INSTALLATION
MANUAL
Section 1: MECHANICAL INSTALLATION
1.3 Selection of Installation Method
The Seakeeper 9 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- DIRECT FASTENING OF SEAKEEPER FOUNDATION TO SHIPS STRUCTURE
Option 1 would be applied when a metal structure or laminated tapping plates are available for
attachment. The Seakeeper 9 frame would fasten directly to hull structure or plates using
isolation gaskets for metal-to-metal contacts and (16) M14X2.0 fasteners. Depending on the
structure to which the Seakeeper is fastened, blind threaded holes or thru-bolting can be
utilized.
OPTION 2- SADDLE INSTALLATION (4 PLACES)
Option 2 would most commonly be used on a FRP hull structure. For this option, four 11 inch
(280 mm) long by 4 inch (102 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. 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 very important. Recommended
adhesives can be found in Seakeeper Technical Bulletin 90382 – Structural Adhesive
Recommendations.
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