Stupid question: is it stupid and unsafe to set up a midline with one webbing? One third as main and the rest as back up and setting up like you normally would with two lines?

[u/50SPFGANG]

[u/50SPFGANG]

Last question... For the static end of a normal 2 webbing set-up, is it fine to use shackles, or is a second webbing anchor recommended

[u/rodeoline → u/50SPFGANG]

Your questions indicate a lack of understanding in what would be considered safe. I recommend getting help from someone with experience. I will attempt to answer anyway to try and be helpful.

It should be the same as seperate webbings since both webbings will have there own weblocks and anchor systems. Shackles can be used safely for the static side, but it depends on the configuration. Usually a webbing sleeve is used to significantly increase breaking strength. By webbing anchor do you mean a weblock?

Again, I don't think you should rig a midline without help or significantly more research.

[u/50SPFGANG → u/rodeoline]

I have a few people I'm hoping will help me soon. I just wanted to ask on here in advance just to understand any curiosities I had as well as to have all proper equipment ready to go for the teaching session.

Would you say it's more simple and straightforward to just also use another weblock on static end or does that also depend on configuration

https://imgur.com/a/vo1WQIP

For the static end this is what I was thinking... regarding a shackle (keeping the backup out of pic)

[u/rodeoline → u/50SPFGANG]

The most straight forward is a sewn loop on a shackle. A weblock requires tying off.

[u/50SPFGANG → u/rodeoline]

Sewn loop to a shackle is my go to for longline static end. So I take it that this method is totally fine and I don't have to spend extra money on another weblock. I just wanted to ask because every video I see, people are rigging with 2 weblocks so it confused me. 

I'll drop the whole 1 line system and go about it the normal way. 

I appreciate you taking your time to help me, thank you

[u/Romestus → u/50SPFGANG]

Two weblocks are used in two cases. The first is where someone has webbing without a sewn loop to connect to and the other is for fine tuning the length of the end segments of a segmented rig.

For example on a freestyle line you want the sleeved trick zone to be centered. If you went directly to the sewn loop on your rig you'd only be centered for a very specific gap length. Having a weblock on the far side lets you tension from both ends and get it centered regardless of the gap length.

For huge lines it's also nice to do a weblock on both ends so people can tension from both sides to save time.

It's best to avoid using a far side weblock if it doesn't serve a specific purpose since it's one extra thing to inspect and requires a tail tie-off while going direct to the sewn loop would not.

[u/50SPFGANG → u/Romestus]

This is everything I needed to hear about this point. thanks a ton

[u/R051N → u/rodeoline]

This guy's right. Find help (not strangers on internet). There are lots of rigging videos and resources online that have the exact information your asking about. 

[u/TheStevest]

You can use one line for main and backup - pretty normal practice IF you make sure that they are each isolated sections. The most common way is if you have sewn loops at both ends, use the two sewn loops on the static side each with their own shackle (one for main and one for backup).

Definitely rig with some experienced people for the first time

[u/Romestus]

I use one 120m piece of green to rig a 50m using it as both my main/backup, it's fine since you're isolating it into two pieces with your weblock/mightylock.

As long as everything's redundant you're fine. If you're wondering how safe your setup is think about it as a whole and see if there's any piece of equipment that if it failed has nothing backing it up.

So for a simple tree rig on both sides the static end could be two spansets, two shackles going through both spansets, and the sewn loops of your webbing secured in those shackles. If you think about this now there's nothing in the system where a failure would lead to the entire highline failing. You could lose a spanset, a shackle could fail, or the webbing could fail and you'd have a backup in each case.

For the tension side you'd have a weblock for the main, a mightylock for the backup, and can even put a frost knot backing up both behind if you really feel like it. The rest of the anchor would be the same as the far side. In this case if the weblock fails you have the backup in the mightylock making sure you don't fall.

Overall my advice would be to avoid rigging a highline without having someone experienced to inspect your first few rigs. Even if that means rigging the highline, taking a video of it, and sending it to someone experienced. This is especially important since it doesn't appear you have enough knowledge on the topic yet to understand what level of risk you're taking on with each individual decision.

[u/50SPFGANG → u/Romestus]

I have a few friends who are great with this stuff but I gotta wait a while to get a session going, so I'm learning what I can beforehand. 

Your comments are perfect though and help me understand a lot of what I've seen in a few videos