---
title: "compacted base: Definition and Meaning | NPSA"
description: "A compacted base is a layer of soil or crushed stone that has been pressed down so it is firm and stable."
url: https://npsa.preview.multisites.ai/glossary/compacted-base
publisher: National Portable Storage Association (NPSA)
phone: "(816) 960-6552"
email: info@npsa.org
---

Site and permits

# compacted base

A compacted base is a layer of soil or crushed stone that has been pressed down so it is firm and stable. It sits under a container to carry the weight and resist settling. Conexwest notes that some sites need compaction, stone, piers or professional soil review before placement.

## Why it matters

Soft ground can let one corner of a container sink, which can twist the frame and make the doors hard to open. Compacting the base lowers that risk. Equipment such as a plate compactor or roller does the work, and the soil must be graded first. A common mistake is to think a lawn is firm enough. Grass over soft soil often is not, and wet weather makes it worse. Operators may refuse a drop if the ground looks unsafe for the truck. Customers should ask what base the provider expects for their unit and their soil.

[Read: How to prepare your site for a storage container delivery](https://npsa.preview.multisites.ai/guides/site-preparation-for-container-delivery)

Definition source: [conexwest.com](https://www.conexwest.com/blog/best-materials-put-under-shipping-containers)

## Related terms

[### gravel pad A gravel pad is a prepared base of crushed stone or gravel placed on the ground for a container to sit on. Conexwest calls a compacted gravel pad one of the most practical base options for many storage containers because it improves drainage and is generally easier to install than concrete.](https://npsa.preview.multisites.ai/glossary/gravel-pad)[### level ground Level ground is a flat, firm surface without noticeable slope or dips. XCaliber Container advises that a site for a container should have level, firm ground free of pooling water and with few tree roots. Level ground helps placement and prevents tilting or sinking.](https://npsa.preview.multisites.ai/glossary/level-ground)[### site preparation Site preparation is the work done on a spot before a container arrives. It includes clearing the access path, checking overhead room, making the ground firm and fairly level, and sometimes adding a gravel or stone base. The goal is a safe drop and a unit that sits flat.](https://npsa.preview.multisites.ai/glossary/site-preparation)[### delivery access Delivery access is the space and route a truck needs to reach the drop spot. It includes the road, driveway, gates, turning room and overhead clearance. XCaliber Container gives a guide of about 10 feet of width on each side of the container and 13 feet of overhead clearance.](https://npsa.preview.multisites.ai/glossary/delivery-access)[### container jack A container jack is a portable lifting device that raises one end or corner of a container. It lets crews lift a box off the ground, level it or slide wheels or skids under it. Hydraulic jack sets are common.](https://npsa.preview.multisites.ai/glossary/container-jack)

[All 220 terms](https://npsa.preview.multisites.ai/glossary)

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