How to Read an Architectural Scale 1/2
Yous can download a handy pdf of this post Understanding Scale Drawings past clicking the download button beneath!
Understanding the concept of architectural scales and calibration drawings
Scale drawings allow united states to accurately represent sites, spaces, buildings and details to a smaller or more applied size than the original.
When a drawing is described as 'to scale', it ways that each element in that drawing is in the aforementioned proportion, related to the existent or proposed matter – information technology is smaller or indeed larger by a particular per centum.
If something is 'fatigued to calibration' we wait that it has been drawn, or printed, to a common scale that is used as standard in the construction industry. As we gain a better understanding of calibration, we can view a drawing in a particular calibration and instantly recognise and understand the spaces, zones and gain a quick understanding of the existing or proposed spatial relationships.
In the existent earth, ane meter is equal to one meter. A drawing at a scale of 1:10 ways that the object is 10 times smaller than in real life scale 1:1. You could too say, 1 unit in the drawing is equal to 10 units in existent life.
As the numbers in the scale get bigger, i.e. ane:fifty – i:200, the elements in the drawing actually get smaller. This is because in a drawing at 1:50 at that place is one unit for every 50 unit in real life. A cartoon of ane:200 is representing 200 units for every i unit of measurement – and therefore is showing the elements smaller than the 1:fifty cartoon.
Information technology is worth noting that scale drawings represent the same units. So, if a cartoon is at 1:50 in cm, 1cm in the drawing will be equal to 50cm in real life. Similarly, if a cartoon is in mm, at 1:200 – one mm unit in the drawing will represent 200mm in real life.
The image above shows an example of a drawing set with different scales to demonstrate unlike aspects of the pattern. (cad cartoon courtesy of bibliocad.com). You may desire to represent a site plan at a calibration of 1:500, but perhaps testify floor plans at 1:100 for example.
Working with scales for architectural representation
In compages, nosotros utilise a collection of standard scales to correspond our designs. For example, information technology is common practice to produce flooring plans at a scale of 1:100 (dependent on size of projection and paper). Once you proceeds an agreement of scales, it is easy to understand which calibration is most suited to which type of drawing.
Scale bar blocks courtesy of cad-blocks.co.uk.
These scale bars show what ane unit represents at different scales.
The full general requirement of a scaled cartoon is to convey the relevant information clearly with the required level of detail. If you are working in exercise there will often be part standards. For instance, they may but use layout sheets of either A3 or A1 – depending on the calibration of the projection and information that is being represented. As a pupil, you need to make these decisions based on industry standard. It is always best to utilize a 'round' scale, i.e., one of the scales mentioned below, and not make upwardly your own.
What scale should I use?
The following looks at the recommended scales for architectural apply in the metric system. The called scale and paper size will often depend on the size of site/design of each private project.
Location Plan and Key Plans
i:1250 (ofttimes requested by planners)
1:1000
1:500
Site Plans, Sketch schemes etc
one:200
1:100
Plan drawings – floor plans, elevations, sections
1:100
1:50
Room plans, interior elevations
1:20
Component / item drawings
i:10
one:5
Working out the calibration
A calibration is shown as a ratio, for example one:100. A drawing at a calibration of one:100 ways that the object is 100 times smaller than in existent life scale 1:1. Y'all could also say, 1 unit in the drawing is equal to 100 units in real life.
And then, if nosotros were cartoon a table that measured 100cm wide past 200cm long at a scale of 1:l, y'all would draw the table 2cm wide by 4cm long on your piece of newspaper. This is worked out by dividing the real life size (100cm) past 50 (one:50 scale). This gives you a result of 2cm. For the length of the table nosotros divide 200cm past fifty to get a result of 4cm.
Of course, it is not necessary to summate the required measurements when you draw. Y'all can either apply a calibration ruler to manus describe your plans, or software such as Revit, AutoCAD, ArchiCAD that will allow you to nowadays your drawings at any scale and easily switch between scales as required.
How to utilize a calibration ruler
A scale ruler is a tool that architects, engineers and designers use to draw their designs at an advisable scale that it fits on a piece of newspaper and is in proportion to accurately convey the scheme. The calibration ruler comes in different shapes, flat or triangular but they all provide sets of graduated numbered spaces, that establishes a proportion of i unit to the specified unit, i.eastward. different scales. As an example, the ruler I have in front of me now has the following scales; 1:1, 1:100, 1:20, 1:200, ane:5, i:500, 1:1250, 1:2500.
