Holding the holding tank
 

I just discovered that the poly holding tank in our boat is secured
(or was until the screws pulled out) with galvanized steel strapping.
Gawd, the former owner loved the stuff, it's even holding up the
exhaust hose line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think
worked particularly well, I'd like to hear about it. I want to be
able to get the tank out easily and not risk abrading it if it shifts
around with the motion.

--

Roger Long

How about nylon webbing with rubber gasket material as chaffing and under
the tank to keep it from slipping?
"Roger Long" wrote in message
...
I just discovered that the poly holding tank in our boat is secured (or was
until the screws pulled out) with galvanized steel strapping. Gawd, the
former owner loved the stuff, it's even holding up the exhaust hose line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think worked
particularly well, I'd like to hear about it. I want to be able to get
the tank out easily and not risk abrading it if it shifts around with the
motion.

--

Roger Long

MMC wrote:
How about nylon webbing with rubber gasket material as chaffing and under
the tank to keep it from slipping?
"Roger Long" wrote in message
...

I just discovered that the poly holding tank in our boat is secured (or was
until the screws pulled out) with galvanized steel strapping. Gawd, the
former owner loved the stuff, it's even holding up the exhaust hose line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think worked
particularly well, I'd like to hear about it. I want to be able to get
the tank out easily and not risk abrading it if it shifts around with the
motion.

--

Roger Long

Actually I installed a poly water tank with galvanized
strapping. It wasn't ideal but didn't offend me too much.
Used neoprene padding under it at the corners.

Nylon webbing does sound good if you can come up with a good
tensioning device (multiple lashings through a sewn eye??)

Evan Gatehouse.

On Sat, 28 May 2005 16:52:45 -0700, Evan Gatehouse
wrote:

MMC wrote:
How about nylon webbing with rubber gasket material as chaffing and under
the tank to keep it from slipping?
"Roger Long" wrote in message
...

I just discovered that the poly holding tank in our boat is secured (or was
until the screws pulled out) with galvanized steel strapping. Gawd, the
former owner loved the stuff, it's even holding up the exhaust hose line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think worked
particularly well, I'd like to hear about it. I want to be able to get
the tank out easily and not risk abrading it if it shifts around with the
motion.

--

Roger Long

Actually I installed a poly water tank with galvanized
strapping. It wasn't ideal but didn't offend me too much.
Used neoprene padding under it at the corners.

Nylon webbing does sound good if you can come up with a good
tensioning device (multiple lashings through a sewn eye??)

Evan Gatehouse.

Further to Evan's note:
Steel or aluminum strap, with a moulded rubber underbelt is a standard
aviation fitting. At the terminal ends, the strap is often folded
back round a steel dowel and riveted. The dowel has a transverse screw
hole which is revealed by a slot pierced in the strap.
Another style of terminal is made in this way: threaded rod is welded
to a plate, which is in turn riveted to the strap, each end.

Nylon's strength is gained from its extended strain capability (it is
"stretchy") so that heaving loads can shift and rub on their mounts
if secured with nylon strap.
A polyester or terylene strap, such as you find on your seat belts is
stiffer.

You can see the terylene strap to metal stitching very clearly on seat
belts.
They are rated (if I recall) at 30g which is rather more than any boat
structure can handle, typically.

Brian Whatcott

How about the lever/latch used on a backpack or BC to hold a scuba tank in
place?

"Evan Gatehouse" wrote in message
...
MMC wrote:
How about nylon webbing with rubber gasket material as chaffing and under
the tank to keep it from slipping?
"Roger Long" wrote in message
...

I just discovered that the poly holding tank in our boat is secured (or
was until the screws pulled out) with galvanized steel strapping. Gawd,
the former owner loved the stuff, it's even holding up the exhaust hose
line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think
worked particularly well, I'd like to hear about it. I want to be able
to get the tank out easily and not risk abrading it if it shifts around
with the motion.

--

Roger Long

Actually I installed a poly water tank with galvanized strapping. It
wasn't ideal but didn't offend me too much. Used neoprene padding under it
at the corners.

Nylon webbing does sound good if you can come up with a good tensioning
device (multiple lashings through a sewn eye??)

Evan Gatehouse.

Good point Brian. Aren't scuba tank straps made of the same material as seat
belts?
"Brian Whatcott" wrote in message
...
On Sat, 28 May 2005 16:52:45 -0700, Evan Gatehouse
wrote:

MMC wrote:
How about nylon webbing with rubber gasket material as chaffing and
under
the tank to keep it from slipping?
"Roger Long" wrote in message
...

