The first boat My dad bought was a TerraMarine. It was a 30 foot
flat-bottom houseboat that could convert to a trailer. It consisted of a
steel barge with an aluminum house. It drew about 6 inches. I would be
guessing at the thickness of the plate, but I do know a corrosion allowance
The previous owner left it tied to a dock and used it for a guest house.
Unfortunately, he left the shoreside power hooked up with the wrong polarity
for several years and electrolytically corroded the hull. Dad had to glass
it inside and out to stop the leaks
Another point of reference is Huckleberry Finn, a 50 foot Atkins houseboat
done for Motorboating sometime before 1953. This boat has 11/64 bottom
plate and 9/64 topside plate on 2x2x1/8 angle framing at 15 inch intervals
with 3 longitudinal 4x7.55 I stringers, 1/4x12 keel plates on top and bottom
of the framing, 3/16 bow and stern and 4 watertight bulkheads of 1/8 plate
with 1.25x1.25x1/8 angle stiffeners on about 18 inch spacing.
Unfortunately, displacement is not given. Gross dimensions are 50' LOA, 44'
LWL, 18' B, 1'-4" D.
The point is that, with competent design, a boat can be built of steel in
any size. Since framing and stiffeners are easy to attach, weight is not as
difficult a problem as one might think. Cost may be a different problem.
]On Behalf Of
Sent: Friday, February 02, 2007 3:15 AM
Subject: [bolger] Re: Steel ASharpie: speculation on plate thicknesses?
--- In email@example.com, "goadarama" <goadarama@...> wrote:
> So I take it the sharpie must be larger than a AS29 to really be
> practical in steel. Not necessarily AS39 big but maybe a AS34 or so.
I wouldn't assume that it is only for bigger boats. PCB did that
single hand world cruiser, Colonel something that is steel. Not much
bigger than a Micro.