Ruler T

Top & Best Ruler T Review 2022- How to Select Ultimate Buyer’s Guide

Ruler T: How to choose the best one in 2022?

Today the article will teach you everything necessary for you to make the best choice of a T-Rule. Whether for professional, school or home use, read the full content before purchasing.

The T ruler is one of the best friends of architects and engineers. Thanks to this product, the horizontal lines have no limits in the projects. Although the tool is an old ally of industrial design, today there are some differences between the versions.

Follow the reading to discover aspects such as: the best products, ways to differentiate the offers, what price to pay, where to buy and some techniques for selecting T rulers with less costs, with more benefits.

First, the most important

  • Ruler T can have a fixed or adjustable head, we will explain the differences.
  • The main T strips are composed of wood and (or) acrylic.
  • On average, the ruler T is 50 centimeters to 80 centimeters.

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Ranking: The 4 best T rules

To keep your mind a little more up to date on the best technical attributes that a T ruler should have, follow the technical definitions of 4 productions popular among professionals:

Buying Guide

In order not to worry about tying up clipboards, the tendency to use T-rulers also increases among architects and engineers in early career.

Then follow a content that guides you in the search for the perfect version of T-rules according to your usage needs

What is T ruler and what is it for?

Known as one of the oldest tools in the world of architecture, the T ruler is one of the instruments used in order to develop technical drawings.

This ruler is used together with the square. However, sometimes it must be used alone in order to make parallel line traces.

The product has a T shape, with the smaller side composed of the head that may or may not have the same materials as the ruler itself. The models are 80 centimeters maximum, made of wood or plastic.

How to use T ruler?

In the case of fixed structures you must support the head next to the table with or without a projector. In flexible versions, you must first unscrew the head and then place it in the correct position (on the side of a table).

The head of the ruler T must be very well fixed on the table for you to enjoy the best that the tool can offer.

See how to use the model with squares and mechanical pencils in a practical video lesson from the channel Rabel Arquitetura e Cursos:

What are the advantages of the T-ruler?

Many people look for the T-ruler as a result of the product’s practicality in being used in different types of tables, which justifies the fame of the production among students who need to make industrial designs.

When you have a tailstock, the tool is easier to store. However, if the structure is fixed, it becomes more difficult to move around, unless you have a case suitable for the T shape.

Differences in materials and prices make the product available to professionals with a lot or a little money reserved for investment in the material.

The best productions are almost unbreakable, whereas non-certified plastic models can easily break during use or because of impacts.

The details of the pros and cons you can find in the table below:

T-ruler or parallel ruler: Which is better?

These two rules are widely used in industrial design. However, one version has more advantages for certain people, while the other seems to benefit another type of audience. Know the differences between both models.

T-ruler : Among the most popular architectural tools is the T-ruler. With it you don’t need to tie anything to the drawing board, the structure works in different sizes or types of tables.

Production has only one foothold. For this reason it is necessary to use the ruler T in the proper way, with both hands, avoiding angulations.

Parallel ruler : In the case of a parallel ruler, both ends have support on the drawing board, which makes it easier to work parallel to the drawing, without the need to use both hands.

As a disadvantage this ruler cannot be used on common tables because of the short side ropes to tie.

Keep an eye on the differences in the rules as you follow the chart below:

How much?

The price of a quality T ruler used by professionals can range from R $ 50 to R $ 120 on average. The adjustable wooden models have high prices. Wood and fixed production costs an average price.

Sturdy acrylic items are more expensive than versions that feature a common plastic that resists friction less. When buying any edition on the internet you will save up to 20% on the final price.

Where to buy?

Plastic versions are easier to find than good wooden models at popular retailers. You can find promotions in places.

In online shopping you don’t have to worry about shipping. Salespeople deliver everything to the door of your home or office. Amazon is the most reliable site, full of variations of different types. You can also find it in the digital versions of the stores mentioned.

Purchasing criteria: Factors to compare T-ruler models

Do not forget that to make the most of the design features, you need to know how to differentiate the best from the worst models, so that you can choose the best T-ruler. The 5 best comparator criteria for T-ruler versions are:

  • Case
  • wood
  • Material
  • Screw
  • Protractor

Follow the meaning of each item listed as you continue reading.


In day-to-day running it is common to hit the ruler in one corner or another, especially when it is in the backpack. Although these products are resistant, when strong friction occurs, production can break, putting your investment in check.

For this reason many people choose to buy offers of rulers that also have the famous protective case, which is not heavy, but serves to protect more effectively.


The productions most resistant to falls and friction are composed of wood. Preferably, buy editions that have hardwood composition, mainly: Ipê, Cumaru or Carvalho, models that have high levels of Janka hardness – a measurement unit that serves to demonstrate how hard a wood can be.

If you value durability, also choose the T-rules that have treatment to avoid warping or termite attacks. Varnished models cost higher prices, although they are more resistant and durable.


The environment in which you work determines the choice of material. For example, those who design projects outdoors, at the construction site, can choose the plastic versions. They do not stay with fungi and resist rainwater or other bad weather.

To draw indoors you must invest in wooden rulers, as there will be no contact with natural elements such as: earth, water, sun, among others.

If you think that a T-board with 100% hardwood in the entire composition is something very expensive or heavy, you can invest in the mixed structures. There are versions of wooden body and plastic head, or vice versa.


You want to buy a T-ruler with a tailstock to make it easier to move your product from your office to the classroom, correct? No problem, as long as you buy versions that have quality in the screw.

To thread or unscrew it is necessary to move a kind of screw present in the center of the head on the tool. If it is difficult to move it from side to side it will be necessary to force it, which ends up breaking the ruler T.

Therefore, before purchasing your T-head with a tilting head, it is better to find out if the store or the sellers offer a guarantee. It must guarantee exchange or refund in case of problems related to opening via screw.


Sooner or later you need to use a protractor to add something to the project.

There are T-ruler editions that offer this accessory as an addition, making the architect’s life easier, making work practical with less extra rulers on the table.


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