drumbeater Posted October 24, 2020 Report Share Posted October 24, 2020 I set my bunks at 38” o.c. like said in earlier posts. Set the angle to approximate deadrise. Problem is the boat is setting on the hull strakes on the front and center. I can’t move them further inwards because of the transducer in front of the first step. Should I go outboard of the strake, to about 44”o.c.? That would hit the flat part of the hull, but be just outside (maybe the edge) of the stringers. Having said that, the stringers do get closer together nearer the bow. Quote Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted October 24, 2020 Report Share Posted October 24, 2020 I'm confused about the strakes. Are they hidden by the bunks? Looks like the only thing supporting your entire boat is four little areas of the steps. Quote Link to comment Share on other sites More sharing options...
drumbeater Posted October 24, 2020 Author Report Share Posted October 24, 2020 13 minutes ago, SCFD rtrd. said: I'm confused about the strakes. Are they hidden by the bunks? Looks like the only thing supporting your entire boat is four little areas of the steps. The strake is setting right on top of the bunk. You have to look real close in the second picture, but you can see daylight through it. Definately not how it should sit I dont think. Quote Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted October 25, 2020 Report Share Posted October 25, 2020 You need to build-up the existing alum. bunks to evenly carry the weight of the boat. The drawing may explain how the bunks should look. In the front, you could leave a void space in the bunk to allow for the transducer. This would allow you to move the bunks in at the front to follow the contour of the stringers. I think I have pics of how I modified my bunks, to accommodate the single step on my 23 HPS, will look for them. Quote Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted October 25, 2020 Report Share Posted October 25, 2020 Here is an example of modifying existing bunks for a single step boat with two different levels to support the hull. For a two step hull, you would have three different levels Quote Link to comment Share on other sites More sharing options...
jh141 Posted October 26, 2020 Report Share Posted October 26, 2020 On 10/24/2020 at 4:04 PM, drumbeater said: I set my bunks at 38” o.c. like said in earlier posts. Set the angle to approximate deadrise. Problem is the boat is setting on the hull strakes on the front and center. I can’t move them further inwards because of the transducer in front of the first step. Should I go outboard of the strake, to about 44”o.c.? That would hit the flat part of the hull, but be just outside (maybe the edge) of the stringers. Having said that, the stringers do get closer together nearer the bow. I think if I were you I would make a jig ( or pay some really smart person to do it ) to fit the bottom of the boat where you want the stringers to support it.. Then use the jig to properly modify and setup my bunks Like SCFD did for his single step. I just cringe when I see the steps holding the weight of the boat. Seems to me that not getting the bunks right the other way could be bad to. I could be completely wrong on this. Maybe someone with an engineering education could shed some light on these step hulls Quote Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted October 27, 2020 Report Share Posted October 27, 2020 Not an engineer, but the OP has a rig that weights about 5,000 lbs loaded, sitting on four areas that are smaller than the size of your hand. So, each small area is supporting about 1,250 lbs. Quote Link to comment Share on other sites More sharing options...
drumbeater Posted October 28, 2020 Author Report Share Posted October 28, 2020 I got this from the lift manufacturer. Quote Link to comment Share on other sites More sharing options...
Jason Smith Posted November 23, 2020 Report Share Posted November 23, 2020 What lift manufacturer has those step hull build up pieces? Quote Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted November 24, 2020 Report Share Posted November 24, 2020 Very nice drumbeater. Everything is supported. I didn't know they had manufactured pieces for stepped hulls. Good find. Quote Link to comment Share on other sites More sharing options...
drumbeater Posted November 25, 2020 Author Report Share Posted November 25, 2020 I haven't purchased them yet ,that was a picture they sent me. It is a US Boat Lifts lift. Seem like good people. Quote Link to comment Share on other sites More sharing options...
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