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Calculate Class 5 Base Material Quantity and Cost

3:20
18:23
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How to Bid Excavating and Grading

What happens here

Determine the quantity of Class 5 base material needed. Using the dimensions of the area (210 lineal feet x 105 lineal feet) and a planned depth of 0.5 feet (6 inches), calculate the volume in cubic feet: 210 ft * 105 ft * 0.5 ft = 11,025 cubic feet. Convert cubic feet to cubic yards by dividing by 27: 11,025 cubic feet / 27 = 408.33 cubic yards. Finally, convert cubic yards to tons by multiplying by a factor of 1.36 (approximate conversion factor for aggregate): 408.33 cubic yards * 1.36 = 555.33 tons. Rounding up, this project requires 561 tons of recycled Class 5 base material. The proposal states this as 561 tons at a cost of $7,854 (which implies a price of $14 per ton including delivery and profit).

Goal: Determine the required volume and cost of Class 5 base material.

Tools and materials

  • Calculator — Calculating material volumes and conversions
  • Recycled Class 5 Base Material — Creating the base layer of the parking lot

What they say

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you on that back at the office all right before we get too crazy deep into the numbers I'm going to show you the actual proposal that I've turned into this company at this point when I want you to do is pause the video and look carefully over these numbers this is the actual proposal that they receive and you can see how I've broken it down into four separate categories okay and what that does is that gives me confidence in my numbers but it also clarifies the proposal to the uh to the customer and it helps them wrap their head around it you want to avoid that lumps some magic mystery number because it doesn't really give the customer any confidence in what you're doing and what they're spending tens of thousands of dollars on so let's actually break down how we do the calculations now on the first step of this proposal we have grade the subbase and prep for new base material that's strictly labor that's strictly going into that tannish rock clayy subsoil and creating a crown and I want to explain to you what a crown on a parking lot is the park parking lot currently looks more like this kind of flat nothing what we want to do is we want to create a peak in the middle and then we want the parking lot to gently roll to both sides so when water comes down it will run away from the parking lot as quickly as possible your road almost every road you drive on will have a crown on it and we want to create that in the parking lots we want to get the water to run away we don't want Ming or ponding this is how you do it this this site that you just seen was a perfect example of an easy one to create the crown on but that starts with the subbase so that starts with creating that Perfect Pitch going down in way to both sides the next step on this case because we're not doing a soil correction because we don't have perfect conditions to just lay class 5 down we were going to be putting down filters fabric remember we talked about that and we needed to know how many linear feet or actually technically how many square feet a Filter Fabric remember those numbers we went over it was 210 22,50 Square ft that is the number we need for the Filter Fabric then we've got a price all Filter Fabric we got to make a phone call and say hey I need 22,50 ft of Filter Fabric how much is that going to cost me in this case it was $1.75 was it a oh no it was $175 per roll we needed 10 rolls I apologize um and so we knew we had $1,750 just in Filter Fabric now you've got to get those rolls…

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