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decide which type of drawing is required to answer each question.

1 How many panels are there altogether on this wall?
2 What profile are these hollow beams: rectangular or circular?
3 What are the positions of all the floodlights around the deck perimeter?
4 How many branches come off the main sprinkler supply pipe?
5 How do all the internal components of the fan unit fit together?
3a What is meant by scale on a drawing? In pairs, explain how a scale rule, like the one
shown in the picture, is used.

b ►4.2 After receiving the drawings for the panels, Joe is now discussing some details
with Pavel, a colleague. Read the conversation and answer the following questions.
1 What piece of information is not shown on the drawing?
2 What golden rule is mentioned?

Pavel: So how wide is this panel at the top?
Joe: Good question. There's no dimension.
Pavel: Is this drawing to scale? It's one to five. Have you got a scale rule? Let's measure it. It
looks to be about three hundred mil.
Joe: The golden rule is, you shouldn't scale off drawings, though, should you?
Pavel: Well ...
Joe: It’s not so bad if it's actual size, on a full-scale drawing, but I'd rather not with this. Let's
query it. I'll give them another call in the office.

c Complete the following extracts from the conversation and explain what is meant by
each one.
1 Is this drawing scale?
2 It’s one five.
3 ... you shouldn’t scale drawings ...
4 ... it’s actual size, on a -scale drawing ...

4 You are engineers on a project to design the metal handrail that will run around the
perimeter of the top, outdoor deck of a large cruise ship. In pairs, discuss what drawings
you will need to produce for manufacturing and installation with regard to the following
issues:
• the types of view that will be required and what each one will show
• the approximate scale of different drawings and views
• what written information you will need to provide in the specification.

5 You are going to provide design information to enable a production team to manufacture
a product or appliance you know well. Make a list of some of the drawings that will be
needed, noting what each one will show.

II Discussing dimensions and precision
6a In pairs, discuss what is meant by precision and accuracy.
b Read the technical advice web page and answer the following questions.
1 How is a superflat floor different from an ordinary concrete floor?
2 What accuracy can be achieved with ordinary slabs, and with superflat slabs?
3 What problem is described in high bay warehouses?

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