When installing earth anchor stakes for a uni-directional MAAS, what degree must be maintained?

When installing earth anchor stakes for a uni-directional MAAS, what degree must be maintained?

• A. 15 degrees
• B. 30 degrees
• C. 45 degrees
• D. 0 degrees

Answer: (A)

The main idea is how the pull from the uni-directional MAAS is transferred into the ground. An earth anchor stake holds best when it’s driven at a slight angle toward the expected direction of force. Maintaining a 15-degree tilt provides a good balance: most of the load is aligned with the stake itself (axial) while a small vertical component helps the stake bite into the soil, increasing resistance to being pulled out. If the stake is too flat against the ground, the horizontal pull can pry it out more easily. If it’s driven too steep, more of the load goes into bending or shear of the stake and its attachment, which can reduce holding power and complicate installation. So, keeping the stake at 15 degrees ensures reliable, directional loading for the uni-directional MAAS.

The main idea is how the pull from the uni-directional MAAS is transferred into the ground. An earth anchor stake holds best when it’s driven at a slight angle toward the expected direction of force. Maintaining a 15-degree tilt provides a good balance: most of the load is aligned with the stake itself (axial) while a small vertical component helps the stake bite into the soil, increasing resistance to being pulled out. If the stake is too flat against the ground, the horizontal pull can pry it out more easily. If it’s driven too steep, more of the load goes into bending or shear of the stake and its attachment, which can reduce holding power and complicate installation. So, keeping the stake at 15 degrees ensures reliable, directional loading for the uni-directional MAAS.