Mobile home pier pads are an essential component of a mobile home's foundation system, providing a stable and level base for the home to rest upon. The installation of pier pads is a critical process that requires careful planning, precise execution, and adherence to local building codes and regulations. In this comprehensive guide, we will walk you through the step-by-step process of installing mobile home pier pads, highlighting the key considerations, best practices, and potential pitfalls to avoid.
Key Points
- Assess the site and determine the number and location of pier pads required
- Choose the correct type and size of pier pads for your mobile home
- Prepare the site and excavate holes for the pier pads
- Install the pier pads and anchor them to the ground
- Connect the pier pads to the mobile home's foundation system
- Ensure the pier pads are level and securely anchored
Pre-Installation Considerations
Before beginning the installation process, it is essential to assess the site and determine the number and location of pier pads required. This will depend on the size and weight of the mobile home, as well as the type of soil and local building codes. A typical mobile home requires between 10 to 20 pier pads, spaced 8 to 12 feet apart, depending on the load-bearing capacity of the soil. It is crucial to consult with a professional engineer or a qualified mobile home installer to determine the specific requirements for your mobile home.
Site Preparation
The site must be prepared before installing the pier pads. This involves clearing the area of any debris, vegetation, or obstructions, and grading the soil to ensure it is level and compact. The soil must be compacted to a density of at least 90% of the maximum dry density, as specified in the American Society for Testing and Materials (ASTM) standard D1557. It is also essential to check for any underground utilities, such as water or sewer lines, and to mark their locations to avoid damaging them during the installation process.
| Soil Type | Load-Bearing Capacity |
|---|---|
| Clay | 1,500-2,000 psf |
| Silt | 2,000-3,000 psf |
| Sand | 3,000-4,000 psf |
| Gravel | 4,000-5,000 psf |
Installation Process
The installation process involves excavating holes for the pier pads, installing the pier pads, and anchoring them to the ground. The holes must be dug to a depth of at least 12 inches below the frost line, and the pier pads must be placed on a compacted layer of aggregate material, such as gravel or crushed stone. The pier pads must be anchored to the ground using anchor rods or straps, and the mobile home’s foundation system must be connected to the pier pads using a system of beams and brackets.
Pier Pad Types and Sizes
There are several types of pier pads available, including concrete, steel, and plastic. Concrete pier pads are the most common type and are available in a range of sizes, from 12 to 24 inches in diameter. Steel pier pads are also available and are often used in areas with high wind loads or seismic activity. Plastic pier pads are a newer type of pier pad and are made from high-density polyethylene. They are lightweight, easy to install, and resistant to corrosion and decay.
The size of the pier pad will depend on the load-bearing capacity of the soil and the weight of the mobile home. A larger pier pad will be required for heavier mobile homes or for soils with lower load-bearing capacities. It is essential to consult with a professional engineer or a qualified mobile home installer to determine the correct size and type of pier pad for your mobile home.
What is the minimum depth for excavating holes for pier pads?
+The minimum depth for excavating holes for pier pads is 12 inches below the frost line.
What type of aggregate material is recommended for use under pier pads?
+Gravel or crushed stone is recommended for use under pier pads, as it provides a stable and compacted base for the pier pads.
How often should pier pads be inspected and maintained?
+Pier pads should be inspected and maintained annually to ensure they remain level and securely anchored.
In conclusion, the installation of mobile home pier pads is a critical process that requires careful planning, precise execution, and adherence to local building codes and regulations. By following the guidelines outlined in this guide, you can ensure that your mobile home is supported by a stable and level foundation, providing a safe and secure living environment for you and your family. Remember to always consult with a professional engineer or a qualified mobile home installer to determine the specific requirements for your mobile home, and to ensure that the installation process is carried out correctly and safely.
