Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 09-10-2009, 10:39   #16
S&S
Registered User
 
S&S's Avatar

Join Date: Jul 2009
Boat: 48' 1963 S&S yawl
Posts: 851
Images: 6
Quote:
Originally Posted by GWB View Post
Is the autoglass thick enough?

Thanks
Depends on what kind of weather you're planning for. I'd say for general purposes it should be okay.
__________________

__________________
S&S is offline   Reply With Quote
Old 09-10-2009, 11:29   #17
GWB
Registered User

Join Date: Sep 2008
Location: Brookings, Oregon
Boat: Westsail 32
Posts: 296
Images: 1
Quote:
Originally Posted by S&S View Post
Depends on what kind of weather you're planning for. I'd say for general purposes it should be okay.
Well - I was thinking if a big boarding wave smashed against the portlight, I wouldnt want it to break! You know the saying "plan for the worst and hope for the best"
Anyone know what thickness the ABI glass is from the factory?
__________________

__________________
GWB is offline   Reply With Quote
Old 09-10-2009, 12:01   #18
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,580
Images: 240
Quote:
Originally Posted by S&S View Post
... windshields are not tempered, and the side windows are tempered, not laminated...
Thanks, I stand corrected.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 09-10-2009, 12:17   #19
Registered User
 
fishwife's Avatar

Join Date: Aug 2009
Location: South coast of England, moving around a bit.
Boat: Long range motor cruiser
Posts: 750
Did anyone mention deadlights? Whatever you go for, do the deadlight thing. When water is pouring through that broken light, you will bless a deadlight. Don't ask how I know. Well, go on then, but get the drinks in first won't you, and will ya kindly swing the lantern as ye pass

Paige
__________________
fishwife is offline   Reply With Quote
Old 09-10-2009, 12:38   #20
S&S
Registered User
 
S&S's Avatar

Join Date: Jul 2009
Boat: 48' 1963 S&S yawl
Posts: 851
Images: 6
Quote:
Originally Posted by GWB View Post
Well - I was thinking if a big boarding wave smashed against the portlight, I wouldnt want it to break! You know the saying "plan for the worst and hope for the best"
Anyone know what thickness the ABI glass is from the factory?
Probably not thick enough. Go with the windshield glass and make some plywood storm shutters. I don't think the stock ABI frames will fit thick glass. Ours were made so we got to spec the glass thickness.

Usually production ports just have 1/8" (or less) plate glass (worst of both worlds)
__________________
S&S is offline   Reply With Quote
Old 09-10-2009, 13:11   #21
Registered User
 
Kefaa's Avatar

Join Date: Sep 2008
Location: Eastern PA
Boat: Island Packet 31 (35'), Black Squirrel
Posts: 239
What about hatches?

A question for those of you who have done it. I have cracked glass (see attached) and a couple of the ports are showing crazing. Is it ports only or is it sufficient for 14+" hatches?

What if someone stepped on it? Does it become like a car window, 1000 harmless pieces, but still 1000 pieces. (I have been told I cannot jump on the windshield to test this. )

To go astray for a moment, they put a vent through the plexi, I am guessing it was easier than the hull (or less nerve racking). Have them cut the same for the auto glass?
Attached Thumbnails
Click image for larger version

Name:	crackedPort.jpg
Views:	125
Size:	372.6 KB
ID:	10395  
__________________

Kefaa is offline   Reply With Quote
Old 09-10-2009, 13:46   #22
S&S
Registered User
 
S&S's Avatar

Join Date: Jul 2009
Boat: 48' 1963 S&S yawl
Posts: 851
Images: 6
With that kind of crack it's acrylic. I wouldn't advise glass for large ports.
__________________
S&S is offline   Reply With Quote
Old 09-10-2009, 14:22   #23
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,115
Recently sold my glass and aluminum company.

Glass, in this sort of application, could consist of any combination of 3 types:

a. Float, or plate glass = strength factor 1
b. Heat strengthened = """"""""""""""""""""" 2.5
c. Tempered = """""""""""""""""""" 4

The interlayer PVB (polyvinyl butyral) is usually .030, .060, or .090 thou.
In large laminated lites it is common to use any 2 types so as to gain different shatter characteristics, thereby creating different separation possibilities from the PVB. This is the thought behind "hurricane- resistant" assemblies, or "large-missile-impacted", LMI in building construction.

When cutting holes in glass, the accepted practice is the distance to the nearest edge should not normally be less than the diameter of the hole.

One should always determine what type of glass is being supplied to you.
__________________
Blue Stocking is offline   Reply With Quote
Old 09-10-2009, 15:20   #24
Registered User
 
