what is a carpenter ruler

Probably invented in the 16th century, the carpenter's rule was a device to help a man who could not multiply to find the area or the volume of his timber.

Full Answer

How do you calculate ruler measurement?

••• Line up your metric ruler against the object you wish to measure, with one end of the object aligned with the 0 point of the ruler. ••• Count the number of centimeter lines from the beginning of the object to the end.

Can a ruler make accurate measurement?

This printable 6 inch ruler is actual size and it can be used to make fairly accurate measurements. With markings and gradations that are easy to read, this six inch ruler can replace a real one in certain situations. Simply download the 6” ruler template, print out the PDF document and start measuring!

How to read centimeter measurements on a ruler?

• We will measure the length of this eraser in centimetres using a ruler.
• We line the left edge of the eraser up with the line that points to zero on our ruler.
• We look at the right edge of the eraser and it lines up with the 4 on our ruler.
• The length of the eraser is 4 cm.

How many cm in a ruler?

Rulers are typically 30 cm long, with big numerals on the ruler indicating the length. There should be ten millimeters (cm) markings between each centimeter (cm) mark (mm). The term line is used interchangeably with measure.

What is the carpenter rule?

Who invented the rule of tymber measure?

How thick is a surveyor's rule?

What is the 4th line of the 17th century rule?

Do board and timber lines appear together?

Who made the board and timber line?

Did a carpenter ever use the rule to take actual readings of the length to make a square foot?

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About this website

How do you read a carpenter ruler?

0:043:51How to Read a Standard Tape Measure - The way I learnedYouTubeStart of suggested clipEnd of suggested clipSo the way I learned how to read a tape measure is that from each line to each line is equal to oneMoreSo the way I learned how to read a tape measure is that from each line to each line is equal to one inch. And all these lines on here are represented as a measurement.

How long is a Carpenters ruler?

When fully extended, it has a total length of 36"" or 1 meter long, making it a suitable tool for professional use and one that will serve a great many purposes. In total, the ruler folds into 4 different section.

What is a wood ruler used for?

Wood Rulers Keson wooden rulers have long been an essential tool for carpenters, mason's, plumbers and all types of tradespeople. They extend to over 6 feet (2m). They enable you to draw straight lines up to these lengths without the use of a chalk line or mason's line.

What do you call a folding ruler?

Most people call these "Carpenters Rulers" , or a "Folding Carpenter Ruler" , either way they fold and work great in most applications where a sturdy tape measure is called for. Most people that use a folding tape enjoy being able to hold with one hand and mark off. measurements with the other hand.

Why is it called a ruler?

You can measure the diameter of a circle with a ruler, and you can also draw a perfectly straight line using its edge. Both meanings stem from the verb rule, "to exercise power" or "to control," which came to also mean "mark with lines" in the 1590s.

What are the lines on a ruler called?

Hatch Marks “Hatch mark” is the name given to a mark on a ruler. Hatch marks are also known as hash marks.

What is an advantage of a wooden ruler compared to a tape measure?

A measurement by a rule will usually be more accurate than a tape measure and will not bend. You can hold a rule against a flat object much more securely than can be done with a tape measure.

What are wooden rulers made of?

Westcott wood rulers are made from selected hardwood with a multiple-coats of clear lacquer finish for durability. Featuring single or double metal edges to preserve the edge when used for straight-line drawing or cutting. Available in a variety of sizes from 12” to meter and yard sticks.

Is wood ruler made?

Types. Rulers have long been made of wood in a wide range of sizes. They are not however all wood. Plastics have been used since they were invented; they can be molded with length markings instead of being scribed.

How do you use a mason ruler?

A brick mason's ruler not only has the basic inch measurements of any ruler but also a brick-spacing rule that helps a mason mark courses while laying bricks. Measure the brick on the inches side of the ruler. When measuring the brick, include the mortar in the measurement.

What is a zig zag ruler?

zigzag rule in American English noun. a rule composed of light strips of wood joined by rivets so as to be foldable, all the opening and closing parts being in parallel planes. Also called: folding rule.

What is a wooden tape measure called?

The 25-foot tape measure is often called builder's tape as it is commonly used in the construction field. It often features measurements marked in feet and 16-inch increments.

How long does it take to become a carpenter?

It's an industry that involves both bringing people's home dreams to life as well as working on landmark commercial projects. A carpentry apprenticeship takes around four years and the BCITO qualification is the industry standard. To get one going you'll need the support of a builder who's willing to take you on.

Do twice before cut once?

