Storing boats on racks in a container

[Antony]

So, I’m thinking in response to a rack storage issue that rather than worry about calculating the strength of a channel across it’s minor axis we look at things a different way…

first to answer the failure question:

Mostly these questions are answered by testing, and publishing in allowable loads tables. They can be done by calculation, but it not as simple as what people are thinking. I’ve not done it for many years, so won’t embarrass myself here 🙂

I dug up a load table set though. this is one I found for Duragal.

https://s0.whitepages.com.au/51f25554-bae8-40a2-bfd3-709b02f8f313/austube-mills-document.pdf
As there is no limits published for channel about their short axis, I’d use angle about their short axis and assume the load is 1.5 see (section 14). I’m not convinced you’ll get your desired span.

Rather than long ramps and all the associated storage issues with them, Has anyone considered either a unistrut track and chain block or a swinging arm hoist mount that runs across the container (with unistrut block to get the thing centred)?

this is the concept being used for pallets: https://www.tawi.com/wp-content/uploads/2019/02/ScreenShot002.jpg

You pick up the boat outside the container, and slide the assembly in, at which time you can close the door. if you like, the boat can be lowered onto racks as prevoisly mentioned by John

Unistrut would be strong enough to lift and slide a laser no dramas, and a swing type mount would have 2.5. span, so plenty of reach for a 4.4m boat.

Bunnings sell a swing type that is close, but the top tension rail might be a deal killer for height: https://www.bunnings.com.au/gorilla-1100mm-hoist-swing-arm_p0036288

Easily fabricated though.

Boat needs a lifting bridle nomatter what. Less work than dragging up an incline!

Thoughts?

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