What are the red diamonds on a tape measure for?

The diamond marks on tape rule blades are for spacing these engineered floor joists in new construction. … If you multiply these dimensions by 8, 6, 5, and 4, respectively, you’ll find each comes to 96”, the length of the plywood panels used for sub-flooring.

What is the red dot on a tape measure for?

The red indicates 16-inch-on-center spacing. This is a common framing spacing for wall studs, floor joists and common roof rafters. If you decide to space framing at 24-inch centers, the red marks will be at every other foot marking on the tape measure.

How do you use diamonds on a tape measure?

Starting at the 19.2-inch mark, the black diamond helps you find the center of the first stud. The next black diamond is 19.2 inches away from the first stud (38.4 inches from the beginning of the tape measure), and the diamonds go all the way to the 96-inch mark, or 8 feet.

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What is M on a measuring tape?

On many tapes (but by no means all) you will find a small red rectangle with the letter M printed inside followed by a number. The number simply denotes the year that the blade was stamped as conforming to the Measuring Instruments Directive. On the whole this will also be the year in which that tape was manufactured.

Why are tape measures yellow?

Tape measures often have black and red measurements on a yellow background as this is the optimal color combination for readability.

What do the black diamonds on a tape measure mean?

The black diamonds which appear every 19 3/16” on metal tape measures are for spacing I-beam “timbers.” Several wood-product manufacturers offer I-beam “timbers” as a substitute for solid lumber floor joists. The diamond marks on tape rule blades are for spacing these engineered floor joists in new construction.

What does the arrow on a tape measure mean?

There’s a small arrow next to the gas gauge that you’ve probably seen a million times and not really thought about. It actually indicates which side of your car the gas tank is on.

What is the maximum length of a long line tape?

What is the maximum length of a tape measure? The most common lengths for measuring tape are 12 feet, 25 feet, or 100 feet.

What is the smallest line on a tape measure?

The smallest marks on a tape indicate one millimeter or 1/10th of a centimeter. The large, bold markings on a metric tape measure indicate centimeters. The long mark in the center indicates a half-centimeter.

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Can you measure your shoe size with a tape measure?

Find your shoe size

Using a tape measure or ruler, measure the distance from the back of your heel to the end of your longest toe (in mm).

Which side is CM on a measuring tape?

The tape, also known as the blade, is what you use to get your measurement. Most tapes feature imperial units (inches) on the top row and metric units (centimeters) on the bottom.

How many inches is a ruler?

A ruler is made up of 12 inch marks. These are typically the numbered marks on the ruler and are denoted by the longest lines on the ruler. For example, if you need to measure a nail, place one end directly on the left side of the ruler.

What is the most accurate tape measure?

Class 1 tapes are the most accurate tape measures on the market. Ideal for precision trades and sensitive industries, they also delivery great value for money.

Are tape measures accurate?

However, you do have to avoid using different tape measures if you want the random measurement error to be the smallest. Not all tape measures are equally accurate! … It is measured and marked with an accuracy class. The accuracy class of a tape measure indicates its instrumental bias within prescribed limits.