Jen Rissa in MTK at last!!
Yes in this area the hull is certainly 3/4, but generally ,the thickness is between 3/8 to 1/2. 8 years ago, I changed all the through hull on my 79 sportfish, and i can assure that it's about 3/8 to 1/2, but could be more in particular area. -First in mold they build the hull 3/8- 1/2 - and after they build the stringer; which are glass over plywood the wood stringer is glassed over the hull on 5 to 10 inches (then it adds to the hull thickness about 1/4 to 3/8 more glass on hull) -after stringer, they put bulkhead, which bottom are glassed over the hull like stringer (1/4 more glass) Conclusion: hull is 3/8, but when you are near the stringer, hull is 3/8 + the stringer glass 1/4 to 3/8 = 5/8 to 3/4 if you are in the corner near a stringer and a bulkhead , hull thickness is 3/8 +stringer 1/4 to 3/8 +bulkhead glass 1/4 =7/8 to 1 inches IF the bertram hull are rock solid, this is because there is a lot of frame stringer every 25 30 inches and bulkhead 30 35 inches. like a an airplane.
Hull thickness for a 46 berty , from Pascoe (yachtsurvey) "Basically, these boats are everything we've said they are in other reviews. They are well engineered, and at 1000 lbs/ft. they are heavy boats, but they do not have the tremendously thick laminates that many people think they do. One guy told us his 31 is 1-1/2" thick on the bottom! I can assure you that Lee Dana, the chief designer at Bertram, was not interested in building tanks. I have seen three wrecked 46's lately, everything from hurricane damage to having their bottoms torn out on reefs. The hull average only about a 1/4" -3/16" on the sides and 1/2 to 5/8" inch on the bottom, which is not heavy by anyone's standard. What makes them different is that Bertrams are properly framed, unlike so many others where the objective seems to be to use as little framing as possible. Most of the weight in this boat comes from the tons of plywood used on the interiors."