Most of us have heard the expression 'measure twice, cut once'. Used in a carpentry sense (literal) it means you should double-check your measurements for accuracy before cutting a piece of wood; otherwise it may be necessary to cut again, wasting time, materials and money.

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What is the carpenter rule?

Probably invented in the 16th century, the carpenter's rule was a device to help a man who could not multiply to find the area or the volume of his timber. In its original form, it gave at a glance either the length to make a square foot of a board of given width, or the length to make a cubic foot of a piece of square ...

Who invented the rule of tymber measure?

The first written account of such a rule is probably that of Leonard Digges in 1556, but whether he invented the principle of it is open to question. He says that "... the ruler of tymber measure which the most part of them hath is not made by right arte...". hinting that some such rule was already in existence.

How thick is a surveyor's rule?

Digges recommended a rule 2' long, 2" wide and 1/4" thick; there is no mention of a joint and the board and timberlines were drawn along the edges. The thickness suggests that he had wood in mind for its construction and there was a small surveyor's quadrant on the back - hence the width. A fine brass rule for surveyors with board and timber line on the face, made by Humphrey Cole in 1574, is now in the Whipple Museum, Cambridge, and is illustrated by J A Bennett in "The Divided Circle".

What is the 4th line of the 17th century rule?

The fourth line on the 17th century rule I have been describing (Fig 4) is a rarity of unknown purpose. It works like the board line, though to a constant product of 108 square inches, 3/4 square foot or the area of a foot run of 9" board. Perhaps there was already a standard 9" width softwood, later known as a "deal."

Do board and timber lines appear together?

The board and timber lines appear together on one face (Fig 3), the other face being shared by the line of inches and some other line of the maker's choice. The tables for narrow material were now concentrated, each at the start of its own line and numbered in sequence with it. Inevitably the board and timber lines had to start from opposite ends of the rule, with loss, not only of their juxtaposition with the line of inches, but the neat inverse relationship of both of them with it as well.

Who made the board and timber line?

A fine brass rule for surveyors with board and timber line on the face, made by Humphrey Cole in 1574, is now in the Whipple Museum, Cambridge, and is illustrated by J A Bennett in "The Divided Circle".

Did a carpenter ever use the rule to take actual readings of the length to make a square foot?

It is extremely doubtful whether a carpenter ever used the rule to take actual readings of the length to make a square foot or a cubic foot, because such a figure would have been quite useless to him if he was incapable of dividing it into the length of his timber by arithmetic.

Combinatorial proof

Subsequently to their work, Ileana Streinu provided a simplified combinatorial proof formulated in the terminology of robot arm motion planning. Both the original proof and Streinu's proof work by finding non-expansive motions of the input, continuous transformations such that no two points ever move towards each other.

Generalization

John Pardon ( 2009) generalized the Carpenter's rule problem to rectifiable curves. He showed that every rectifiable Jordan curve can be made convex, without increasing its length and without decreasing the distance between any pair of points.

What is the skill set of carpenter?

Carpentry and woodworking are skill sets that require in-depth knowledge of the tools, machines, and proper techniques to create high-quality commercial products.

What is the signature tool of a carpenter?

The hammer has been the carpenter’s signature tool for most of history. Usually attached to his belt or laid on the workbench, it’s always within reach to hit a nail. A carpenter should have a hammer that sits firmly in his hand and is comfortable to swing with elbow motion.

What size claw hammer should I use for carpentry?

I recommend going with a claw hammer with a 16 to 25 oz. head and a handle coated in plastic or rubber for a better grip. Claw hammers are the most practical for carpentry as the claw tail can pull out nails and act as a pry bar for wood boards.

How much sound does a carpenter's tool have?

On that note, the machines typically operate at very high sound levels, most over 85 dB, some reaching over 100 dB.

Which is better, circular or disk sander?

Circular sanding is better for round surfaces and round objects in general. Disk sanders are a special kind of orbital sander that is fixed to the workbench vertically. Both types of sanders have their advantages, and you should keep both handy if you work on a variety of different projects.

Why is it important to measure stencils?

Exact measurements are paramount to proper cuts and correct stencils. Your measuring toolset should be able to adjust to both small and big objects of various shapes. Also, practical math and geometry skills combined with high-quality measuring equipment are a match made in heaven.

What is a carpenter's pencil?

This pencil is quite different from ordinary graphite pencils. It’s made bigger for a more comfortable grip and a much stronger lead core to mark rough surfaces such as stone, wood, or concrete.

What is a carpenter square?

A carpenter square, also sometimes known as a framing square or speed square, is a type of carpentry tool commonly used by carpenters, builders, and other home improvement aficionados. A quick check with a carpenter square gives you the ability to measure and mark precise angled dimensions for complex projects like roofs, rafters, and stairways.

