93 Crownline 196 deck and more

[JASinIL2006]

Re: 93 Crownline 196 deck and more

Is that pressure treated lumber?

 

[atjohnson]

Re: 93 Crownline 196 deck and more

Yes, it is treated lumber.

 

[JASinIL2006]

Re: 93 Crownline 196 deck and more

I recall reading some stuff about possible problems glassing over PT lumber... I don't remember if the problem is the PT chemicals interfering with bonding from the resin, or if it's just the high moisture levels found in PT wood (until it's thoroughly dried) that mess up adherence of resin.

I don't know that PT wood buys you that much insurance anyway. For most PT wood, the preservative only reaches the outer layers of the wood anyway. Any working of the pieces that exposes the inner section of the wood (e.g., cutting, drilling holes for fasteners) pretty much defeats the protection afforded by pressure treating. You can buy some (highly-toxic) end-grain preservative to brush on you PT lumber to treat the cuts, but I have no idea what that might do to the resin adhering to your pieces.

I'd do some checking around, if you haven't already, on the use of PT wood in this application. I think most folks here use standard kiln-dried, non-PT wood for structure.

Jim

 

[Woodonglass]

Re: 93 Crownline 196 deck and more

If you don't use CSM on the initial wrap, pre-installation, WOG, are you now suggesting 1708 prior to it's installation?

CSM on the backside to help with waterproofing. NO 1708 on the backside. 2 full layers of 1708 on the front side. The CSM on the 1708 is adequate. According to the the MFG. and techs that I've been talking with lately. They've convinced me. But that's just me. Not saying everyone should take my advice. It just made sense to me that it was a waste of resin and material. Take it for what you paid for it.

 

[Woodonglass]

Re: 93 Crownline 196 deck and more

If the PT wood was thoroughly dry then the resin will prolly be ok. IF not then you might have some delam issues. Time will tell. If it was freshyly bought from the lumber yard, and it was fairly new at the yard, then... you will prolly have issues. It can take several weeks for it to dry.

 

[atjohnson]

Re: 93 Crownline 196 deck and more

I had actually read similar responses about the moisture content of the wood, but not about reactions to some of the chemicals. I based my assumptions on dryness because I purchased the wood about 2 weeks ago and the limited number of building project in my area this time of year. I also did some small core samples to see how moist the shavings were along with other properties from buying wood in the past such as how the wood looked after making cuts and some small splits from sitting. I am in no way claiming to be an expert, I just tried to use good judgement before using the 4x4s.

 

[atjohnson]

Re: 93 Crownline 196 deck and more

I had not intended on having much time this week, but things worked out yesterday and I was able to get the transom PBed in.

It took slightly more PB than I figured so I did not get to install the backing plates for the anchor points or swim ladder but no big deal because I'm already further than I had planned for the weekend before it starts. I started evened the layer of PB with the trowel, but ended up doing most of the spreading with my hand because it was faster. The install overall went pretty smooth. I had to find help when I was putting the clamps in, but other than that there was really no need for a second person this time. I hope to get the backing plates installed and both layers of 1708 on no later than mid day Saturday. Of course this depends on how much I get to do Friday as well. I am moving along slowly, but at least I'm moving.

 

[bvetter]

Re: 93 Crownline 196 deck and more

Very nice!

 

[JASinIL2006]

Re: 93 Crownline 196 deck and more

Great work! Getting the transom in feels pretty good, I bet!

 

[atjohnson]

Re: 93 Crownline 196 deck and more

I may have asked this but couldn't find it. Do I need to put a gap between the engine mounts and hull when bedding them in like you would do on the stringers? The originals were directly on the hull with no PB or glue.

 

[atjohnson]

Re: 93 Crownline 196 deck and more

Ok guys, got both layers of 1708 and all of the backing plates in with a little help from a friend. I did have a few spots that I was a little disappointed with because of all of the complicated bends and turns but for the first time glassing a larger area, I am not going to complain.

With any luck tomorrow, I hope to get the eninge mounts at least PBed in. I still need to put a weep hole in the mounts before I'm ready but should be a quick fix. I have chosen to put a gap under the mounts like bedding stringers but I have to watch the height of it and keep an eye on the level to ensure they stay on plane. Will try to update on the progress tomorrow if I can.

 

[atjohnson]

Re: 93 Crownline 196 deck and more

Temperatures kept me from doing any glass work so I had to alter my plans a little. I got my father in law to come over and we started cutting some stringers. I actually think this approach is going to work better anyway. We were able to get four longer stringers cut in the rear as well as the back wall of the gas tank compartment. The tank compartment piece was a pain. Had to make a cardboard template like on the transom. The front will be just as bad because the other will not work as a guide because the hull slightly changes pitch.

I hope to get a lot of the stringer mock up done this week because I will be out of town a total of 3 weeks within the next month and a half so it's really going to cut into my progress. I will just try to make the best out of it.

 

[bvetter]

Re: 93 Crownline 196 deck and more

Lookin' good!

 

[Woodonglass]

Re: 93 Crownline 196 deck and more

You want to bed the Motor Mounts in PB just like you would stringers. I'd also recommend that you encase them in 4 layers of 1708 instead of 2 layers like stringers. The added bulk will ensure they'll hold up to the added weight and torque of the motor.

 

[atjohnson]

Re: 93 Crownline 196 deck and more

Thanks guys. WOG- After finding that fiberglass was pretty much the only support I had left due to the amount of rot that I had, I will not mind wrapping the mounts 4 times at all. It definitely makes you realize the importance of the layers.

 

[Sashav]

Re: 93 Crownline 196 deck and more

Looks like you are progressing, good work. It will look better after you put the glass.

 

[atjohnson]

Re: 93 Crownline 196 deck and more

I managed to get a few more stringers cut today. It really doesn't seem like much but took me a little while to finish the front of the gas tank as I expected.

I think at this point, I think I am going to stop and PB in everything that I currently have because several pieces are rough cut and my fillet where the transom meets the hull is slightly interfering with the fit in two places. If I clean this up, I can be sure that everything is plumb and square before proceeding to the front portion. My biggest hold up is weather. I've tried to avoid fuming up the shop but I'm running out of time and really need to move on. It is looking good for the weekend but we will see if it holds.

 

[atjohnson]

Re: 93 Crownline 196 deck and more

Well I have had a productive weekend and Monday night. Started off Saturday by getting my engine mounts PBed in.

Most of my measurements were dependent upon getting these in first so I started here. My only problem Saturday was that the temp never got above 55 so with the heater running, it took forever for the PB to kick off. I was able to get all of the other stringers that I had cut soaked in resin but just like the PB, drying times were horrible.
Luckily Sunday the temps got to almost 70 and had high 70s this afternoon. With good weather and the help of my dad and father in law. I was able to get a decent amount covered.

I ran out of time tonight or I probably would have tried to get a little more done. Looks like I will be out of town most of the week and half of the weekend so it will be slow moving for next weekend if I even get to work any. I will update if I make any progress.

 

[bvetter]

Re: 93 Crownline 196 deck and more

That sure is some nice PB'ing! Feels good making forward progress doesn't it!

 

[atjohnson]

Re: 93 Crownline 196 deck and more

Thanks bvetter. Yes it feels very good to get some visible progress. Too bad I am still at the same point a week later. I'm hoping for a few free afternoons this week so I can at least get the few final pieces that I have made PBed in.