Sizing of joists for a jetty

[martinradbo]

Possible, but steel does not handle ice better, is likely harder to get in place, and is difficult to attach the dock deck to.

Yes, nothing is obvious. I think getting it in place will be resolved, but the fact that steel is a pain to screw into compared with wood is definitely a factor. For the dock deck, it would have to be that you attach wooden beams on top of the steel beam.

 

[Thomas_Blekinge]

Place the telephone poles on pallets on land to test the deflection. Keep in mind that the decking also weighs a lot. You might need three poles in parallel or at least 28 mm planks.

Also consider the lateral deflection. If you stand in the middle of the dock, it can sway a bit. Cross bracing from land to half the length is good to have.

 

[martinradbo]

Place the telephone poles on pallets on land to test the flex. Keep in mind that the decking also weighs a bit. You might need three poles in parallel or at least 28 mm planks. Also consider the lateral flex. If you're standing in the middle of the dock, it can sway a bit. Cross braces from land to halfway along are good to have.

The idea is 34 x 145 decking, maybe even 45 mm thick.

34 x 145 weighs about 250 kg for the entire dock. There will be some other wood as well, so let's say 300 kg evenly distributed. To this, add 6 adults, about 500 kg. They might be standing and chatting in the middle of the dock too.

How to calculate that in this context is for someone else to answer. Most tables and the like assume a very narrow range regarding deflection. In my case, it's fine if it sways a bit if 6 adults decide to stand and jump in the middle of the dock. ;-)

A reasonable level is simply what I'm looking for.

 

[Thomas_Blekinge]

if now 6 adults decide to stand at the same time

And imagine if they each have a beer in hand! And then comes the mother-in-law!

 

[Kane]

And then the mother-in-law comes!

22x95 is my vote then......🥸

 

[z_bumbi]

You can splice regular studs if it is easier to get them to the construction site. Not particularly difficult and you can easily increase the width of the beams.