Why use a carpenter square as a saw guide?

Using your carpenter square as a saw guide makes it possible to get cleaner, more precise cuts than you could get by freehanding your saw. It also saves you the trouble of having to carry and configure a separate saw guide. Tip: Plastic squares tend to make safer saw guides than metal ones.

How to use line scriber slots?

Use the line scriber slots to mark boards lengthwise for trimming. The 1⁄4 in (0.64 cm) notches located on the interior of the triangle are used for marking lengthwise cuts on lumber. Set the fence against the edge of the board to frame it at 90 degrees and select the slot you want to use . Insert the tip of your pencil into the slot and slide the square down the board slowly to draw a line parallel to the board’s edge. This indicates where you need to cut along its length.

How to determine the pitch of a roof?

Determine roof pitch fast using a carpenter square and torpedo level. Align the pivot point with the outer edge of the roof where it meets the side of the structure, making sure the fence is facing up. Hold a torpedo level flat against the lip of the fence and adjust the height of the square until the bubble inside the level is centered. The point on the opposite leg of the square where it meets the roof’s surface will tell you the pitch.

How to use a circular saw as a guide?

Set up the square as a saw guide for a circular saw. Position the tool with the fence resting against the edge of the board. Your guide leg should be running across the board at either a 90- or 45-degree angle , depending on the cut you need to make. Slide the saw plate flush against the outer edge of the square and push the saw along to make a neat cut from one end of the board to the other.

How to measure straight lines?

1. Use the ruled leg of the square to measure straight lines. The right-angle leg perpendicular to the base is designed to double as a standard ruler—simply use it the same way you would any other ruler.

Can you cut a cut with a power planer?

If one edge of a cut is off by a small margin, it may be easier to shave it down with a power planer than to try to cut away the excess material using a saw. Anytime you're working with materials that form a right angle to one another, it's a good idea to check them with your carpenter square along with your level.

What is the carpenter rule?

Probably invented in the 16th century, the carpenter's rule was a device to help a man who could not multiply to find the area or the volume of his timber. In its original form, it gave at a glance either the length to make a square foot of a board of given width, or the length to make a cubic foot of a piece of square ...

Who invented the rule of tymber measure?

The first written account of such a rule is probably that of Leonard Digges in 1556, but whether he invented the principle of it is open to question. He says that "... the ruler of tymber measure which the most part of them hath is not made by right arte...". hinting that some such rule was already in existence.

How thick is a surveyor's rule?

Digges recommended a rule 2' long, 2" wide and 1/4" thick; there is no mention of a joint and the board and timberlines were drawn along the edges. The thickness suggests that he had wood in mind for its construction and there was a small surveyor's quadrant on the back - hence the width. A fine brass rule for surveyors with board and timber line on the face, made by Humphrey Cole in 1574, is now in the Whipple Museum, Cambridge, and is illustrated by J A Bennett in "The Divided Circle".

What is the 4th line of the 17th century rule?

The fourth line on the 17th century rule I have been describing (Fig 4) is a rarity of unknown purpose. It works like the board line, though to a constant product of 108 square inches, 3/4 square foot or the area of a foot run of 9" board. Perhaps there was already a standard 9" width softwood, later known as a "deal."

Do board and timber lines appear together?

The board and timber lines appear together on one face (Fig 3), the other face being shared by the line of inches and some other line of the maker's choice. The tables for narrow material were now concentrated, each at the start of its own line and numbered in sequence with it. Inevitably the board and timber lines had to start from opposite ends of the rule, with loss, not only of their juxtaposition with the line of inches, but the neat inverse relationship of both of them with it as well.

Who made the board and timber line?

A fine brass rule for surveyors with board and timber line on the face, made by Humphrey Cole in 1574, is now in the Whipple Museum, Cambridge, and is illustrated by J A Bennett in "The Divided Circle".

Did a carpenter ever use the rule to take actual readings of the length to make a square foot?

It is extremely doubtful whether a carpenter ever used the rule to take actual readings of the length to make a square foot or a cubic foot, because such a figure would have been quite useless to him if he was incapable of dividing it into the length of his timber by arithmetic.

Overview

The carpenter's rule problem is a discrete geometry problem, which can be stated in the following manner: Can a simple planar polygon be moved continuously to a position where all its vertices are in convex position, so that the edge lengths and simplicity are preserved along the way? A closely related problem is to show that any non-self-crossing polygonal chain can be straightened, again by a continuous transformation that preserves edge distances and avoids crossings.

Combinatorial proof

Generalization

See also

External links