# 2.3 The skill of drawing on scale

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## The skill of drawing on scale

Activity 1:

To do an architectural drawing of the new classroom

An architectural drawing is called a plan. The house you live in was first planned by an architect and the plans were given to the builder who built the house according to the plan. A plan is more complex than an orthographic drawing. It often includes the building materials, kitchen and bathroom layout, furniture, electrical points and water layout. All plans must comply with building regulations and must be approved by a local building depart­ment. Plans are used to determine the cost of a building. The building cost of a house these days varies from R2 000 to R5 000 per square meter (R2 000 - R5 000 / m2 ).

• The illustration below is a simple plan of a garage and store, which a person built next to his house.

SECTION DD

1:100

WEST ELEVATION: 1: 100

east elevation: 1:100

NORTH ELEVATION: 1: 100

SOUTH ELEVATION: 1: 100

Use grid paper and produce a location drawing (plan view) of your classroom. You must indicate where the doors and windows are to be placed. Also add dimensions to your drawing. The grid will help you with the scale. Use one block for 1 meter. Calculate what the cost of the classroom will be if the building cost is R3 000 per square meter (R3 000 / m 2 ).

The following is an example of a plan view of a building.

 LO 1.9

Activity 2:

To develop a scale model of the new classroom

Most architects produce scale models to show their clients what the final product will look like. Materials such as paper, cardboard or styrofoam can be used to convert all the 2-D drawings into a 3-D model. Cardboard can easily be cut and then glued on to grid paper to establish the right scale. Add some colour and you have developed a demonstration model.

1. Produce a scale model of your classroom. You might leave one section of the roof off to show the layout on the inside.

 LO 1.10

2. Formulate at least five criteria for the evaluation of your plan (refer to the design brief), and evaluate the model. Write down the outcome.

 LO 1.13

3. Present your idea to the rest of the class.

 LO 1.15

## Assessment

 Learning outcomes(LOs) LO 1 TECHNOLOGICAL PROCESSES AND SKILLS The learner will be able to apply technological processes and skills ethically and responsibly using appropriate information and communication technology. Assessment standards(ASs) We know this when the learner: investigates:1.1 identifies and explains a problem, need or opportunity from a real-life context, and investigates the context, the nature of the need, the environmental situation, and the people concerned; 1.4 uses a variety of available technologies and methods to: locate (e.g. use library referencing system, database searches, indexes); collect (questionnaires, data collection forms, requests for information, information searches, literature surveys); compare; sort; verify; evaluate; store information; designs:1.5 writes or communicates a short and clear statement or a design brief for the development of a product or system related to a context, problem, need or opportunity that has been identified by self; 1.6 lists product specifications and design specifications and constraints for a solution to an identified problem, need or opportunity based on all of the design key words listed below: people, age, target market, human rights, access; purpose, function, what the product will do; appearance and aesthetics: form, colour, shape, feel; environment: where product will be used or made, impact on the environment in the long and short term; safety: for users and manufacturers; cost, cost of materials, wastage, cost of manufacture, maximum selling price; ergonomics; quality; production; 1.7 generates a range of possible solutions that are significantly different from each other, and that show clear links to the design brief and specifications and constraints; makes:1.9 develops plans for making that include all of the following: resource lists (e.g. materials lists, tools, people, cost); formal drawings showing dimensions or quantities (e.g. orthographic, oblique or isometric views, sequence drawings, exploded views); manufacturing sequence; 1.10 chooses and uses appropriate tools and materials to make designed products with precision and control by measuring, marking, cutting or separating, shaping or forming, joining or combining, and finishing a range of materials accurately and efficiently; evaluates:1.13 evaluates the product or system based on self-generated objective criteria linked directly to the design brief, specifications and constraints using self-designed procedures (e.g. surveys, questionnaires, testing procedures) for self-testing, and suggests sensible improvements or modifications that would clearly result in a more effective or higher-quality end product; communicates:1.15 presents ideas (in a project portfolio) using formal techniques, in two-dimensional or three-dimensional sketches, circuit diagrams or systems diagrams that include all of the following features: use of SA conventional drawing standards (e.g. scale, outlines, dimension lines, first and first angle projection; notes that clarify design reasoning and key choices; impressive enhancements of significant sketches (e.g. colour, texture, shade, thick and thin lines, shadow).

can someone help me with some logarithmic and exponential equations.
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
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Sherica
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Sherica
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Tamia
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a perfect square v²+2v+_
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algebra 2 Inequalities:If equation 2 = 0 it is an open set?
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
rolling four fair dice and getting an even number an all four dice
Kristine 2*2*2=8
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No. 7x -4y is simplified from 4x + (3y + 3x) -7y
is it 3×y ?
J, combine like terms 7x-4y
im not good at math so would this help me
yes
Asali
I'm not good at math so would you help me
Samantha
what is the problem that i will help you to self with?
Asali
how do you translate this in Algebraic Expressions
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
what's the easiest and fastest way to the synthesize AgNP?
China
Cied
types of nano material
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
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Yasmin
what is the function of carbon nanotubes?
Cesar
what is nanomaterials​ and their applications of sensors.
what is nano technology
what is system testing?
preparation of nanomaterial
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
what is system testing
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
how did you get the value of 2000N.What calculations are needed to arrive at it
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