Re: [PSUBS-MAILIST] Sub Obesity

The figure I was using to calculate the wieght was 12lbs per square ft. , that was suppose to be the high end of an average wieght figure form the ferro-cement boat book that I've been using. The sand that I used was reccommended by a concrete consultant as the best because of its hardness, it was blasted from granite. So I think the sand I used was quite a bit heavier than your run of the mill river sand. And I have heavy duty ribs every 18 inches on the inside of the structure along with a liberal amount of concrete in the area where the two halves meet. So I'm looking on the bright side of this, I'm simply going to add more volume ! , which I don't mind doing, I have played around with this "contingency" design anyway, the only reason was not going to do it was because of the extra cost. I figure I need an extra 50 cubic feet or so to cancel everything out. More room to move around in!

On Wed, Mar 9, 2011 at 12:32 AM, Marc de Piolenc <piolenc@archivale.com> wrote:

To what do you attribute the error?

Marc

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On 3/9/2011 12:03 PM, ojaivalleybeefarm @dslextreme.com wrote:

Hi All,
Remember when I said I calculated my ferro ballast
superstructure at around 4000 lbs (on land), well I was off by a factor
of 1.75, She wieghed in at around 7000 lbs. I wieghed the beast this
morning on the truck scale in the yard where I am. So I looks like I
may be adding another room on the back! At least I don't have to buy
any lead.
Brian

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