start Swell and Yield Factors

Use swell and also yield components to estimate just how much dust swells when it is excavated from its organic state top top a job site, and also how much dirt friend will require when you compact it on a task site.

You are watching: Bank cubic yards to loose cubic yards

ProContractor considers organic dirt in terms of financial institution Cubic Yards (BCY) or financial institution Cubic meter (BM3). Once you dig deep into or eliminate the dust from its normal state, that swells and also becomes loose Cubic Yards (LCY) or loosened Cubic meter (LM3). Once you replace and also compact the dirt, it i do not care Compacted Cubic Yards (CCY) or Compacted Cubic meters (CM3).

One the the most important concepts to recognize is the you must constantly work with the exact same units of measurement. One cubic yard that is in the floor of a project site (BCY) will be much more than one cubic yard when you dig deep into it out of the soil (LCY). As soon as you move this dust to an additional location top top the job site and also compact it in the ground (CCY), that will normally be much less than a cubic yard.

For example, if you dig deep into 1.0 BCY of dirt from the ground, it might swell 25%. To recognize the volume of dust you will have to haul to one more location on the site or off the site, you would certainly multiply the cubic yard by a swell Factor, which in this instance would it is in 1.25. This would convert the 1.0 financial institution Cubic yard (BCY) come 1.25 loose Cubic Yards (LCY).

According come the calculation of the job, friend now recognize you will actually have to haul this 1.25 LCY to an additional location top top the job site to usage as compacted fill material. This way that the loose Cubic Yards will become Compacted Cubic Yards (CCY). To calculation this, you multiply the loosened Cubic Yard worth by the productivity Factor. For example, the 1.25 LCY we calculated in the previous example might need to be compacted through 10% once filled right into the soil to transform the unit come Compacted Cubic Yards. To calculate this, you would multiply 1.25 LCY through 1.1, which equates to 1.38 loosened Cubic Yards to same one Compacted Cubic Yard.

If friend don"t understand the yield aspect for the dust on a project site, usage the yield calculator in ProContractor to identify what the yield factor based upon the swollen factor, original density, and also design density. The basic equation is:


Swell factors variety between 0.5 and also 4.00, and also yield factors can range from 1.00 come 4.00. You can apply swell and also yield determinants to every class of the job.

To collection default swell and also yield factors, select the suitable boring attributes. See personalizing Boring characteristics for an ext information.

If you adjust the swollen or yield factor for a material, the aspect is updated everywhere the product is used.

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To open up a project in the regulate Earthwork estimates screen, click Estimating > Earthwork > regulate Earthwork estimates in the All work pane. Click open up Existing Job. Then pick the task you want to open, and also click OK.
To use swell/yield factors…
open a project in the regulate Earthwork approximates screen. select the an overview tab, if that is not currently active. Click information
~ above the speedbar. Pick the factor you want to change in the Swell/Yield columns. Friend can readjust both the swell and also yield for the selected material. In the puffy field, click to rise or to decrease the swell aspect for the material. In the yield field, click to increase or to decrease the yield factor for the material. If needed, you can calculate the yield based on the swell, by law the following:Click Calc.In the Swell aspect field, click to rise or diminish the swell element for the material.In the Original density field, click to rise or decrease the thickness percentage for the initial material.In the style Density field, click to increase or diminish the thickness percentage for the last material.Click OK. Click OK. The quantities are recalculated based upon the brand-new swell/yield factor and also appear in the changed Quantity column.