Xi2 and Xi2-24 Foundation Systems

When you install a manufactured or modular home, keeping it safe and stable is crucial — especially against wind, shifting ground, or long-term settling. That’s where Tie Down’s Xi2 and Xi2-24 foundation systems come in. These systems anchor the home solidly to the ground, combining safety, strength, and easier installation compared to older tie-down methods.

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General Information about Xi2 and Xi2-24 systems

The Xi2 Foundation System holds the home firmly in place against three forces: Uplift– wind trying to lift the home from underneath; Lateral movement– side-to-side shifting caused by strong winds or ground pressure; and Longitudinal movement– front-to-back shifting when forces hit the ends of the home. Instead of using dozens of individual frame ties and stabilizer plates, these systems use struts- rigid steel bars that connect the home’s steel frame directly to the ground pads or concrete. These struts act like braces, locking the home in position from multiple directions. In most cases, these systems replace traditional end frame ties and lateral ties, reducing clutter under the home and speeding up setup.

Wind Zone Information

Xi2-24 Systems for Soil

This system mounts directly on the ground or gravel and is ideal where concrete pads aren’t used. Works in any soil rated “4B” (175-275 lbs) or better. Can handle homes up to 48 inches above grade. Struts attach to the home’s I-beams and base pads using heavy-duty bolts and washers. Angled steel struts (between 25° – 50° from horizontal) keep the home steady front-to-back and side-to-side. Only two to three Xi2 systems are typically needed, depending on the home’s length and roof pitch. For higher wind zones (II & III), extra vertical anchors and bracing are added for stronger protection.

Important: Here’s what you will need depending on your home size (Wind Zone I)-

For Doublewides up to 76′ Length

(2) Xi2-24 Lateral Systems, (2) Xi2-24 Longitudinal Systems, 4 soil anchors, 4 universal frame ties, 4 tension split bolts with nuts, and 2 rim joist bracket kits.

Rim Joist Uplift Hook-Up Kits

Xi2 Systems for Concrete

This system mounts on dry or wet concrete. Can handle homes up to 48 inches above grade. Struts attach to the home’s I-beams using heavy-duty bolts and washers. Angled steel struts (between 25° – 50° from horizontal) keep the home steady front-to-back and side-to-side. Only two to three Xi2 systems are typically needed, depending on the home’s length and roof pitch. For higher wind zones (II & III), extra vertical anchors and bracing are added for stronger protection.

Important: Here’s what you will need depending on your home size (Wind Zone I)-

For Doublewides up to 76′ Length

(2) Xi2-24 Lateral Systems, (2) Xi2-24 Longitudinal Systems, 4 soil anchors, 4 universal frame ties, 4 tension split bolts with nutss, and 2 rim joist bracket kits.

Xi2 Systems for Asphalt

Normally 2 systems are needed for a unit but more may be required (Check out the resources below) To complete one asphalt system you will need to order a base bracket with hardware (for use with either concrete blocks or steel piers), a lateral bar, a longitudinal bar, and longitudinal hardware specific to the type of framework you may have underneath. 

Longitudinal Strut

(One required for a standard I-Beam framework, two required for a perimeter beam framework)

One of the following three longitudinal hardware kits is required, based upon the type of framework.