Question 1

Will frost heave move ground screws?

Accepted Answer

No — when sized correctly. Ground screws anchor below the active frost layer and resist the upward forces of heaving soil. The helical threads grip soil far more reliably than smooth concrete piers.

Question 2

Do they work in permafrost?

Accepted Answer

Yes. We spec specialty tips and lengths that reach below the active layer and bond into stable permafrost. This is one of the most common reasons builders switch from concrete in northern Alaska.

Question 3

What about bedrock?

Accepted Answer

We pre-drill and use a rock-anchor adapter that bonds the screw into the rock. The result is a permanent, fully-loadable footing without blasting or excavation.

Question 4

How much weight can one screw support?

Accepted Answer

Depends on the model and soil. Light deck screws handle around 3,500 lb. Cabin and dock screws run 7,000–14,000 lb. Heavy commercial screws exceed 20,000 lb of capacity.

Question 5

Do I need a permit?

Accepted Answer

It depends on your borough and structure. Many Alaska boroughs accept ground screws as engineered foundations — we provide stamped layouts and ICC documentation to support your permit application.

Question 6

How long does installation take?

Accepted Answer

Most residential foundations install in a single day — about 15 minutes per screw including layout. A typical deck or small cabin needs 12–22 screws.

Question 7

Can I install screws myself?

Accepted Answer

Yes. Our electric driver is designed for one-person operation. We provide a walkthrough video, torque guide, and phone support during your install.

Question 8

What soils don't work well?

Accepted Answer

Loose fill and uncompacted organics need longer screws and tighter spacing — sometimes a different foundation strategy. Send us your site info and we'll give you an honest answer.

Question 9

How does this compare to concrete cost?

Accepted Answer

For remote sites, ground screws are usually cheaper because you skip the concrete truck, excavation, and the time crew has to wait around. For close-to-road residential builds, costs are comparable but screws save days of schedule.

Question 10

Are the screws warrantied?

Accepted Answer

Yes. American Ground Screw products carry manufacturer warranties on structural performance and corrosion protection. We pass those through and back them with local support.

Question 11

How many ground screws will support my structure?

Accepted Answer

Typical estimates for wood-framed structures based on a 60 psf snow load range from 4 screws for a 6x6 (2,000 lbs load) to 30 screws for a 30x30 (45,000 lbs load). Typical beam spans range from 6 to 10 feet depending on size.

Question 12

Beam Span: How far apart can ground screws be spaced?

Accepted Answer

Under typical Alaska load guidelines (60 psf snow load), beam spans range from 6 feet to 10 feet. For light decks and boardwalks, 8 to 10-foot spans are common. For heavy cabins and lodges, we recommend keeping spans between 6 to 8 feet to distribute loads effectively.

Question 13

What is the difference between a ground screw and a helical pile?

Accepted Answer

Ground screws are typically fixed-length steel foundation systems designed for rapid, direct driving into stable ground layers (gravel, clay, permafrost). Helical piles/screw piles are often modular, extendable systems suited for deeper depths and heavier commercial-scale load requirements.

Common questions.
Straight Alaska answers.

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Common questions.Straight Alaska answers.