Re: Plywood scarfs
--- Inbolger@yahoogroups.com, "topsail" <topsail@s...> wrote:
very ends of the sheet........just kiddin' Topsail :-)
Obviously,with standard sized sheets and a 16' hull,the scarf joint
will appear pretty much smack in the middle of the boat.A well made
scarf joint in plywood will/should be as strong as the rest of the
panel and not need further reinforcement other then what will appear
naturally in the form of chine logs,shear clamps, seat risers or
other interior structures.One possiblity is to do the bottom panels
as follows; lay out one 4X8 panel in the middle "third" of the boat
and scarf on two 4X4 panels to either end to get 16' while simply
scarfing the topside panels end to end(scarf joint at half way point
along the hull sides)
As for the hull being "strong enough for offshore cruising", I'm
curious as to which design you have in mind. A reputable designer
should be able to vouch for his/her own designs limits and be best
able to inform you about the suitablilty of a particular design for
offshore work.
Peter Lenihan
> In a 16 foot hull built from 4x8 sheets of plywood I am wonderingabout
> the best placement of the scarf joints. I am not sure howundesirable it
> would be to have all the bottom and side joints to fall betweenthe same
> two frames amidships. Or is this an issue if ample butt blocks andample
> longitudinal stringers and chine logs are used. The hull should bestrong
> enough for offshore cruising.In a 16' hull,the best place for the scarf joints is right at the
very ends of the sheet........just kiddin' Topsail :-)
Obviously,with standard sized sheets and a 16' hull,the scarf joint
will appear pretty much smack in the middle of the boat.A well made
scarf joint in plywood will/should be as strong as the rest of the
panel and not need further reinforcement other then what will appear
naturally in the form of chine logs,shear clamps, seat risers or
other interior structures.One possiblity is to do the bottom panels
as follows; lay out one 4X8 panel in the middle "third" of the boat
and scarf on two 4X4 panels to either end to get 16' while simply
scarfing the topside panels end to end(scarf joint at half way point
along the hull sides)
As for the hull being "strong enough for offshore cruising", I'm
curious as to which design you have in mind. A reputable designer
should be able to vouch for his/her own designs limits and be best
able to inform you about the suitablilty of a particular design for
offshore work.
Peter Lenihan
In a 16 foot hull built from 4x8 sheets of plywood I am wondering about
the best placement of the scarf joints. I am not sure how undesirable it
would be to have all the bottom and side joints to fall between the same
two frames amidships. Or is this an issue if ample butt blocks and ample
longitudinal stringers and chine logs are used. The hull should be strong
enough for offshore cruising.
the best placement of the scarf joints. I am not sure how undesirable it
would be to have all the bottom and side joints to fall between the same
two frames amidships. Or is this an issue if ample butt blocks and ample
longitudinal stringers and chine logs are used. The hull should be strong
enough for offshore cruising.