Pulling Loads with Piling Rigs

What then is the aux wire rope design to do? Then to position the piling in place. The force taken to slide the piling across the ground would not be as much as the hung load unless the piling hung up. I would thing the rig designers would have incorporated some type of fail safe so the these auxiliary lift cables would not have the force to pull the structure over.

In my mind, I am picturing your "rig" as a drilling Derick of sorts ... If I am assuming correctly, please keep in mind that structures such as this are very strong when used as they were intended. VERTICAL LIFTS...

I couldn't begin to tell you the things that I have seen done with a Derick other than vertical lifts, but that does not make it right or safe.

Another major safety point is your cable rigging. The shivs (pulleys) must not be side loaded. Be absolutely positive the rigging can tilt and swivel in the direction it is pulling.

No sense in stating not to overload the cable, winch, etc, bla bla bla.

When you are working "out side the box" as you obviously are, there is no substitute for experience. I've never seen a book or a class for things that do work but should not be done unless you know exactly what your doing...

I too do not know what the manual says, but I have seen several rigs working during Cochin Shipyard construction and never any accident, in three years, while pulling piles along the ground. Riggers must be experienced enough to do so safely.

Lifting Tackles such as Cranes, Hoists etc. are supposed to lift only vertically. Horizontal pulling of the load is not at all permitted but on site so many such things happen which many a times get away without any accidents. Actually angular load on the wire rope and equipment increases the effort for which they are designed.

You guys are all FOS. Cranes that are utilized for pile driving and are equiped with third lines have booms, boom heads, and sheaves (not shivs - that's slang for a knife) that are fitted and designed to take the loads that are consistent with pile driving.

For example, if the piles are to be driven in a battered alignment (tilted), there are significant lateral loads placed on all of the boom elements, to say nothing of the shock loads that are transmitted to the boom and components on account of the action of the driver, whether it is air/steam or diesel. These loads can be significantly higher that those that would result from retrieving piles from a stack or laydown area.

What you aretalking aboutis a DRAGLINE CRANE fitted with a PILE DRIVER. What I was talking about if you read close was a DERICK with CONVENTIONAL LIFTING TACKLE.

We might also say, "FOS" winches may be used to pull in any direction...

Thanks for the spell check by the way. Every now and then, late at night or early morning miystaykess hayopeyn

Are you talking about the axillary cable that is used when using a drag bucket? If so no problem.

The third line on a crane has nothing to do with dragline operation. Draglines utilize one of the two drums, with the cable threaded through a fair-lead for 'dragging' the bucket. The third drum is a smaller, lower-capacity drum for use primarily in pile driving work.

I'm not sure how a 'derrick' is any different from a crane. Cranes can be mounted on any carriage, whether it is crawlers, truck, gantry, rail, turret, etc. In fact, what you are calling a derrick is very likely what is often built on a marine barge and has much heavier components than a typical land crane on account of its usage.