Vec stringers, construction and strength

[kiowapilot]

Are the stringers in a vec hull strong enough to hold lag screw? I need to mount a paragliding winch in my 03 glastron sx195 and to do so will require me to pre drill and install 4, 1/2" x 4" lag screws to hold it in place. Are the stringers strong enough to hold the screws in place? It is a non issue with wood construction but i dont know much about the vec hulls. Thanks.

 

[tpenfield]

Re: Vec stringers, construction and strength

I would expect it to hold about 1/2" of the 4" lag bolt. The rest will be into the core material

 

[CWKboat]

Re: Vec stringers, construction and strength

Are the stringers in a vec hull strong enough to hold lag screw? I need to mount a paragliding winch in my 03 glastron sx195 and to do so will require me to pre drill and install 4, 1/2" x 4" lag screws to hold it in place. Are the stringers strong enough to hold the screws in place? It is a non issue with wood construction but i dont know much about the vec hulls. Thanks.

http://forums.iboats.com/showthread.php?t=519142


My 2002 Larson 210 was an early VEC model and if you follow my thread you will see some photos of the stringers and floor cutback from the transom. I can tell you that, if your VEC is like my VEC, you have foam inside the stringers and some of the stringers float off the hull so to speak. Without knowing the stresses that your paragliding winch entails, my guess would be that you might want to think twice. (Don't let my thread scare you too much about VECs!).

 

[kiowapilot]

Re: Vec stringers, construction and strength

The pressure will be angular in nature and should max out at about 300 pounds.

 

[CWKboat]

Re: Vec stringers, construction and strength

Mine was foam, very light weight at that.

 

[ondarvr]

Re: Vec stringers, construction and strength

No, you need to reinforce that area, and possibly the surrounding area for it to hold up.

 

[kiowapilot]

Re: Vec stringers, construction and strength

What are you suggestions for reinforcement of that area. My initial thought is to take a 36" piece of steel flat bar and bolt it down to the stringer in about 6 places on both sides, then mount the winch to the plate. The winch mount is 12" wide so that would spread the load along the steel. Thoughts?

 

[ondarvr]

Re: Vec stringers, construction and strength

Lag bolts won't hold it in place for long, plus the floor and stringers aren't designed for that type of stress.

The boats I see built for this type of use have beefed up stringers and a way to solidly through bolt the mounting bracket in place.

 

[CaptainKickback]

Re: Vec stringers, construction and strength

I'm with ondarvr on the bolts. I believe your initial post said lag screws. You will be putting a lot of inconsistent or jerky stresses on this. So, screws will work loose before long. Screws No - Bolts Yes.

Sea ya...

 

[kiowapilot]

Re: Vec stringers, construction and strength

I will have to give that a shot. I need to remove the floor and see what is actually down there. If it is shaped like a beam running it will be easy to put C shaped aluminium in there and bolt in multiple places. If it is only accessable from one side then it will be a little more tricky. Time to tear it apart and see what I am dealing with.