View Full Version : Coach House Sides

07-19-2003, 09:39 PM

I'm going through the process of having a wooden boat built at the moment. I'm wondering whether to glue up the coach house sides out of smaller width stock or to make them out of 1 plank. The house is 500mm (20 inches) high at its aft end and at least 32mm thick (1 3/8 inches).

I'm concerned about cupping or cracking if we use a single plank either side. I'm also concerned that when glued up the sides will show glue lines (light timber and I'm a resorcinol addict).

Remembering that Australia is a hot dry summer place, I'd appreciate ideas here.



Lucky Luke
07-19-2003, 11:45 PM
500 high and 32 thk...! Very pretty when it is a single board of a nice teak (impossible to get nowadays) or mahogany, but will crack even with the best timber...unless:
1/ (most S&S designs have this): drill (not easy) through this high cabin side and insert S.S. rods (about 1' spacing, depending on portholes positionning), best with rivet like head one end, and threaded the other end (lower end)
2/ other solution: go for a top quality plywood, and thick veneer easch side. You will need a heated press to do that correctely with resorcinol glue: epoxy easier.

Some pics of actual construction or of plans would help telling more, if needed.

07-20-2003, 05:34 AM
Thats a pretty thick cabin side 32 mm ?
You sure it's not a thinner board plus frame work totals 32 mm?
Any work above water line should be as light as possible with structural integrity and stresses in mind of course.
If 32 mm is required then why not two layers of 12 mm ply with a 7 mm veneer of prefered timber on the outside for visual appeal?
All laminated and sealed with epoxy of course!

07-20-2003, 07:13 AM
Now you guys, this is a wooden boat - so no plywood.

It's 32mm of solid wood - it may be 2 x 16mm boards. The real question is should we have 2, 3 or 4 boards vertically?

Pic of the keel attached


Mike file:///Macintosh%20HD/Desktop%20Folder/110-1042_IMG.JPG

07-20-2003, 07:19 AM
Forgot to say, we have copper bolts running vertically through the coach house sides.

Attached also is a pic of the jig for the stem lamination (resorcinol of course) smile.gif


Wild Dingo
07-20-2003, 09:36 AM
picx not showing here mate! :(

Good to see another Aussie good on yer son!... and welcome :cool:

So now what is the boat?... all information pertaining to your build and the design in question are eagerly anticipated :cool:

Lucky Luke
07-21-2003, 12:55 PM
...copper rivets (bolts???) running vertically through the coach roof sides...?
You've answered to your question mate. That should do fine. It's similar to the S.S rods I suggested. Go ahead!

[ 07-21-2003, 01:56 PM: Message edited by: Lucky Luke ]

07-22-2003, 07:40 PM
What is this boat??? We want pix!

07-22-2003, 10:18 PM
I would strip plank it with tongue and groove and epoxy...use mahogany or similar if you desire a bright finish...kauri or similar if you want paint...it will be stronger, more dimensionally stable, better availability of wood etc

07-22-2003, 10:32 PM
My recently departed boat Fiona II (sob sob) had cabin sides of 1-3/8" honduras mahogany, through bolted to the carlins. One piece each side - no scarfs! Lovely long pieces of wood.

You know that wood, once it swells and crushes the fibres (because the bolts are holding it to the original dimensions) and after its shrunk back, if it swells again won't return to the original dimension without cracking (Wood Tech 101). However, that being said, FII, despite moving from the (v. wet) Pacific Northwest to Southern California, never showed ANY cracks in those beautiful cabin sides.

I's say go for it. It looks beautiful, saves you piles of work, and every time you look at it that one fair plank will fill your heart with pride.

After all, we have wooden boats because they look beautiful.

07-23-2003, 07:00 PM
Ok for all of you curious people, this boat is a Lyle Hess 32 being planked in Celery Top Pine over swamp gum steam bent frames. Deck is solid teak 50mm x 38mm, coach house sides are CTP also as is transom. Backbone timbers are Tasmanian Blue Gum except for the stem which is CTP laminated with resorcinol in a very large jig with a temperature control tent over it. She is being built to commercial survey.

We are at the moulds and ribbands stage at the moment. Photos when I work out how to do that...help!

07-31-2003, 12:12 AM
OK you wanted photos, here's my second attempt at photos:


The boat is at the framing stage, so steam bending is going on right now.



Jeff Robinson
07-31-2003, 02:55 AM
We are getting enough people, and absolutely definitely certainly enough BOAT here to make some elbow bending in Melbourne worthwhile. Any takers?


07-31-2003, 06:33 PM
Hi Jeff,

that seems like a fine idea. Any other takers?


[ 07-31-2003, 07:34 PM: Message edited by: Melbourne ]

08-02-2003, 05:32 AM

08-04-2003, 06:01 PM
Hi David,

tell me how you did that :rolleyes: