If it is necessary to compare or just to measure only one parameter of material - its length, then apply the conventional unit called "running meter. Usual it differs in nothing from meter, likewise including hundred centimeters, and is used generally to emphasize that all other parameters (width, the weight, production material, a form, etc.) at measurements are ignored. However sometimes nevertheless there is a need to restore value and other parameters (for example, weight), knowing only length in running meters.
Instruction
1. If the weight of one running meter products is known to you (for example, pipes, fittings, boards, fabrics, etc.), then it will be rather simple to transfer initial size to tons. If necessary it is possible just to weigh it independently. It is not obligatory to do it with a product of meter length - if there is an opportunity, then it is enough to determine weight, for example, of 20 running centimeters, and then to increase it by five. Or on the contrary, knowing the weight of a multimeter product, divide it into the number of these meters. Having received values for one running meter, increase it by quantity necessary to you.
2. The weight of many products can be determined on their marking - for example, it belongs to metal rolling. Such marking is applied on products or entered in the documents accompanying them and has to conform to the established state standards. Knowing it, it is possible to find out the weight of each running meter according to the corresponding tables and to increase it by number necessary to you. For example, the numbers assigned to different products of metal rolling, and corresponding to them weight parameters can be found in the table placed on this page: http://unixmet.narod.ru/weight.htm.
3. If the weight of one meter is unknown, but there are data on material of which the product interesting you and also its sizes is made, then begin with the scoping occupied by each running meter. Depending on a product form for this purpose it is necessary to apply different formulas. For example, the section of a metal bar has the rectangle form therefore for scoping increase its width by height, and length at any form is accepted equal to one meter.
4. For clarification of volume of a metal pipe it is necessary to know its external and internal diameters - increase Pi's number by the difference of the squared bigger and smaller radiuses, and multiply the received value by length of one meter. Having received value of volume, increase it by the specific weight of material - it can be found in the corresponding reference books. So you will calculate the weight of each running meter and obtain the same basic data that are described in the previous step. Just it will be necessary to increase the received value by the number of meters.