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Coursework Exercise 3

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.


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Specification for the structure

BASE SLAB


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FLOOR PLAN

Walls are 300 mm and 150 mm.


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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


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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.


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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


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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.


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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)


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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.


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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)


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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.


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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.


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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.


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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.

[email protected]

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.

mailto:[email protected]