I just discovered that the poly holding tank in our boat is secured (or
was
until the screws pulled out) with galvanized steel strapping. Gawd, the
former owner loved the stuff, it's even holding up the exhaust hose
line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think
worked
particularly well, I'd like to hear about it. I want to be able to get
the tank out easily and not risk abrading it if it shifts around with
the
motion.

--

Roger Long

Actually I installed a poly water tank with galvanized
strapping. It wasn't ideal but didn't offend me too much.
Used neoprene padding under it at the corners.

Nylon webbing does sound good if you can come up with a good
tensioning device (multiple lashings through a sewn eye??)

Evan Gatehouse.

Further to Evan's note:
Steel or aluminum strap, with a moulded rubber underbelt is a standard
aviation fitting. At the terminal ends, the strap is often folded
back round a steel dowel and riveted. The dowel has a transverse screw
hole which is revealed by a slot pierced in the strap.
Another style of terminal is made in this way: threaded rod is welded
to a plate, which is in turn riveted to the strap, each end.

Nylon's strength is gained from its extended strain capability (it is
"stretchy") so that heaving loads can shift and rub on their mounts
if secured with nylon strap.
A polyester or terylene strap, such as you find on your seat belts is
stiffer.

You can see the terylene strap to metal stitching very clearly on seat
belts.
They are rated (if I recall) at 30g which is rather more than any boat
structure can handle, typically.

Brian Whatcott

I just had a plumber in who was using a plastic version of the time
honored galvanized strapping. I use the word plastic genericly in this
case, I am not sure exactly what family of materials it belongs in, but
it does meet the plumbing code, and he used the stuff in locations that
were not going to be accessible after sheetrocking.

Jonathan

Roger Long wrote:

I just discovered that the poly holding tank in our boat is secured
(or was until the screws pulled out) with galvanized steel strapping.
Gawd, the former owner loved the stuff, it's even holding up the
exhaust hose line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think
worked particularly well, I'd like to hear about it. I want to be
able to get the tank out easily and not risk abrading it if it shifts
around with the motion.

On Sun, 29 May 2005 14:54:04 GMT, "MMC" wrote:

Good point Brian. Aren't scuba tank straps made of the same material as seat
belts?

The ones I have seen have terylene straps, yes

Brian W
///
Nylon's strength is gained from its extended strain capability (it is
"stretchy") so that heaving loads can shift and rub on their mounts
if secured with nylon strap.
A polyester or terylene strap, such as you find on your seat belts is
stiffer.

You can see the terylene strap to metal stitching very clearly on seat
belts.
They are rated (if I recall) at 30g which is rather more than any boat
structure can handle, typically.

Brian Whatcott

Well, even though the boat was in fresh water, the stainless screws in
the galvanized strap had made a rusty mess. The corrosion by products
also seem to have effected the plywood under the glass so the screws
pulled out easily. As soon as you cut this stuff, the zinc protection
is broken. Normally, galvanizing self heals to some extent but the
presence of the stainless may interfere with this process.

--

Roger Long



"5200" wrote in message
...
On Fri, 27 May 2005 22:08:57 GMT, "Roger Long"
wrote:

I just discovered that the poly holding tank in our boat is secured
(or was until the screws pulled out) with galvanized steel
strapping.
Gawd, the former owner loved the stuff, it's even holding up the
exhaust hose line.

Obviously, I've got to come up with something else. I can think of a
number of alternatives but, if anyone has done something they think
worked particularly well, I'd like to hear about it. I want to be
able to get the tank out easily and not risk abrading it if it
shifts
around with the motion.

I bought a homemade boat which features the original galvanized
steel
strapping from 25 years ago throughout. Guess the guy was a plumber.
It's holding fine. I splurged on some stainless screws when I moved
something. Felt like a king. I also cut up sheets of that cheap shop
floor matt material for dampening and scuff resistance as needed. I
built a 2" high frame to keep the holding tank from moving around
and
wedged some matt shims in.
smooth sailing or motoring or paddling or drifting or whatever.

If you feel the method was sound but the material wasn't, use copper
strapping of the same sort.

It's what I'll hold my very large pressure accumulator to the deck and hull
in the engine room, and what's left over, I'll use for ground straps,
increasing the (flat) surface area greatly beyond the wire cable previously
used between my tuner and arch, and bridging the gates on the sides so my
arch, rails and gates will all be connected...

Not very much more for 10' of it in the plumbing aisle than for
galvanized...

L8R

Skip, refitting as fast as I can

--
Morgan 461 #2
SV Flying Pig
http://tinyurl.com/384p2

"Twenty years from now you will be more disappointed by the things you
didn't do than by the ones you did do. So throw off the bowlines. Sail
away from the safe harbor. Catch the trade winds in your sails. Explore.
Dream. Discover." - Mark Twain