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Re: Lashings, Rib and Deck-Beam Mortices
By:Brian Nystrom
Date: 4/15/2003, 12:34 pm

: Hi Brian

: Sorry, I missed this post earlier... and was cutting the ends of the Morris
: frame, 'lil boat #2, and just came back to it...

: On my lashings ( Starr frame #1 ), I drilled through the deck beams ( width )
: and then through the apummaqs on either side of the D-B. Then after about
: 4 winds on the lashing, I used a lashing across the beam to pull the two
: together. I believe Mark called them Frapping turns. ( fig. 2.26 - 2.28 on
: pages 38 and 39 of his book )

Ah, OK. I used the Morris/Petersen method where the beam is lashed on one side only.

: In those pictures he also shows his rib mortice right under the deck beam. I
: tried to avoid this, basically because these two little boats are using
: 2" apummaqs rather than 3 1/2" and I was afraid of getting it
: too weak in those areas. So, when I figured the distances for the beams in
: ralation to the ribs I came up with a couple that were pretty close. So, I
: ran the lashing beyond the rib mortice figuring that it would not weaken
: the area any more and also that the frapping would make it a tighter fit
: with the bigger angle.

: The lashing holes ended up being right at the same level as the bottom of the
: rib mortices. ( having angled them downward to aid in pulling the beams
: downward to strengthen the angled fit ) Does that make sense??

: Anyway, with the deck-beams 3/4" below the top edge of the apummaqs and
: the rib mortices comeing up around 3/4" into it, that was cutting it
: pretty close...

: Hope that explains it. ??

Yes, very clearly.

: Now, back to work on the Morris frame.. Will be making the rib-mortice jig
: tomorrow, but for tonight I'm trying to finish the shaping of the
: apummaqs.

Have fun!

Messages In This Thread

Skin-on-Frame: Deck Beam & Rib placement
Richard -- 4/11/2003, 1:23 pm
Re: Skin-on-Frame: Deck Beam & Rib placement
Rehd -- 4/11/2003, 9:10 pm
Re: Skin-on-Frame: Deck Beam & Rib placement
Brian Nystrom -- 4/14/2003, 1:36 pm
Re: Lashings, Rib and Deck-Beam Mortices
Rehd -- 4/15/2003, 3:36 am
Re: Lashings, Rib and Deck-Beam Mortices
Brian Nystrom -- 4/15/2003, 12:34 pm
Re: Lashings,......
Rehd -- 4/16/2003, 2:04 am
Re: Skin-on-Frame: Deck Beam & Rib placement
Brian Nystrom -- 4/11/2003, 3:23 pm
Re: Skin-on-Frame: Deck Beam & Rib placement
sing -- 4/11/2003, 2:24 pm