Guide To Seawalls

SECONDARY ANCHOR

DESCRIPTION:
Secondary anchors were designed as a supplement to the existing anchors. They consist of a 1 inch diameter coal tar epoxy coated steel rods, 12' long, but preferably 16' (where possible), encased in PVC and anchored with a reinforced concrete deadman. (Approx. 48" wide x 18" high x 12" thick).

PROS:
Structurally head1 the portion of the seawall that is anchored.

CONS:
Supports only that portion of the wall anchored leaving the seawall prone to failure in other areas.

Should be used primarily when a seawall only needs upper support.

If not re-coated periodically  (which is seldom done) has life span of approximately 10 years.

GUIDELINES:
Should be only installed when only upper support is required. Anchors do little to stop a mid point or mud line failure.

Anchor blocks should be installed as deep as possible. (In most cases 3'-6" to 4'-6" to the bottom of the block is a good rule of thumb.)

Anchor blocks should be installed landward of the seawall as far back as possible preferably 16' and if necessary cutting a pool deck to achieve this distance is not out of the question.

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