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Photo Essay How to Build an Alaskan - spirainternational.com

Plans for this boat may be found at: EssayHow to Build anAlaskanGrand Banks DoryHow to Build anAlaskan Grand Banks DoryThe Alaskan is an easy to Build Spira International framed boat. It is an 19 Grand Banks style dorysuitable for many lake, river and coastal ocean conditions. It is typical of the Spira Internationalframed hull boats. Construction grade lumber is all that is required to complete this rugged, hand-some all SpiraInternationalframed hulls, youbegin by buildingthe frames. Theseare constructed ofcommercial grade2x4s using asimple lap jointbonded usingepoxy glue. Theyare screwed to-gether to ensurethe epoxy is heldin close contactwith the parts untilthe adhesive how the framesare notched in thecenter for the keel-son to be installed ata later time. A holeis drilled in thecorner then thematerial cut outusing a jigsaw orbandsaw.

the chine log and sheer clamp that bend around the frames. A short piece of the material for these longitudinals is used to mark and hanad cut the notches, so they are teh correct shape and angle to accept the actual pieces. Simple scarf joints are used to make the sheer clamp and chine log lumber long enough to strretch the full length of the ...

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Transcription of Photo Essay How to Build an Alaskan - spirainternational.com

1 Plans for this boat may be found at: EssayHow to Build anAlaskanGrand Banks DoryHow to Build anAlaskan Grand Banks DoryThe Alaskan is an easy to Build Spira International framed boat. It is an 19 Grand Banks style dorysuitable for many lake, river and coastal ocean conditions. It is typical of the Spira Internationalframed hull boats. Construction grade lumber is all that is required to complete this rugged, hand-some all SpiraInternationalframed hulls, youbegin by buildingthe frames. Theseare constructed ofcommercial grade2x4s using asimple lap jointbonded usingepoxy glue. Theyare screwed to-gether to ensurethe epoxy is heldin close contactwith the parts untilthe adhesive how the framesare notched in thecenter for the keel-son to be installed ata later time. A holeis drilled in thecorner then thematerial cut outusing a jigsaw orbandsaw.

2 Note alsothat all frames arestraight. There is noneed for curves indory style hullframes, makingthem very simple could also use one of the new polyurethane adhesives, or any good waterproof constructionadhesive such as Liquid , a strongback jigis constructed. This isa sturdy beam onwhich your boat willbe constructed upsidedown. Some builderselect to put this onwheels so that theproject may moreeasily be rolled intoan dout of a storagearea to make it easierto work frames are then assembled to the strongback jig and temporarily attached this stage, everythingis squared up to getready to accept thelongitudinal you can see the slotfor the keelson, cutwider than the actuallumber that makes it leaves space oneither side called Lim-ber Holes to allowwater to travel betweenframes and not collect inone thekeelson isbeing fitted tothe frames.

3 Itis eitherscrewed orbolted to theframes as wellas glued usingeither epoxyor a high-strength, are cut into theframes to accept thelongitudinal elements,the chine log and sheerclamp that bend aroundthe frames. A shortpiece of the material forthese longitudinals isused to mark and hanadcut the notches, so theyare teh correct shapeand angle to accept theactual scarf joints are used tomake the sheer clamp andchine log lumber long enoughto strretch the full length ofthe boat. This joint is strongerthan the surrounding the chine log isfitted into the notches inthe frames. Once it isfitted in-place, it is gluedand screwed in positionto form a unitized struc-ture, much stronger thanold fashioned woodenboats only held togetherwith screws. In fact, inthese boats, you couldremove all of the fasten-ers and it would still bejust as hull is then faired.

4 This meanscutting the frameelements to the correctangle so that they meetthe plywood plankingflush. This is accom-plished with a differenttechniques on , it really starts looking like a boatThe plywood planking is temporarily clamped to the framing so that the frames can be used as apattern to trace outthe plywood shapes. This is a much more accurate way of cutting out the ply-wood than any pre-measuring designers insist that the plywood joints be scarf jointed together, bit this is a precise andcomplicated process. On Spira International boats, you need only join the plywood using a butt blockon the inside of the hull. This issimply a 6 wide block of thesame thickness as the plankingglued and screwed to the insideof the hull to form the the side planking has beencompleted and is groundsmooth to get ready to attachthe bottom planking.

5 All of theplywood planking is glued andscrewed the side plank-ing, the bottomplanking is cut outusing the boatframing as a is then glued andscrewed in-placeand butt blocksadded on the insideto reinforce fully planked hull is sanded smooth and the corners radiused to get ready to you fill the seams and screwholes so that theoutside of the hullis smooth and the surface preparedfor the fiberglass covering to beadded later. The epoxy resin rec-ommended for all Spira Interna-tional boats, has a strong adhesiveproperty on plywood, unlike theolder, less strong polyester is no need to staple down thefiberglass to the plywood whenusing epoxy, unlike the methodsused for polyester fiberglass tapeto cover the seamsensures a really robustconstruction. It s asimple step but resultsin a far sturdier boatNow the fiberglassing begins.

6 The trick is to only use enough resin to fully saturate the glass clothwithout building up excess layers. You can tell when there s enough resin because the opaque clothdisappears and turns transparent. It starts to look like a layer of comes theleast fun of all ofthe boat buildingprocess - sand-ing. Wear safetyglasses and facerespirator filtersto keep the dustout of your lungsand eyes, and getto work smooth-ing it as much asyou can. Thequality of thefinish dependson how well youdo this rub rails areadded next. Thesego on top of thefiberglass becausethey re there todeflect bumps andmay need to to flip over the hull and remove the strongback. After this, you just need to saturate the insidewith epoxy resin to seal it and Build out seats, center consoles, decking, sail rigging or whateverother accessories you wish.


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