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Old 04 December 2008, 14:08   #11
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Country: USA
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Boat name: Water Dog
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1) Let's see if we can measure the thickness of the anchor locker wall with calipers.

2) If the back floor was think enough for the 8 tank rack, I'm thinking the forward floor will be thick enough for a 4 tank rack.
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Old 05 December 2008, 17:43   #12
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Why not get some top hat fittings made like the ones I had done for mounting my rear bench seat.

http://rib.net/forum/attachment.php?...2&d=1177191945

I got 6 x 3" dia disks of 3mm Stainless then had a 30mm long piece of 20mm dia. stainless roundbar welded onto the center of each disk.

Then each disk had a hole drilled and tapped for a 10mm SS bolt going through the center of each disk and into the roundbar to a depth of about 20mm leaving the roundbar sealed off at the end.

Then each disk has 4 x countersunk holes drilled around the disk that are sized to take no12 CSK SS self tappers.

Then you just drill a 25mm hole in the deck to take teh roundbar and the 4 holes for the self tappers and screw the whole things down with lots of Sika.

Very strong and worked a treat !
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Old 09 December 2008, 11:06   #13
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Lag bolts work

Looks like the floor up front is ~20 mm thick. Fiberglass and plywood.

We lag bolted the rack in place, I'll post some pics when I take them this weekend.

Took the boat out and moving ~100 kg of tanks forward really helped in terms of the way the boat sits in the water.
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Old 29 December 2008, 16:51   #14
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update-pics of rack

So, here is the final product, it works great, wish I could say the same about my outboard.
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