Bunk configuration

[Projectmach1]

Hey y'all. I picked up this project boat last winter. It is a 92 Mach1 concorde at 27ft. The previous owner put it on a triple axle loadmaster aluminum trailer, but the trailer is not set up for this boat at all. It looks like the trailer was originally set up for a cabin cruiser most likely. Currently the main bunks are mounted on top of the I-beams and that is way too wide. The problem I have is once I move the bunks inward, there will need to be something for the bunks to sit on and I just don't know what I would use to take up that space. I'm pretty much doing a full resto on the boat and doing a good amount of work on the trailer as well. Unfortunately, buying a different trailer is not an option. Any ideas will be much appreciated. Thanks.

 

[Scott06]

Your bunks need to come inboard just outside the flat steps in the deadrise of the hull.
my magic tilt uses taller vertical bunks like these https://www.easternmarine.com/magic-tilt-carpeted-cypress-boat-trailer-bunk-board-pt5150

there are 90 brakets that bolt them to the cross braces like found on this page https://www.easternmarine.com/boat-trailer-bunk-brackets-hardware

id call a place like eastern marine send them the pics they should be able to set you up and make recommendations

youd end up with something that looks like this bunk configuration https://magictilt.com/aluminum-trailer/als-series-triple-axle-aluminum/

 

[Projectmach1]

Your bunks need to come inboard just outside the flat steps in the deadrise of the hull.
my magic tilt uses taller vertical bunks like these https://www.easternmarine.com/magic-tilt-carpeted-cypress-boat-trailer-bunk-board-pt5150

there are 90 brakets that bolt them to the cross braces like found on this page https://www.easternmarine.com/boat-trailer-bunk-brackets-hardware

id call a place like eastern marine send them the pics they should be able to set you up and make recommendations

youd end up with something that looks like this bunk configuration https://magictilt.com/aluminum-trailer/als-series-triple-axle-aluminum/

The bunks currently on there are roughly 5x10 and sitting flat on the 8 inch I-beam. They need to move inward on the same horizontal plane which would leave an eight inch gap to be filled. I've noticed on the link of the trailer you posted and some others I've seen that it looks like the bunks are not sitting flat on the cross members. Is this an accepted norm? I'm fairly new to boat trailer set up, but I always like to have the load as firmly planted on the trailer as I can get it. Having the bunks elevated in the brackets seem to be a weak point to me, especially given the size of the boat. Are through bolts used for attaching the bunks to the brackets?

 

[Scott06]

The bunks currently on there are roughly 5x10 and sitting flat on the 8 inch I-beam. They need to move inward on the same horizontal plane which would leave an eight inch gap to be filled. I've noticed on the link of the trailer you posted and some others I've seen that it looks like the bunks are not sitting flat on the cross members. Is this an accepted norm? I'm fairly new to boat trailer set up, but I always like to have the load as firmly planted on the trailer as I can get it. Having the bunks elevated in the brackets seem to be a weak point to me, especially given the size of the boat. Are through bolts used for attaching the bunks to the brackets?

Yes the brackets hold them up off the cross members with through bolts. Ive seen this much more common than what you have where the bunk rests on the frame rail.

 

[Projectmach1]

Yes the brackets hold them up off the cross members with through bolts. Ive seen this much more common than what you have where the bunk rests on the frame rail.

Ohhh, ok. Thanks for the info! I think this trailer was originally set up for a cabin cruiser since the bunks are set so wide. I hadn't looked at the trailer for my last boat that closely and I just assumed that the bunks should be set flat on frame. This helps out a lot.