Tips and Tricks of flatbedding

The wire rope on a crane spool has a better anchor point than a strap partially through a spool.

Unwind the cable to the end of a spool, right up to the anchor. It will hold the weight of the cable. A strap won't do that.

 

Count me in as a short strapper...no issues ever

 

Do we need a disputes of flatbedding thread?

 

Lol, this dispute always comes up every so-often. No big deal.

 

No it doesn’t, it’s held by a wire clamp until it wraps. Crane manufacturers have a minimum number of wraps required to be on the drum.

 

So a crane manufactur s requirements are important but a winch manufacturer are not? Ok.

 

No your twisting my words, the reason wire rope stays on the drum is friction caused by multiple wraps not a mechanical connection. The same thing applies to straps on a winch, you wrap that strap around a couple revolutions you’ll pull the strap in two before it slips of the spool.

 

This would be a non issue if three bar wenches were more common, until a bunch of mouth breathing idiots screwed those up too many times

 

Am I twisting your words? The drum on the crane isn't only relying only on having the cable spooled around the drum multiple times to increase friction enough to hold the weight. It has an anchor, as does a strap winch.

You only want to "anchor" the strap in a winch halfway, halfway bieng conservative here. Try only securing the cable anchor of the crane halfway. Sure, it will probably get by for a while, but the possibility for failure just went up quite a bit no?

Why even take the chance?

 

A crane drum absolutely relies on friction of the wraps, the mechanical connection is just to keep the cable in place to start that wrapping.

Here’s a screen shot from a video showing the process of wrapping a drum. Do you think that little block tightened with a wrench is going to hold that cable? Of course not, that’s why the manufacturer has recommended minimum number of wraps that have to be on the drum. The crane drum is 100% reliant on friction.