Slack in rope

[photoatdv]

Does anyone know why there would be slack in the purchase line of a counterweight lineset? There is only one that I've ever noticed this problem with- the main curtain. I think it happened amidst a near disaster where main and valence fouled and we had several near runaways where all 4 of us had to grab the rope. Somewhere in the middle of this it suddenly went slack- the floor block moved up, and I thought it went back down, but I guess not all the way...

Is this anything to worry about? Based on my experiece/ basic knowledge of the flysystem setup it doesn't seem like there could be a real problem-- but I thought I'd ask to be sure.

How do I fix this? Feel free to PM me on this one if you don't want to post it-- Though I'm thinking this falls under normal use and maintnance and is okay.

[derekleffew]

The primary purpose of a floating floor block is to account for rope length changes due to humidity. Is this a hemp line? Have all the rigging, particularly the knots, inspected by a professional.

Be safe, rig right!

[photoatdv]

No it's counterweight-

"why there would be slack in the purchase line of a counterweight lineset"

The only knots on our flies are on the purchase line.


I guess I wasn't very clear- I know the problem is with the floor block b/c I know it can go lower. The real question I guess is why is the floor block not providing tension.

[Charc]

Originally Posted by photoatdv

No it's counterweight-

"why there would be slack in the purchase line of a counterweight lineset"

The only knots on our flies are on the purchase line.


I guess I wasn't very clear- I know the problem is with the floor block b/c I know it can go lower. The real question I guess is why is the floor block not providing tension.

Spring popped loose on your near runaway?

[derekleffew]

Originally Posted by derekleffew

...Is this a hemp line?...

Originally Posted by photoatdv

No it's counterweight- ...

Please allow me to rephrase: Of what material is the purchase line of the counterweight arbor in question?

Is the floor block a kick block or gravity block? Is the arbor on a lattice track or T-track?

[photoatdv]

Charc- Don't know what you are talking about . I've never done anything with the floor blocks and I guess don't really understand how they work beyond providing tension.

Derek- -Sorry, I *think* the purchase line is some type of synthetic. I don't have any specs for it to tell you exactally

- What is the difference between a kick block and gravity? My assumption was that gravity pulls down the block providing tension, but I may be wrong.

- The track is the kind where the back of the arbor fits between two metal pieces which are attached to the wall. (I'm thinking that is T- track but please enlighten me on the diferences)

[Charc]

Originally Posted by photoatdv

Charc- Don't know what you are talking about . I've never done anything with the floor blocks and I guess don't really understand how they work beyond providing tension.

Derek- -Sorry, I *think* the purchase line is some type of synthetic. I don't have any specs for it to tell you exactally

- What is the difference between a kick block and gravity? My assumption was that gravity pulls down the block providing tension, but I may be wrong.

- The track is the kind where the back of the arbor fits between two metal pieces which are attached to the wall. (I'm thinking that is T- track but please enlighten me on the diferences)

I don't know what's going on either, I can't follow threads at neigh 4AM, I just threw that out there, I should turn in.

[photoatdv]

True we probably shouldn't be trying to figure out rigging in the wee hours of the morning.

[gafftaper]

The questions Derek is asking are to determine if your rope has stretched or if your tensioning system is not working correctly. Those are the two ways you can develop this problem.

You need to have your system inspected and get some training. You should not be having "several" near runaways. People get KILLED with runaways. Did you hear me? KILLED as in DEAD. If you have had "several" near runaways either there are major problems with your system that need immediate repair before it is used again or your crew does not know how to safely operate your system and you all need training before you use it again. Either way you need a full inspection with training. You should NEVER get in a situation where 4 people have to grab a rope... that's EXTREMELY dangerous... another member here has told the story several times about the tech who ripped the skin off his hand doing that.

I don't mean to insult you with this post, but your questions show you do not know what you are doing. People who don't know what they are doing have no business running a fly system. It's the by far the most dangerous thing in tech theater. If you walked up to the dimmer rack and saw a bunch of big fat bare wires you would say... hmm that's dangerous I better not touch it. Well when you fly things you are not just endangering yourself but everyone around you as well. Get some training and a service call to inspect and repair your system before someone gets killed... until then Don't Touch!

[photoatdv]

Gaff,
The reason that we had the near runaways was because the two fouled essintially creating a dynamic load as the weight shifted between the two battons. I might have exagerated about several there were really just 2 times we nearly lost them-- before we realized they fouled. We were a lot more careful once we realized there was a problem.

We(by we I mean the student-professionals and professionals-- I've yelled at junior crew enough times for that) NEVER leave a lineset out of weight enough that it takes more than one person to handle.