Fishman_Tx's Avatar

Join Date: Apr 2009
Location: Beeville, Tx.
Boat: 1969 Morgan 40 Cruising Ketch "Lady Catherine II", 1973 Bristol 34 - "Our Baby"(RIP), Catalina 22
Posts: 876
Images: 12
Blue Stocking:
Would it then be desirable to put tempered and laminated in together? Tempered out?
__________________
Fish
"Behind every great man there is a woman, rolling her eyes."
But not for long! Now she's gone!
and peace and tranquility reign forever!
1969 Morgan 40 Cruising Ketch
Fishman_Tx is offline   Reply With Quote
Old 09-10-2009, 16:03   #25
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
- - In an environment with frequent waves and rain and lots of UV, trying to put two pieces flat against each other will probably result in sea water or other water ending up between the layers. Not a good situation.
- - My ABI round ports are 5/16" in thick. But thickness would depend upon the orientation of the portlight to the boarding waves. Perpendicular would require stronger equating to thicker glass than oblique where glancing blows are less stressful.
- - for the "triangular long thin rectangular prism port lights I would believe you would have to get replacements from the manufacturer as normal glass shop do not carry triangular prism glass.
- - My Chevy van back home has laminated glass on both windshield and side windows.
- - That hatch has "glass" in it? I didn't think that was allowable under ABYC. Lexan is normally used it is stronger than plexiglass and will flex and recover better when stepped on. Lexan will craze, spider pattern surface and yellow faster than plexiglass but is used where there is a possibility of somebody standing on it. Any holes cut in glass or plastic severely degrades the "strength" in that unless absolutely perfectly edged, the hole will allow minute cracks to grow when under stress loading. I prefer to mount ventilators through the cabin top rather than through hatch glass/plastic.
__________________
osirissail is offline   Reply With Quote
Old 09-10-2009, 16:35   #26
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,115
Fishman Tx,

A true laminated assembly would be made up at the glass fabrication plant and shipped as a built unit, and would not be cheap. Usually in large units the outer lite is tempered, and the inner heat strengthened. A lot would depend on the size of the lite and the type of risk you intended to expose the boat to.

osirissail is correct in the first statement. I have to say I have always thought that the number of portlights with discoloration around the edges of the glass is way out of proportion to the number of failures we see in building construction, even in shore front installations, where it is standard requirement to give a ten year warranty against manufacturing defect. My 11yr old ABI ports are showing about a 50% failure thru discoloration.
__________________
Blue Stocking is offline   Reply With Quote
Old 09-10-2009, 16:47   #27
Registered User
 
Fishman_Tx's Avatar

Join Date: Apr 2009
Location: Beeville, Tx.
Boat: 1969 Morgan 40 Cruising Ketch "Lady Catherine II", 1973 Bristol 34 - "Our Baby"(RIP), Catalina 22
Posts: 876
Images: 12
That's what I thought. I guess the question now is to either replace the ports @ $189 ea (for the smaller 6 - 4x9) or reglass with plain auto safety glass or tempered. These are the original 1973 issue and are all badly crazed. The boat will coastal cruise initially then the Carib and G of M. No "crossings" in the near or far future for this boat.
__________________
Fish
"Behind every great man there is a woman, rolling her eyes."
But not for long! Now she's gone!
and peace and tranquility reign forever!
1969 Morgan 40 Cruising Ketch
Fishman_Tx is offline   Reply With Quote
Old 09-10-2009, 17:10   #28
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Our windows are tempered and laminated glass. About 15 y.o. lots of use abuse and going strong.

b.
__________________
barnakiel is offline   Reply With Quote
Old 28-10-2009, 09:33   #29
Sponsoring Vendor

Community Sponsor
Cruisers Forum Supporter

Join Date: Mar 2008
Location: Milton, Ontario
Boat: still dreaming...getting close...
Posts: 192
The advantages of using glass are somewhat in question around the shop here. First the cost of glass is much higher than even really good quality cast acrylic. The strength is obviously a big factor, but we make up for that by using thick cast acrylic (3/8" or 1/2") and that still comes in much less expensive than glass. Glass does not provide any better of a seal and the risk of shattering or cracking by being hit is higher than with cast acrylic. Also, tinting glass is very expensive and probably not even an option most of the time, whereas it is easy to find tinted cast acrylic.

With a good installation and by using the best cast acrylic, your ports won't need to be reglazed for at least 15 years which is at least very comparable with glass. So basically, we feel that the advantages of glass over cast acrylic are outweighed by the cost, the lack of tinting, the higher weight, and the risk of shattering.
__________________
Atkins & Hoyle Ltd. Over 40 years of Marine Innovation, Quality and Craftsmanship
Davits, Hatches, Ports, Hatch Repairs, Motor Lifts, Arches/Hardtops and Custom Designs www.AtkinsHoyle.com |atkinshoyle@dapa.com
Benjamaphone is offline   Reply With Quote
Old 28-10-2009, 15:27   #30
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Laminated glass is quite safe and is normally used in small sizes in areas of the boat where they are rarely subjected to impact damage. Glass will not surface craze as all plastics do. UV will start to craze plastic in a few short years in the strong Caribbean and Equatorial sunshine. Gas will not. Laminated glass is easy to access in most places with a extensive automobile glass shops. Plexiglass and Lexan are not cheap and the more exotic Acrylics are very expensive and difficult to find in small amounts.
__________________

__________________
osirissail is offline   Reply With Quote
Reply

Tags
portlights

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
CT34 - Portlight Seals RSMacG Construction, Maintenance & Refit 4 12-08-2011 20:05
Small Round Portlight? michaelmrc Construction, Maintenance & Refit 2 22-05-2009 20:20
Portlight Seals Martinini Construction, Maintenance & Refit 1 17-03-2009 02:35
portlight shades or blinds SweetSailor Families, Kids and Pets Afloat 24 03-09-2008 09:36
Portlight Gasket Help markpj23 Construction, Maintenance & Refit 8 05-05-2006 10:31



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:22.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.