Selection of Installation Method

The Seakeeper 35 can be affixed to the hull structure using two methods 1) Bolt-In installation or 2) Bond-In (Saddle) installation. See figures below.

Option 1 would be applied when a metal structure or laminated metal plates are available for attachment. The foundation would fasten directly to hull structure or plates using isolation gaskets for metal to metal contact using 32 x M16-1.0 fasteners. Depending on the structure to which the Seakeeper is fastened, blind threaded holes or thru-bolting can be utilized.

Option 2 would be commonly used on a hull constructed of glass reinforced plastic (GRP) or fiberglass. For this option, four 16 in. (406 mm) long by 8 in. (203 mm) deep saddles are bonded to properly spaced and prepared structural members that are an integral part of the hull structure. Seakeeper recommends using a structural adhesive with a lap shear strength of 2000 psi (13.8 MPa) or greater such as Plexus MA590. Careful consideration should be exercised by the installer while selecting the appropriate adhesive. Compatibility with the Seakeeper’s cast aluminum A356-T6 saddles, hull structure and pot life are three important factors to consider. Proper surface preparation in accordance with adhesive manufacturer’s recommendations prior
to installation is required.