Need some help stabilizing a bimini top
 

On Aug 13, 11:06 pm, "Midlant" wrote:
JR, since you built your own bimini frame, how did you get the width
correct when bending the tubing?
If I had a length of tubing and needed two bends, such as a bimini
frame, and I need a height of 49" and width of 88" and the tubing was of
appropriate length, where would I start the 90d bends?

John

John-

Any chance you can start a separate thread so I can continue to
receive responses under the original title?

Thanks!

JR, my boat doesn't have as many attach point options as your boat.
if there was a nearby fixture or railing for an easy brace point, I'd
use it. I'm going to have to add something.

Jim, when deployed (with further bracing action from the forward
straps) the oscillating is cut down somewhat, but it is still pretty
hard on the windshield.

Wayne, the dealer's service department is proving to be fairly
marginal. They had a lot of trouble getting the 20 hour service and a
very simple warranty punch list right. I don't know that I'd trust
them with this issue, either as advisors or as implementers.

Measuiriing stretch from bending tubing was Need some helpstabilizing a bimini top
 

Go back to the link, and start at the beginning of the series. All your
Q's answered.
JR

Midlant wrote:
JR, since you built your own bimini frame, how did you get the width
correct when bending the tubing?
If I had a length of tubing and needed two bends, such as a bimini
frame, and I need a height of 49" and width of 88" and the tubing was of
appropriate length, where would I start the 90d bends?

John




--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

Need some help stabilizing a bimini top
 

Thank you, I will. Content and secure in the knowledge that the Lateral
Brace is the ONLY (read O-N-L-Y) thing stabilizing the frame laterally.
"It serves to prevent the Bimini Frame from occillating side to side,
and banging against the Arch."
JR
here's hoping your boy is on top of everything.


JimH wrote:

"JR North" wrote in message
...

The Arch does nothing to prevent sway, except get in the way. The
attachments of the frame to the Arch do not affect it's stability, pro or
con. Vic is right.
JR


Your frame is inside the confines of your radar arch. It certainly does
add to the stability of the frame and prevents radical sway.

Enjoy the evening JR. I am waiting for a phone call from my son on Parris
Island.




--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

Need some help stabilizing a bimini top
 

There's nothing that says it will be easy. Get creative and add a hard
point that will work for mounting a brace. West Marine catalog-bimini
and railing fittings. I'm SURE there is something there that will work.
Before I built my new frame, I used to stabilize the lateral sway of the
old frame with a simple tie-off of line from one corner of the frame to
a low point. Worked well.
JR

wrote:



JR, my boat doesn't have as many attach point options as your boat.
if there was a nearby fixture or railing for an easy brace point, I'd
use it. I'm going to have to add something.


--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

Need some help stabilizing a bimini top
 

Move your attachment points to the boat and off the windshield. You may
have enough height with you currrent frame to do that. Keep in mind that
you don't need it to be much taller than 6'6" from the boat floor inside.
The longer the frame the more it will sway.

"rbstern" wrote in message
ups.com...
Hello rec.boaters. Hope all is well and everyone is having a good
season.

Bought a Larson 22' bowrider earlier this year and had a very
enjoyable summer of cruising and water sports with family and
friends. Couple of small warranty issues, but overall she proved to
be solid and I am pleased with the boat.

However, there is one thing about the boat that is driving me nuts.
The bimini top: How it is attached to the boat, how much it flexes the
windshield at the attach points, and how much noise it makes because
of the flexing.

During any kind of chop, the bimini oscillates port and starboard, and
causes the windshield sides to flex very noticably. It's flexing
enough that I am concerned about gelcoat damage at the windshield/hull
attach points.

The bimini is a typical stainless tube structure. The base fixtures
are well attached to the gunnel (aft) and windshield frame (forward).

Here's a stock photo, and I've added a crude wireframe diagram to show
where the bimini attaches:

http://www.zjstech.net/larson/larsonbim1.gif

When deployed, two straps attach to anchor points at the corners of
the windshield.

