Lesson on - Dot Grid Use

Dr. Dennis Burson Author

09/05/2024 Added

5 Plays

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Measuring the size of a beef carcass ribeye using a dot matrix grid is a useful tool to assist with the calculation of yield grades for beef carcasses. Many methods can be used to determine ribeye size in square inches, however, the use of the dot matrix grid is a simple and useful method to assist students with determination of ribeye size on a beef carcass.

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[00:00:00.000]Measuring the size of a beef carcass ribeye using a dot matrix grid is a useful tool to assist with the calculation of yield grades and determination of ribeye size for beef carcasses.
[00:00:16.000]Many methods can be used to determine the ribeye size in square inches.
[00:00:20.000]However, the use of the dot matrix grid is a simple and useful method to assist students with determining ribeye size on a beef carcass.
[00:00:34.000]The beef ribeye grid is pictured on this slide.
[00:00:37.000]It is a clear plastic card that can be placed on a beef carcass to determine the size in square inches.
[00:00:43.000]The grid has several squares with a dot in the middle.
[00:00:47.000]Each dot represents 0.1 centimeters.
[00:00:50.000]Each dot represents 0.1 square inches and a total of 10 dots will represent 1 square inch.
[00:00:56.000]When the grid is placed on a beef ribeye, if the dot on the grid is touching the lean of the ribeye, then it is counted as 0.1 square inches of ribeye size.
[00:01:08.000]We can simply count the total number of dots touching the lean and determine the size of the ribeye.
[00:01:17.000]This grid has areas with bold lines.
[00:01:20.000]The square area in the middle with an 8 in the bold line surrounds 80 dots, or the 80 square inches in size.
[00:01:30.000]When the grid is placed on a ribeye, if all the dots in this box are touching the lean of the ribeye, then this represents 8 square inches of ribeye size.
[00:01:42.000]In addition, two areas with an additional 10 dots are surrounded with bold lines.
[00:01:49.000]This means to add an additional 1 square inch to the ribeye size for each square.
[00:01:57.000]If the grid is placed on the ribeye and the dots in the 8 square box and the two boxes with the 10 dots each are touching the lean of the ribeye, then the square would cover a total of 10 square inches.
[00:02:13.000]Because the ribeye is an oblong shape and not perfectly square,
[00:02:18.000]the pyramids are located on the right and left of the 8 square inch box on the grid.
[00:02:24.000]The smaller pyramid on the right represents 1 square inch and the larger pyramid on the left represents 2 square inches.
[00:02:33.000]When the grid is placed on the ribeye, if the boxes and the
[00:02:36.880]pyramids are all touching the lean of the rib eye then the square inches in the boxes and the
[00:02:42.860]pyramids representing represents 13 square inches total here is a picture of the placement of the
[00:02:53.420]grid on a rib eye of a beef carcass if possible placing the bold line on the grid near the edge
[00:03:00.860]of the rib eye next to the bone is helpful placing the grid so that most of the rib eye
[00:03:06.800]is covered by the thick line boxes and pyramids on the grid also is helpful after placement of
[00:03:14.340]the grid on the edge of the rib eye you can adjust the grid left or right to obtain the
[00:03:18.540]best coverage for the two pyramids on the grid the grid can even be flipped over to
[00:03:24.800]provide the best coverage of the dots in the two pyramids
[00:03:29.740]for this example almost all of the boxes have lean touching the dots except for the one inch
[00:03:40.340]square box on top the area in the remaining boxes and pyramids totaled to 12 square inches
[00:03:47.860]eight inches for the center box one square inch in the box near next to the eight inch
[00:03:54.100]box on the top one square inch in the small pyramid and two square inches
[00:03:59.620]in the larger pyramid it to total to 12 square inches however within the 12 square inches two
[00:04:08.560]of the dots are not touching the lean but are touching fat or connective tissue seams
[00:04:13.740]from the edges of the ribeye therefore the dots that the boxes and the pyramids cover
[00:04:19.820]is equal to 11.8 square inches of ribeye the next step is to count the dots that that are in
[00:04:29.500]the lean but are outside of the boxes in the pyramids covering the 11.8 square inches of
[00:04:34.620]ribeye there are a total of 46 dots on the outside however they are still touching lean
[00:04:42.700]within the ribeye the 46 dots equal four point six square inches of ribeye therefore the total
[00:04:50.720]of the eleven point eight square inches inside the boxes and the pyramids plus the four point six in
[00:04:59.380]outside totals the size of this ribeye to sixteen point four square inches
[00:05:05.380]you
[00:05:07.440]you
[00:05:09.500]Thank you.

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Lesson on - Dot Grid Use

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