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Old 16-07-2019, 00:51   #1
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Security Bars / Polycarbonate

Has anyone fitted security bars / mesh / grilles to their Cat?

Thoughts on glued poly carbonate being equivalently strong against a rock / bar / machete?

Hatches?
Sliding door?

Thinking of ideas to "lock down" if you cannot scare intruders off the boat.
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Old 16-07-2019, 02:06   #2
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Re: Security Bars / Polycarbonate

Cats are especially hard to secure (vs a traditional monohull w limited ingress/egress points).

Given all the expanses of windows/sliding doors/hatches, you can go with a ploycarbonate (AKA Lexan), but they tend to go cloudy w UV exposure. There are some which have UV resistant coatings, but still eventually go cloudy. Last time I used such a prodcut was over a decade ago, it went cloudy in a few years. Maybe there are some better coatings now. If anyone knows of such, would love to hear about it.
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Old 16-07-2019, 02:10   #3
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Re: Security Bars / Polycarbonate

Or perhaps there is Acrylic that is strong enough
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Old 16-07-2019, 02:15   #4
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Re: Security Bars / Polycarbonate

Acrylics are more brittle, polycarbonates are much impact resistant.
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Old 16-07-2019, 03:42   #5
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Re: Security Bars / Polycarbonate

How about cutting polycarbonate with a cnc machine to look like chain link fence. "Sorta" Thicker links. Then attach with threaded studs and wing nuts. Easy to remove in an emergency but hard to get to from the out side. " You would have light weight security bars with minimal view and breeze restrictions"
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Old 16-07-2019, 05:08   #6
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Re: Security Bars / Polycarbonate

Polycarbonate rod could offer some interesting possiblities.

https://www.ebay.com/bhp/polycarbonate-rod
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Old 16-07-2019, 09:28   #7
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Re: Security Bars / Polycarbonate

Try to find GE LEXAN MARGARD IN 3/8" thick sheets.

I have been installing it in many sailing yachts for over 15 years.

None have discolored or even scratched.

The key is the Margard coating. it makes the Lexan slightly less flexible, but the improved UV protection make for a perfect marine product.

It is easily cut with any saw or router that has a speed control. One must go slow to keep the plastic from getting hot and melting...
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Old 16-07-2019, 09:32   #8
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Re: Security Bars / Polycarbonate

There you go ^^
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Old 17-07-2019, 14:14   #9
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Re: Security Bars / Polycarbonate

Quote:
Originally Posted by belizesailor View Post
Cats are especially hard to secure (vs a traditional monohull w limited ingress/egress points).

Given all the expanses of windows/sliding doors/hatches, you can go with a ploycarbonate (AKA Lexan), but they tend to go cloudy w UV exposure. There are some which have UV resistant coatings, but still eventually go cloudy. Last time I used such a prodcut was over a decade ago, it went cloudy in a few years. Maybe there are some better coatings now. If anyone knows of such, would love to hear about it.
I can attest to the impact strength of polycarbonates. Just for S&Gs I shot a 1/4 inch piece, unsupported with a 38spec.. It fractured the 2' X 2' panel but did not penetrate. It will scratch but does not check like plexiglass did, in days of yore. As an aside, it would make for excellent hatch boards being translucent
and about impenetrable.
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