Guide To Seawalls


BEAM & ANCHOR SYSTEM

DESCRIPTION:
The beam and anchor system consist of a poured in place reinforced concrete beam. The new beam is to be installed along the water side of the seawall, normally at mid point between the top and bottom of the existing seawall. The beam is attached to the seawall by a system of new anchors spaced 8 foot on center along the seawall.

PROS:
Structurally supports a larger portion of the seawall than just secondary anchors.

Requires no maintenance.

When a beam and anchor system is installed properly on a seawall that is in fair condition, and still has adequate penetration into the ground, the beam and anchor system can prevent a wall failure for 20 years or more.

CONS:
During the period the beam and anchor system is in service, it is to be expected that the existing seawall cap may need replacing.

NOTE: With a properly installed beam and anchor system in place, the cap is not relied upon as much for structural support, and can be replaced at the owners convenience.

GUIDELINES:
Before choosing a beam and anchor system, the seawall should have adequate penetration, and be in fair condition.

Severe horizontal cracks, or movement of the seawall may indicate that the seawall needs more structural support than the beam and anchor system.

New anchor systems should follow the same guidelines as secondaries, but be spaced 8 foot on center.

A full 45 degree angle should be installed at the bottom of the new beam.  This 45 degree angle is important as it deflects wave action and acts as noise abatement.

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