Here's another stock photo showing the detail just inside the
windshield. The gunnel is several inches wide. The green lines
represent what I think is a logical place to put some type of support
post. I think it would look bad, breaking up the clean lines of the
gunnel, but I am at a loss for what else to do.

http://www.zjstech.net/larson/larsonbim2.gif

Getting rid of the bimini is not an option. Too much 12 o'clock sun
here in the south.

Suggestions appreciated.

Need some help stabilizing a bimini top
 

On Mon, 13 Aug 2007 21:00:46 -0700, wrote:

Wayne, the dealer's service department is proving to be fairly
marginal. They had a lot of trouble getting the 20 hour service and a
very simple warranty punch list right. I don't know that I'd trust
them with this issue, either as advisors or as implementers.

As long as you are prepared to pay for it yourself, I'd just find a
good boat canvas shop then and let them take care of it. They'll know
how to fix it but it may be a do over.

Need some help stabilizing a bimini top
 

Wayne.B wrote:
On Mon, 13 Aug 2007 21:00:46 -0700, wrote:

Wayne, the dealer's service department is proving to be fairly
marginal. They had a lot of trouble getting the 20 hour service and a
very simple warranty punch list right. I don't know that I'd trust
them with this issue, either as advisors or as implementers.

As long as you are prepared to pay for it yourself, I'd just find a
good boat canvas shop then and let them take care of it. They'll know
how to fix it but it may be a do over.


This sort of bimini doesn't wobble because it is properly supported.

http://tinyurl.com/3bqs5d

Need some help stabilizing a bimini top
 

HK wrote:
Wayne.B wrote:
On Mon, 13 Aug 2007 21:00:46 -0700, wrote:

Wayne, the dealer's service department is proving to be fairly
marginal. They had a lot of trouble getting the 20 hour service and a
very simple warranty punch list right. I don't know that I'd trust
them with this issue, either as advisors or as implementers.

As long as you are prepared to pay for it yourself, I'd just find a
good boat canvas shop then and let them take care of it. They'll know
how to fix it but it may be a do over.


This sort of bimini doesn't wobble because it is properly supported.

http://tinyurl.com/3bqs5d

Sure it doesn't wobble. It never sees the water. It also looks like it
wasn't constructed very well or it's not installed correctly.

Need some help stabilizing a bimini top
 

On Aug 14, 2:42 pm, HK wrote:
Wayne.B wrote:
On Mon, 13 Aug 2007 21:00:46 -0700, wrote:

Wayne, the dealer's service department is proving to be fairly
marginal. They had a lot of trouble getting the 20 hour service and a
very simple warranty punch list right. I don't know that I'd trust
them with this issue, either as advisors or as implementers.

As long as you are prepared to pay for it yourself, I'd just find a
good boat canvas shop then and let them take care of it. They'll know
how to fix it but it may be a do over.

This sort of bimini doesn't wobble because it is properly supported.

http://tinyurl.com/3bqs5d

The bimini in the picture (your boat?) is not designed to be stowed in
an upright position. So instead of two hard attach points on each
side, there is only the center point, with the tension provided by
four adjustable straps, probably counteracting the lateral forces.

When I put a lot of pressure on the front straps (bimini deployed), it
does cut down on the oscillating quite a bit. Not entirely to my
satisfaction, but much better than when the bimini is stowed. Another
two straps leading to the back would probably cut it further still,
but that's not a desirable solution. Too much docking, swimming and
water sports from that part of the boat to want another pair of
straps.

Need some help stabilizing a bimini top
 

On Aug 14, 8:09 am, "jamesgangnc" wrote:
Move your attachment points to the boat and off the windshield. You may
have enough height with you currrent frame to do that. Keep in mind that
you don't need it to be much taller than 6'6" from the boat floor inside.
The longer the frame the more it will sway.


Probably the best choice. Just need to do it neatly.