First, we would determine the height of the tree from the eye level up, height A in the illustration, marked in fuchsia. Following that, we will calculate the height from the eye level and down to the base of the tree. This height B is marked in yellow on the illustration.
We will then add the two heights together to get the overall height. Once the height is known, the diameter of the tree is measured. Sometimes tools such as dendrometers are used to do this. Generally, the diameter is calculated not at the base of the tree near the ground, but at the height of 4.
If the tree grows on an incline, then this height is measured from the uphill side of the tree. This value is known as diameter at breast height because 4. It is often written as DBH. With this information, one can then estimate the volume using formulas for volume calculations of simple geometric objects. There are also tables available that provide the volume for a given height and DBH. There are many different units for measuring the volume of lumber — the choice depends on the intended use of the lumber and the length of each piece of wood.
Larger pieces of 2. Lumber undergoes many changes during the processing from the initial rough-green stage, especially as it is being dried and cut. Before cutting, the wood is scaled. Scaling is a process of determining what amount of wood can be cut into sawlogs or boards, and how much usable wood will be yielded. The yield is estimated using one of the many rules about cutting a log, and the choice of the rule depends on the local legislation, the intended use for the lumber, and on what rule the purchaser and the seller can agree on.
When the wood is later cut, the surface of logs or boards is made more uniform by removing the uneven parts and the volume diminishes as a result. Scaling provides the estimate of usable wood while considering these reductions in volume. You can see a very simple example of scaling in this illustration. Here one log is scaled in two different ways. Blue lines represent the cut, brown is the bark that will be discarded, pink is the rest of the discarded wood, and yellow are the logs after scaling.
In the picture on the left, the scaling is more economical, rendering two separate logs, A and B. In the picture on the right, the total volume of log C is smaller, but this log is longer. Sometimes longer logs are needed and loss in volume is justified. It is important to note that if the estimate is made without cutting the logs into boards, there is a possibility that the volume of usable wood is even smaller, once cut, due to the defects of the wood.
That is why some buyers of uncut wood scrutinize it carefully to detect any potential defects and negotiate a price reduction if they doubt the quality. Therefore, when considering measurements for lumber we have to keep in mind at what stage the volume of the lumber was measured. Some volume measurement units can only be used with wood, processed in a specific way, for example for pre-cut wood. One could calculate the volume of lumber cut into boards by multiplying their width by the height and by the length.
It is important to note, however, that the specified dimensions often refer to the nominal size, not the actual size of the boards. This is especially true for the width and the height of a board. For example, the actual size of a 4 inches by 6 inches board is 3. This is because the nominal sizes are for the boards only processed initially, but the drying of the boards and the final processing to make them smooth reduces the nominal size.
For dimensions less than 2 inches, this difference is 0. When calculating the volume using the dimensions of the lumber, it is important to use the actual dimensions, not the nominal ones. Board foot is a unit generally used in the USA and Canada for uncut wood, but with the assumption that the wood is cut into boards of specified height and width, determined by the selected rule. Characteristics and Signs. Complains and Signs. Causes and Symptoms. Browse Abbreviations.
Get instant explanation for any acronym or abbreviation that hits you anywhere on the web! Two clicks install ». Download Close. Rate it:. When you are converting lumber volume, you need a Thousand Board Feet to Cubic Meter converter that is elaborate and still easy to use.
Converting MFBM to Cubic Meter is easy, for you only have to select the units first and the value you want to convert. Units Converters. Cubic Inch Smallest. Note that we have Fahrenheit as the biggest unit for length while Per Degree Celsius is the smallest one. In the length measurement, first choose FBM from the left dropdown and MFBM from the right dropdown, enter the value you want to convert and click on 'convert'.
Units of measurement use the International System of Units, better known as SI units, which provide a standard for measuring the physical properties of matter.
Measurement like lumber volume finds its use in a number of places right from education to industrial usage. Be it buying grocery or cooking, units play a vital role in our daily life; and hence their conversions.
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