On 4/7/21 4:14 AM, Richard Smith wrote:
Robert Nichols writes:

...........

[digression from OP's purpose]

On 4/6/21 12:08 PM, Clare Snyder wrote:
I do a lot of these calculations.
eg.
http://www.weldsmith.co.uk/tech/stru...lat_calcs.html


Rich Smith
Interesting liittle project - O like your reasoning and explanation -
particularly your "tap stick"
I've run into a lot of your "welders" who would make the thing so
heavy it could hardly support itself!!! (or they would fasten it to
the rig instead of the barge and it would be so heavy it would tip the
rig before it would bend - - -


Speaking of welders, how about making a truss? Those can be quite lightweight,
have a decorative design, and still be very rigid.

--
Bob Nichols AT comcast.net I am "RNichols42"

If the strength had been any less / if it hadn't felt right when
assembled, I'd have probably done that.
Form a "tent-shape" triangular truss part, rising diagonally from the
deck to the top of the first "stanchion" then sloping down diagonally
to about the middle of the deck?
Ultimately - the strength was enough, while the secondary steelwork
with the "clue-sticks" incorporated drew-out the safety margin
desired.

I was thinking more along the lines of a double rail, about 3 inches apart,
with diagonal members welded in. I made something like that out of square
tubing a while back, and it turned out about 10X stronger than it needed
to be.

--
Bob Nichols AT comcast.net I am "RNichols42"