Example: Measure a space on your wall. Not Helpful 0 Helpful 7. Not Helpful 4 Helpful
The third piece can be any length, it will be the handle for the antenna, so give yourself about a foot or foot and a half. Whatever is comfortable. Fit the pieces of PVC tube together with the crosses and the T.
You may PVC cement if you wish to make the connections permanent, otherwise dry fitting them will be fine. These are measured from the center points of the connectors. Make adjustment if necessary. Cut the tape measure into four pieces. These are the reflector and director elements for your yagi. On the two driven element pieces, sand or grind away the paint from one corner.
This is where we will solder the the coax and the hairpin match. Apply flux and use your soldering iron to tin this area. Assemble the director and reflector elements. Making sure they are centered, use the hose clamps to attach the elements to the T and Cross connectors. Assemble the driven elements. Using the hose clamps, attach each half of the driven elements to the Cross connector. There should be a one inch gap between the two pieces. Attach the hairpin match. Solder this to the tinned ends of the driven element.
Attach the coax. Find the nearest inch before this point. Then, find the nearest half-inch before this point. Then, the nearest quarter-inch, and so on. Add up your inches and fractions of inches until you have an accurate measurement. This is a lot easier than it sounds — see below for an example. Let's say that we've measured past the one-inch mark, past one quarter-inch mark, and past one eighth-inch mark.
If you need help, see our article on how to add fractions with unlike denominators. Use the big, numbered markings for centimetres. On most metric measuring tapes, centimetres are the most prominent markings. Centimetres are usually labeled with large lines and, next to each line, a number. As with inches, the line marks each centimetre, not the number itself. After each metre, the centimetre markings may start over again from zero or continue counting. This varies from measuring tape to measuring tape.
Use the smaller markings between centimetres for 0. Some but not all metric measuring tapes will have medium-sized marks evenly spaced between each centimetre mark. These mark half-centimetres. These marks are usually not labelled with a number. For this reason, it's usually fine to refer to half-centimetre markings in decimal terms i. Use the small, densely-packed markings for millimetres.
The small, tight, narrow lines between centimetre markings represent millimetres or one-tenth-centimetres. There are ten millimetres in a centimetre and, thus, one thousand in a metre. If your measuring tape doesn't have 0. Add the centimetre segments to determine the total length. To measure with a metric measuring tape, first find the nearest centimetre before the distance you're measuring, then the nearest millimetre.
You can use a 0. Your measurement in centimetres will be a decimal where the tenths place is indicated by the millimetre marking. For example, see below:  X Research source Let's say that we measure past the 33 centimetre mark to the sixth millimetre marking. For example, let's say that we want the answer above in metres. In this case, since there are centimetres in one metre, we could use a conversion factor like this: Method 2 of Retractable Tape.
Catch the hooked end on one side of the object you're measuring. If you're using a retractable tape measure the kind that comes in a small metal or plastic box that automatically sucks the tape back up when you're done with it note that the end of the tape will almost always have a small metal notch at the zero mark. This is useful for holding the tape in the right place as you measure, so you may want to start by catching it on the edge of the object you're measuring.
On the other hand, if you're measuring something that can't be latched on to like, for instance, the distance across a door frame , just press this metal notch into one side of the object. Stretch the tape across your object.
With the zero mark in place, pull back on the box to let more tape out. You can use one hand or a friend to hold the end of the tape in place as you pull it back. Let tape out until it stretches all the way across the distance you're measuring. Try to keep the tape straight as you do this — if you let it sag which is easy to do if you're measuring long distances , the results you get will be skewed. Take a reading directly from the tape.
Now, look at the point where the tape meets the end of the thing you're measuring. The nearest number below the end of the tape is your number of units you're measuring and the markings between this number and the one above it correspond to fractions of the unit. For example, if you are measuring across the front of your dresser and the edge of the dresser lines up right after the 24 inch marking, this means that your dresser is between 24 and 25 inches wide.
You can also try putting a kink in the tape, then lining up this kink with the edge of what you're measuring. This is handy in certain situations, like for instance, when you're measuring into a tight corner. Use the lock switch to keep the tape at the same length. Most retractable tape measures will have a button or sliding switch that, when pressed, keeps the tape measure from being sucked back in. Some even lock automatically.
