Yup perfectly. I have done this to most of the deck hardware that I have removed already. Luckily they removed the core and made a solid fiberglass layup under the cleats, winches and blocks so i dont need to touch those. For the granny bars I was considering cutting away the interior of the coach roof underneath the installation points and laminating pieces of solid 3/4 G-10 behind the fasteners with epoxy and drilling through that. I was thinking I would then add large washers or a backing plate behind those and bolt right through the entire thing. The vinyl headliner has zippers installed so I can get access to most of that area without destroying the headliner.I can't really tell on your Mariner 36 how you would install the granny bars, but you'll figure out the design that works on the outside. That boat has a cored deck. So when you drill through for the attachments, make a slightly oversized hole. Then make a L shaped cutter you can put in a drill or your tool of choice that can cut out the core between the top and bottom fiberglass. Then using some kind of backing like tape on the inside. Fill the entire space with structural epoxy. Once set, drill the hole through that epoxy "plug" for your fasteners. Use either fender washers or make a backing plate on the inside for the nuts.
That way you create a sealed structure so there can be no water ingress into the coring and you are making a structural connection point across that cored structure. Does this make sense?
dj
Would you be laminating to the top fiberglass layer? Not sure which is easier..both would work.Yup perfectly. I have done this to most of the deck hardware that I have removed already. Luckily they removed the core and made a solid fiberglass layup under the cleats, winches and blocks so i dont need to touch those. For the granny bars I was considering cutting away the interior of the coach roof underneath the installation points and laminating pieces of solid 3/4 G-10 behind the fasteners with epoxy and drilling through that. I was thinking I would then add large washers or a backing plate behind those and bolt right through the entire thing. The vinyl headliner has zippers installed so I can get access to most of that area without destroying the headliner.
Ha! no worries. Thank you for the info. I'm not ready to add them yet anyways. Actually, I have seen tons of pics of them but had no idea what height would be best. Are you happy with the height/width and distance of yours or would you change any of those parameters?Seems my Internet connection isn't good enough to drop in images. I'll try later...
dj
Yeah, it may be overkill to cut away the interior roof and add solid G-10 like I described. Not to mention a LOT of work. If I have enough mounting points, drill and fill with a big aluminum or stainless backing plate might be plenty strong and a lot easier. Not ready to do the project so lots of time to think about it.Would you be laminating to the top fiberglass layer? Not sure which is easier..both would work.
dj