidance notes.
Coursework Exercise 3
Page 2 of 14 MJC: Oct 2012
Specification for the structure
BASE SLAB
Coursework Exercise 3
Page 3 of 14 MJC: Oct 2012
FLOOR PLAN
Walls are 300 mm and 150 mm.
Coursework Exercise 3
Page 4 of 14 MJC: Oct 2012
Wall Openings
One reqd. Five Reqd. Four Reqd.
DOORS
One reqd. Two Reqd. Four Reqd.
WINDOWS
No.Off Width Height Cill Height
2 2000 1500 500
2 2000 1000 1500
2 1000 1000 1500
Coursework Exercise 3
Page 5 of 14 MJC: Oct 2012
STAIRS
ROOF
The structure will have a flat roof 300 mm thick.
Railings / Parapet
The base will be edged with railings made from 30 mm tubular steel 1000 mm high with a maximum
spacing of 120 mm. A handrail shall be provided made from 50 mm tubular steel.
The roof shall be edged with a parapet 1000 mm high and 300 mm thick.
FURNITURE / EQUIPMENT
Typical furnishings and equipment should be shown.
Coursework Exercise 3
Page 6 of 14 MJC: Oct 2012
Drawing guidance
Arrays
Arrays are used to copy a single entity and create a pattern
of identical entities. They can be used in 2D and 3D.
Rectangular Array
Path Array
Polar array
Coursework Exercise 3
Page 7 of 14 MJC: Oct 2012
Viewcube
Clicking on the Viewcube reorientates the drawing
UCS (User Co-ordinate System)
Entities can only be drawn in the XY – Plane.
To draw things in 3D therefore requires the XY-Plane to
reoriented to desired position,
The UCS options, Top, Bottom etc. Correspond to the faces of
the Viewcube.
Coursework Exercise 3
Page 8 of 14 MJC: Oct 2012
3D Extrusions
In exercise 3 there will be three types of extrusion required.
Extrusion of a solid requires that the shape should be a Polyline,
i.e. the outline is one continuous line.
A rectangle or circle can be extruded because these are already
Polylines.
An outline made up of a number of lines or arcs can be
converted into a Polyline (see PEDIT)
Coursework Exercise 3
Page 9 of 14 MJC: Oct 2012
To convert to a Polyline select one entity of the group at the
prompt,
“…not a Polyline do you want to turn it into one?” choose Y(es)
Then type J for join and select the other entities and press
return/space bar.
To use the Presspull command a (Polyline) shape is drawn onto the
face of a solid and dragged with the mouse to the required distance.
3Point UCS
The other way to move the XY-Plane is to use the 3point UCS option.
Select a new origin,
Select the positive X-direction
Then the positive Y-direction.
Coursework Exercise 3
Page 10 of 14 MJC: Oct 2012
How to Draw Spiral Steps
Exercise 3 will require spiral steps to mount a curved part of the building base slab
Draw a step using two circles and two lines as shown.
Trim and convert to a Polyline.
Use the Draw – Helix command
Draw a helix located at the corner of the step.
Set the height between turns as 10,000 (10m) and the
number of turns to 0.1 (36/360)
Coursework Exercise 3
Page 11 of 14 MJC: Oct 2012
Extrude the step (150mm)
Use the path array command to create enough steps to reach
the top of the base slab.
Switch from 2D Wireframe to Conceptual to see the result
shown left.
The rest of the base slab can be extruded.
Coursework Exercise 3
Page 12 of 14 MJC: Oct 2012
Joining Solids
Solids can merged together by using the Solid Union
command. There is an equivalent command for subtracting
solids when required, as in the ramp section below.
Making a Ramp
To make a Ramp use the Wedge command as shown left.
NOTE: The slope of the Wedge is the X-Direction so arrange
the UCS to suit.
Draw the rectangle to the required size and set the depth
by entering the dimensions at the command line.
Coursework Exercise 3
Page 13 of 14 MJC: Oct 2012
It is probably easiest to align the wedge with the edge of the
base slab …
… then move it to the correct position.
Use the Solid, Subtract command to remove the wedge
from the base…
.. to give the required result.
Coursework Exercise 3
Page 14 of 14 MJC: Oct 2012
LAYOUT DRAWING
Produce a layout drawing with five viewports showing the following views at a scale of 1:200:
West Elevation
South Elevation
Floor Plan
North-West Isometric
South-West Isometric
Drawing Submission
Exercise 3 should be submitted, together with Exercise 2, via email to the address below.
We must be able to identify ownership of your drawing from its name so please use the following
file naming convention…….
first name_lastname_exe3 (file name)
1st Year Civil CAD Exercises 2 & 3 (email subject line)
Your email address and name must be clearly visible on your drawing.
Due to numbers involved we cannot acknowledge receipt of emails.
Submission date is no later than 17:00 on
Friday on the date given in your course timetable.