Every cubic yard matters when investing in concrete for a construction project because concrete is one of the most significant expenses in any building project. How can you tell if you’re getting the amount of concrete you’re paying for?
The most reliable way to verify concrete quantity is to measure the pour volume using a certified batch ticket from the supplier and compare it to the actual dimensions of your project using the formula length × width × depth.
While this basic measurement approach works for simple projects, several other factors can affect concrete volume calculation and delivery verification that you’ll want to know about – especially for complex projects or when dealing with multiple concrete trucks.
What Other Factors Affect Concrete Volume Calculations?
Several variables can impact the actual volume of concrete you receive versus what you calculate. Settlement and waste during the pour typically result in 10% more concrete needed than theoretical calculations suggest. Additionally, ground conditions, formwork bulging, and over-excavation can all increase the required volume.
Temperature and moisture conditions at your job site can also affect concrete volume. Hot weather causes concrete to expand slightly, while cold weather causes it to contract. These variations might seem minor, but they can add up in large projects.
How Can You Verify Concrete Delivery When Using Multiple Trucks?
Each concrete truck should provide a batch ticket showing the exact volume loaded. Keep all tickets and add them up to verify the total delivery matches your order. It’s crucial to check each ticket as trucks arrive, rather than waiting until the end of the project.
Make sure someone is designated to collect and verify tickets throughout the delivery process. If there’s a discrepancy, it’s much easier to address it immediately with the driver present than to dispute it later.
What Should You Do If The Concrete Delivery Doesn’t Match Your Order?
Document any discrepancies immediately by taking photos and noting the specific details on the delivery tickets. Contact your supplier right away – most reputable companies will work to resolve the issue quickly if you have proper documentation.
Consider having a backup plan for both under-delivery and over-delivery scenarios. For under-delivery, know your supplier’s policy for supplemental loads. For over-delivery, have a designated area where excess concrete can be poured rather than paying for concrete you don’t need.
What Are The Warning Signs Of A Dishonest Concrete Supplier?
Red flags include suppliers who resist providing detailed batch tickets or pressure you to sign delivery confirmations before you’ve verified the quantity. Be wary of companies that consistently deliver less concrete than ordered and blame it on “normal shrinkage” or other vague explanations.
Another warning sign is when suppliers can’t or won’t explain their volume calculation methods. Reputable companies should be transparent about their measurements and willing to walk you through their processes.
How Can You Protect Yourself Before The Concrete Delivery?
Get everything in writing before the delivery date, including the exact volume ordered, the mix design, and the price per cubic yard. Established concrete building supply businesses should have no problem providing this documentation and explaining their measurement methods.
Consider having an independent inspector or experienced contractor present during delivery and pouring, especially for large projects. They can help verify quantities and catch any issues early. It’s also wise to establish clear communication channels with your supplier and agree on a protocol for handling any discrepancies before they arise.
Remember to document your volume calculations and share them with your supplier beforehand. This creates a clear record of expectations and helps prevent misunderstandings about the quantity needed.
Taking Action To Protect Your Concrete Investment
Before your next concrete delivery, create a detailed verification plan that includes designating a team member to collect batch tickets, establishing measurement checkpoints, and documenting your communication with the supplier. Having this system in place before the first truck arrives will help ensure you receive exactly what you’re paying for and give you the documentation needed if any issues arise.
