Mobile Home Tie-Down & Anchor Calculator

Yes, all of it, from Garden City to Green Sea. HUD's wind zone map puts the entire coastal band of South Carolina in Wind Zone II, which is rated for 100 mph. Being forty-five minutes inland at Aynor does not change the requirement, and a home built to Wind Zone I standards and moved here is under-anchored by design.

The federal installation standard at 24 CFR 3285.402. Wind Zone II diagonal tie spacing falls on a maximum of roughly 4 to 8 feet depending on home width and where the strap attaches, a strap has to sit within 2 feet of each end of the home, and every Wind Zone II diagonal tie also carries a vertical tie. South Carolina requires each anchor and tie to hold a 3,150-pound working load and survive a 4,725-pound overload.

No, and be careful with anyone who says otherwise. The binding figure is the spacing table in your home's own installation manual, which accounts for its width, roof pitch, strap attachment height, and soil class. This planner gives you the range that manual will fall inside, which is enough to tell whether what is under your home now is obviously short. In South Carolina the anchoring itself has to be installed by a licensed manufactured home installer.

It counts against you. A slack strap transfers no load, and a home that has settled always leaves its straps slack, because the frame dropped and the strap did not. Count is the easy half. Tension and condition are the half that decides what happens in a storm, and near the water corrosion at the ground line takes anchors out while they still look installed.

$600 to $3,500, quoted after an inspection. The spread is that wide because it depends on how many anchors go in, whether the existing ones can be re-tensioned or have to be replaced, and how well the ground takes an anchor. Re-tensioning slack straps on an otherwise sound system is at the very bottom of that range and is included when we relevel the home.