For instance, the lock feature is useful for: Quickly seeing which of two objects is bigger Seeing whether something will fit through a certain space Keeping the tape available for multiple quick measurements Keeping a certain distance "handy" to avoid having to re-measure.
Hold one end of the tape down at the start of your distance. A manual tape measure which looks a little like a long, skinny ribbon or a ruler made out of flexible material lacks some of the convenient features of a modern retractable tape measure, but with the proper technique, it works just as well. To start taking a measurement, grab the "zero" end and line it up with the start of the object or length you want to measure. Part of the problem with manual tape measures is that they're most useful for measuring only short differences because you have to be able to hold the zero end in place while you move the other end into position.
Thus, most manual tapes won't be much longer than the human arm span. If you need to measure beyond your reach, you can try keeping the zero end of your tape measure in place with a weight or getting a friend to help. Stretch the tape across your distance. Now, take the slack of the object and lay it in a straight line across the object or distance you want to measure.
Be sure to keep the tape tight to ensure an accurate measurement, but don't stretch it — most modern measuring tapes are made out of semi-flexible plastic. Just as you would with a retractable tape measure, look for the spot where the end of the object or distance you're measuring lines up with the tape measure.
The distance indicated on the tape measure at this point is the distance you've measured. For instance, let's say you hold one end of a tape measure in the tips of your fingers and stretch the other end all the way to the crook of your armpit to determine how long your arm is. If the tape measure stretches exactly halfway between the 27 and 28 inch markings, this means that your arm is If measuring around a round object, pinch the tape where it overlaps.
One advantage of ribbon-style tape measures over retractable tape measures is that their flexibility allows them to measure around objects. To do this, place the zero end of the tape on the object, wrap the tape all the way around it in as straight of line as possible, and note the point where the tape measure first passes the zero marking once again.
This point is the distance around your object. For example, if you want to find the distance around your wrist, place the zero end of the tape measure on top of your wrist, wrap the slack around and underneath, then line it up with the zero end on top. If it is, for instance, six inches at this point, then your wrist has a circumference of about six inches. Why is there an arrow marking on 16, 32, 48, etc. This a common layout measurement for various items used in building homes and other structures.
It is also a common divisor for materials such as plywood 4' x 8' , ceiling heights, and common lumber lengths. Not Helpful 3 Helpful Square meters is a unit of measure for area - that is bi-dimensional spaces - whereas feet are used to measure distance, so there's no possible equivalence. Not Helpful 4 Helpful A prime apostrophe is used for feet, while a double prime quotation mark is used for inches.
For fractions of an inch, simply put the fraction after the whole number for inches. Not Helpful 7 Helpful Not Helpful 6 Helpful Not Helpful 16 Helpful Is the blade or hook at the end of a measuring tape included in the measurement? Not Helpful 2 Helpful Not Helpful 5 Helpful It depends on the tape measure itself, they come in different lengths. Not Helpful 8 Helpful Exactly where is the measurement taken? For a 12 inch measurement, do I mark the left edge of the 12" gradation, the center, or the right edge?
The measurement is technically taken at the center of the mark; however, if you need measurements to that precision, I would recommend using something a bit more accurate, such as calipers. Not Helpful 2 Helpful 5. Not Helpful 0 Helpful 7. Unanswered Questions. How do I read feet on a measuring tape? What do the black lines in between the inch mean on a measuring tape? Include your email address to get a message when this question is answered. With contractor measuring tapes, used for measuring large areas, you often cannot get a measurement using just the tape, as the body or case of the measuring tape gets in the way.
That's why these bodies are carefully designed and marked to a certain width. Look on the case body for the width indicator. Many are 3". To measure a room from one corner to the other:  X Research source Lay the tape on the floor and hook the end into one corner of the room. Pull out the tape along the floor. When you reach the other corner push the butt of the tape case into the corner the butt or back of the case has been flattened for this purpose.
Take your measurement from the tape and then add the 3" for the complete width. Example: Measure a space on your wall. Place the front of the tape at the start point and extend it until after you reach the stop point. Look at the tape and see the last number before the stop point, for example, After the number 17, count four lines, noticing that you stop on the third longest line.
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