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13th Dec 2013, 02:48 PM #1
How to work out what weight to be carried
Hi,
Just wondering is there a method for working out what thickness wall and what dimensions steel I should use against the weight of the gear I want it to carry?
I'm thinking of making a boat rack for for my tinny to go on my camp trailer for trips away. I wouldn't know exactly how much the boat weighs, but I'm tipping somewhere in the 60-70kg mark and I'm just wondering what size steel tubing I should use to build it.
I want to build it with gussets in the corners for added strength also, and I'm curious if there is some sort of formula I could follow to help me select the outer dimensions of the tube and also the wall size?
Any advice would be greatly appreciated.
Thanks
Geoff
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13th Dec 2013, 06:41 PM #2Philomath in training
- Join Date
- Oct 2011
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- Norwood-ish, Adelaide
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You might be better asking that question in the trailer section
TRAILERS & OTHER FABRICATED STUFF
Michael
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13th Dec 2013, 07:58 PM #3Most Valued Member
- Join Date
- Jul 2010
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Rather diagonal bracing that gussets.
I built a roof rack for a mates 4WD (roof top camper thingy).
I was never completely happy with the result. But at the time couldnt come up with an idea to fix it I was happy with either. I said I think it will be ok, but if its going to fail it will fail right there.... Well I was wrong and right
With some rope work he did manage to finish his trip(across one of the deserts) and get home, though by the time he got there 3 of the 4 joints I wasnt happy about had failed. Pitty that it was a good looking rack otherwise lol. They did say the roads were shocking....... but still.
So first thing to think about would be "where are you planning on going?"
Stuart
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16th Dec 2013, 01:41 PM #4
Hi Stu,
Just flat road and caravan parks mate.
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18th Dec 2013, 08:59 PM #5
Of course how its constructed will have a bearing on things.
If it was me building it I would go for 40 x 40. 2mm wall would be plenty.Frisky wife, happy life. Then I woke up. Oh well it was fun while it lasted.From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".
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18th Dec 2013, 10:53 PM #6
Thanks for the advice.
I was thinking 35x35 1.6 with a 30x30 1.6 to telescope the 35x35.
I was kind'a thinking I'd like to match something similar to the picture
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18th Dec 2013, 10:55 PM #7
Or like this and add one of them baskets from ebay or supercheap auto with some U bolts
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