Calibration rules have varying number of scales on them, depending on their intended use. Using a scale dominion is pretty like shooting fish in a barrel when you know how.
When you are cartoon a programme, you select the calibration you intend to utilise by plow the ruler to the advisable side. You tin so describe the line to the desired measurement using the scale ruler. For example, if y'all have select to describe a 5m wall at 1:100, yous would select your i:100 side of the ruler, and draw 5 units along the ruler, every bit each unit represents 1m.
When you are reading plans, you establish the scale of the cartoon or plans, and select that scale on your ruler, you lot are then able to measure the lines using the correct calibration.
How to calibration a cartoon up or downwardly
Allow's wait at converting a scale drawing to a unlike scale. You lot can considering irresolute the scale of a drawing past a decimal factor or by a percentage. For example, lets imagine nosotros have a cartoon at ane:50, only we desire meliorate the scale, to show that cartoon at one:200. A cartoon at 1:200 is 4 times larger than a cartoon at i:l, therefore we would need to increase the size of the cartoon four x. The table below demonstrates the different calibration factors required to catechumen a calibration upward or downwardly.
Table: Converting scales upwards or down
Being able to scale drawings up and downwardly using percentages has become very useful as well. Working in Adobe (Photoshop, InDesign etc), you will notice you tin can accommodate the size of an object using a percentage, which is great if you are wanting to accurately scale a drawing up or downwardly while working in photoshop while maintaining a precise scale.
Lets imagine you are working on a drawing that you take imported into an A4 sized photoshop certificate. The drawing you have imported does not quite fit at its current scale of 1:fifty, so you will demand to reduce the scale in order to squeeze the prototype onto the page, while maintaining an accurate scale. Past using the table below, we tin can come across that to convert from a calibration of 1:50, downwards to ane:100 we would need to reduce the drawing by 50%. To do this we would make sure the dimension ratios of the epitome are locked, and proceed to type l% into the size box.
Obviously this is a simple case but you lot become the idea. The table beneath provides the basic conversion percentages to scale a cartoon up or down using the standard metric scales.
Tabular array: Converting scales upwardly or down
Newspaper size scales and magnification
We can now expect at amending paper size scales and magnification. There are times when you may have a drawing on an A4 slice of paper, that you need to scale upwards to an A3 slice of newspaper for instance. Let's imagine you were needing to trace this cartoon so would use a photocopier to calibration the drawing upwards to the necessary size.
How to convert paper sizes?
To convert the newspaper size you can utilise the percentages in the table below. Note that these percentages exercise not stand for to the scale factors. So, if yous scale or magnify a paper size accurately, it does not hateful that you will retain an accurate (or standard) scale of the drawing. So, if you want to increment the scale of a drawing using a photocopier, but want to increase it to a standard scale (i:10 for example) so you lot must utilise the percentage factors for converting scale. If information technology is just the newspaper size you lot wish to change, then you lot tin can employ the paper size converter. I hope that makes sense.
Tabular array: Converting paper sizes and magnification factors
Working with paper sizes
When working with ISO paper layouts we know that the standard size of paper was developed on the ground of an area of 1m2, divided co-ordinate to the ratio of the sides.
This bones format of 1m2 then forms the basis for all other smaller sizes. All A sized paper is either halving or doubling the basic format.
Ten x Y = 1
Below is a list of all the A paper sizes.
Working with scales digitally
One of the great things about using digital drafting software is that you tin produce drawings as multiple scales from one single drawing. Programs such as Revit, AutoCAD, ArchiCAD and many more, allow you to draw upwards your designs at 1:i scale, that is existent life size, and produce drawings or plots of these designs at an appropriate scale for the paper size y'all have selected.
When working in CAD you tin let the software do some of the difficult work for you past making use of the paper infinite option to create layouts. On your layout sheet yous are then able to create viewports which feature your drawing at the required scale. I accept recorded a couple of tutorials that will help with setting up drawings for press at advisable scales.
I have also recorded a tutorial that explains how to scale a drawing in cad. This is useful if y'all take imported a cartoon at a different scale.
You tin download my dynamic calibration bar cad blocks hither:
Y'all can download a handy pdf of this post by clicking the download button below!
Hope yous detect this useful, if you have whatever questions, or there is something else you would similar to know most, please drop me an emaill (emma@firstinarchitecture.co.uk) or annotate below 
Source: https://www.firstinarchitecture.co.uk/understanding-scales-and-scale-drawings/
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