Hi,
What’s stronger\heavier? glassing a surfboard on the deck with one layer of 6oz cloth or with two layers of 4oz, by two layers of 4oz I mean a deck patch of four oz and another layer of cloth with the lap.
what works better for you guys?
Thanks,
TR
8oz(4+4 oz) is stronger than 6oz. Since it is a patch, weight differences would depend on how big your patch is. the whole thing kinda explains itself. if it were my board, I would go with double 4oz deck. only 6oz on the deck will not last long. I hope I read it correctly. good luck
I built a couple of boards this way (6oz on the deck only) and I think the result was very good.
I think the deck is not as strong as a standard lamination (2x 4oz) but the rails get stronger than normal glassing, and rails always get lots of dings in every boards.
Maybe its a good alternative, just curious if any of you guys have done it, i would like to know which board gets heavier (one layer of 6oz or two of 4oz) because in the boards i made the weight is almost the same, the 6oz on the deckgot just a bit lighter but no big diference.
Thanks
TR
I have done the 6oz and foudn it to be very light, but not as strong. I am 200 lbs. and have put a nice baseball size hole in the deck towards the rail from a wipeout which I don’t think would hvae happened if I did a 4x4 on the deck. I am making another board right now and will put 4x4 on it. I really don’t think it is going to make that much differnece in weight, but plenty in strength. I knew the sinlge 6oz was going to be weaker then 4x4, but I wanted to try it.
1 x 6 oz decks are pretty good, dont last forever, lighter and weaker than double 4 oz, 1 x 6 with 4 patches is ok, more strength but more weight, double 4 is happy medium.....dense foam means you can use less cloth...foam quality makes a big difference....
I use the warplite cloth from surf source because I get a great deal on it.For some reason a 4oz lam feels more ding resistant than a 6oz.I look at the cloths to compare and the 6oz is larger strands but a looser weave while the 4oz is smaller strands with a tighter weave.I even did 1 board with a double 4 deck and another with a double 6 deck over the same density eps blank both cut from the same block and I did not see much difference in ding resistance from the 2.There are alot of different fiberglass cloths out there so it really depends on what your supplier has to offer.deffinately look closely at the weave and strand thickness,just because they call it 6oz does not mean it will be more dent resistant,maybe just more snap resistant or stiff.
If you walk into any glass shop in Calif. with two shaped blanks; one shortboard, one longboard and do not specify the glassing schedule; You will most likly get a 6 and 4 deck, 6 bottom. Some glass shops do a double six deck and a six bottom on longboards. That is norm for the industry in Calif. Opinions otherwise are from people who have never had a blank glassed in a contract glass shop.
“That is norm for the industry in Calif. Opinions otherwise are from
people who have never had a blank glassed in a contract glass shop.”
Welcome to the world of opinions haha.
the 'Norm' isnt always right, in surfing and surfboards it is usually the most common but not always the ideal.......
HelloTR ,
I agree with Pridmore's comments. Please tell us what type of blank you are using.....I always use two layers of cloth on the deck.......... a polyurathane shortboard and a 2# EPS longboard get different glass jobs..........
backyard stuff....Stingray............
In my opinion norms are norms for one or more reasons. That we do not know and/or understand the reasons is often a cause for disagreeable opinions.
As to the original question: What is stronger/heavier - 1 @ 6 oz, 2 @ 4 oz?
Factual answer - depends.
Do you have both materials to work with or is this a question akin to what cloth should I get and use?
If you use two crappy layers of 4 oz put down with a horrible layup job then compare that to very good 6 oz material with an ideal resin ratio put down under tension or wice wersa your mileage will vary vildly. Know your chit and you could make the right single layer of 6 oz literally fly or 2 @ 4 oz layers as light as a single typical 6 oz hand layup.
On the other hand if you are a journeyman and use similar material (weave/count) put down the same way (technique/resin ratio) with the only primary difference being a jump from 4 to 6 oz then the answer you are probably looking for is:
2 @ 4 oz is the stronger deck option for a modest weight gain with the added benefit that two layers can often provide a smoother finish than a single 6 oz.
Depending on board size and use you might bump up to 1 @ 4 oz over 1 @ 6 oz then go to 2 @ 6 oz for bigger still as mentioned above.
Circling back to the question of your material selection, do you have both 4 oz and 6 oz to work with? What will be done on the bottom? 4 oz on the bottom does not a beater board make…
Remember - in laminating structural forms, layers can be your best friends. More layers, more friends. More friends, better parties. Too often, better parties, bigger headaches. Ogers have layers.
With same wave pattern, light fibers have less crimp so they have better mecanical properties. But multiple layers is not good for interlaminar shear resistance, that’s way in board building they use mat fiber between woven fiber.
Balanced plain wave twist fiber have the lowest mecanical performance but are easy to work and give a good finish.
Orientation of fiber is realy important too.
Sorry for my frenglish.
[quote="$1"]
Remember - in laminating structural forms, layers can be your best friends. More layers, more friends. More friends, better parties. Too often, better parties, bigger headaches. Ogers have layers.
[/quote]
Oh my god, this is a head spinner! Ogers surfboard too?