{"id":21445,"date":"2026-06-15T16:02:24","date_gmt":"2026-06-15T16:02:24","guid":{"rendered":"https:\/\/manuals.seakeeper.com\/seakeeper\/seakeeper-4-4-5-installation-manual-90762-1-copy\/2-0-mechanical-installation\/2-3-bolt-in-installation\/2-3-1-preparation-of-boat-structure\/"},"modified":"2026-07-31T11:55:21","modified_gmt":"2026-07-31T11:55:21","slug":"2-3-1-preparation-of-boat-structure","status":"publish","type":"page","link":"https:\/\/manuals.seakeeper.com\/seakeeper\/seakeeper-5-installation-manual\/2-0-mechanical-installation\/2-3-bolt-in-installation\/2-3-1-preparation-of-boat-structure\/","title":{"rendered":"2.3.1 Preparation of Boat Structure"},"content":{"rendered":"\n

The Seakeeper<\/span> Drawing No. 90736, Seakeeper<\/span> 4.5\/5 Generic Installation Guide shows various structural arrangements to support the installation of the Seakeeper<\/span> 5. The Generic Installation Guide offers above and below deck installation arrangements with fiber reinforced plastic (FRP) and aluminum structures, which should provide solutions for most vessels. The Seakeeper<\/span> 5 is affixed to the hull structure via eight bolts in the Seakeeper<\/span> frame. Depending on the structure to which the Seakeeper<\/span> is fastened, blind threaded holes or through-bolting can be utilized.<\/p>\n\n\n\n

Refer to Seakeeper<\/span> Drawing No. 90736<\/strong>, Seakeeper<\/span> 4, 4.5, & 5 Bolt in Installation Guide. Important dimensional and load information is given in this drawing that will impact the design details of the structure that will receive the Seakeeper<\/span>. It is assumed that a proper structural analysis has been performed for the hull structure to which the Seakeeper<\/span> will be fastened to ensure proper strength margins for the loads the Seakeeper<\/span> will create during operation.<\/p>\n\n\n\n

The hull structure supporting the Seakeeper<\/span> should be installed so the Seakeeper<\/span> is parallel to the waterline in the transverse direction and within 2 degrees longitudinally.<\/p>\n\n\n\n

In addition, the four areas on top of the structure on which the Seakeeper<\/span> frame and isolation gaskets will rest, need to be co-planar within .06 in. (1.5 mm) to minimize potential distortion of the Seakeeper<\/span> support frame when installed. The isolation gaskets are only used when the Seakeeper<\/span> is mounted to a dissimilar metal structure.<\/strong><\/p>\n\n\n\n

Seakeeper<\/span> offers an optional installation template kit, P\/N 90819<\/strong>, which contains four plates that mimic the mating surfaces of the four feet located on the Seakeeper<\/span>\u2019s foundation. These plates have eight holes located at the same centers as the mounting holes on the Seakeeper<\/span>. The fixture locates the hole patterns at the proper spacing both in the forward-aft direction and the port-starboard direction. Once assembled, the fixture can be used to check clearances and alignment of the hull structure.<\/p>\n\n\n\n

Note: Do NOT use the installation fixture to establish the Seakeeper<\/span> envelope dimensions. Refer to Drawing No. 90726 \u2013 Seakeeper<\/span> 4, 4.5, & 5 Bolt-In Installation Details, for envelope dimensions. A 3-D model of the Seakeeper<\/span> is available on the Seakeeper<\/span> Dealer Access website (www.seakeeper.com<\/a>) to aid in designing the Seakeeper<\/span> foundation and the space around the Seakeeper<\/span>.<\/strong><\/p>\n\n\n\n

NOTE: MAKE SURE NO OBSTRUCTIONS FROM THE HULL STRUCTURE CAN BE SEEN WITHIN
THE INSIDE OF THE INSTALLATION TEMPLATE KIT. REFERENCE SEAKEEPER
DRAWING NO. 90726 \u2013 SEAKEEPER 4, 4.5, & 5 BOLT-IN INSTALLATION DETAILS<\/p>\n","protected":false},"excerpt":{"rendered":"

The Seakeeper Drawing No. 90736, Seakeeper 4.5\/5 Generic Installation Guide shows various structural arrangements to support the installation of the Seakeeper 5. The Generic Installation Guide offers above and below deck installation arrangements with fiber reinforced plastic (FRP) and aluminum structures, which should provide solutions for most vessels. The Seakeeper 5 is affixed to the […]<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":21443,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"manual":[375],"model":[],"document_type":[],"hidden":[],"class_list":["post-21445","page","type-page","status-publish","hentry","manual-seakeeper-5-installation-manual"],"acf":[],"_links":{"self":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21445","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/comments?post=21445"}],"version-history":[{"count":3,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21445\/revisions"}],"predecessor-version":[{"id":22064,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21445\/revisions\/22064"}],"up":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/21443"}],"wp:attachment":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/media?parent=21445"}],"wp:term":[{"taxonomy":"manual","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/manual?post=21445"},{"taxonomy":"model","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/model?post=21445"},{"taxonomy":"document_type","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/document_type?post=21445"},{"taxonomy":"hidden","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/hidden?post=21445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}