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Finally a Stringing Block for Line Angles!

The Angle Dolly

Innovative

The patented Angle Dolly is a new safety and labor-saving innovation for pulling through line angles.  It eliminates having to install small stringing or skookum blocks for the pulling rope, hard line or OHGW /OPGW and then stopping the pull to change them out to conductor stringing blocks. 

Easy To Use

Traditional blocks need to be physically fixed in a single angular position and watched like a hawk during the entire wire stringing process to make sure the rope, hard line or conductor does not jump out of the wheel and get hung up on the dolly frame. The Angle Dolly’s rollers prevent such issues.

Labor Saving

The rollers are utilized almost exclusively when the lighter pilot rope, hard line or OHGW/OPGW is being pulled.  Because the Angle Dolly is free to swing, when the conductor gets to the angle, it seats down in the groove once the pull gets going while the rollers provide protection against instances when the conductor temporarily jumps out of the groove.

Personnel no longer required to monitor and aerially clear wedged/jammed sheaves during the stringing process.

SAFETY

Personnel not required to be positioned in a bucket truck at each angle to hold out the stringing blocks.

20 minute savings per block by eliminating the need to stop the pull, change out a block and start the pull again.

SAVINGS

30 minute savings for each phase, fiber and/or static wire on each pull.

No Project Too Big Or Too Small

Project Type

Ave. Size, Single Ckt, New Construction

Ave. Size, Single Ckt, Reconductor

Large Size, Double Ckt, Reconductor

Large Size, Double Ckt, New Construction

Line Angles

15

15

45

45

Crew Size

15

15

18

18

Hourly Man/Equip Rate

$150

$250

$150

$250

# Angle Dolly Used

18

18

30

30

Total Savings per Angle Dolly Used

$4,000

$9,167

$19,440

$25,200

The Patented Angle Dolly: A Case Study

How would you like to improve safety by reducing risk, saving man-hours and shortening wire stringing schedules – all while producing significant cost savings?  That’s exactly what our new patented Angle Dolly does by virtually eliminating wedged ropes and hard lines, eliminating the need to change out skookum or X100 blocks and eliminating the need to hold out sheaves with ropes or temporary fixed arms during each wire pull at each and every angle structure.  

To demonstrate, the following is a summary of a single circuit 69 KV transmission line rebuild in the central United States.  The project replaced 4/0 copper with 336 kcmil T-2 conductor and 3#7 copperweld with 0.587” fiber optic shieldwire.  The project contained 15 line angles spread between 6 wire pulls.  The wire stringing crew consisted of 15 men at a loaded man+equipment rate of $150/MH.  Roughly four days were cut from the stringing schedule by not having to change out the stringing blocks at each structure and less time was needed for each pull by not having to slow down or stop the pulls at each angle structure.  The time savings do not take into account any time saved by not having to install temporary fixed arms or positioning a man and bucket truck at each angle structure to hold out the stringing block.  The $150/man-hour and 15-person crew size translated into a savings of over $90,000 for the project.  Eighteen Angle Dollies were used on the job, yielding a savings of more than $5,000 per Angle Dolly.

More importantly, safety was substantially improved and appreciated by the linemen since no men were required to: aerially clear wedged or jammed sheaves; change out X100 blocks during the pull or; be positioned in a bucket truck at each angle to hold out the stringing blocks.

The time and cost savings for each job will vary depending upon a number of factors.  For instance, the same project with new construction only would have yielded a savings of roughly $70,000 since twelve of the crew-hours saved were attributed to the rebuild.  A double circuit project would double the project savings.  Also, the job highlighted was constructed in Iowa with one of the lowest men+equipment rates in the United States. If that same job were constructed in California, the saving would have almost doubled due to higher local rates.

Available from:

Versatile

Works with any size hardline or wire.

Standard

Comes in three block sizes: 22″, 28″ and 36″.

Must Have

More than pays for itself on each job.

Improve Safety

Save Time

On EVERY angle structure,

EVERY time!

Call For a Quote:

(800) 666-6567

Asked

and

Answered

We’re happy to answer any questions!

Does the ANGLE DOLLY really pay for itself on each project?

Utilizing the ANGLE DOLLY saves from having to install small stringing blocks for the pulling rope or hardline and then stop the pull to change them out to a larger conductor block that needs to be physically fixed at some angle. An average of 2 crew hours is saved on every angle structure! Most customers experience larger savings.

How does the ANGLE DOLLY improve safety?

The ANGLE DOLLY eliminates the need to stop a pull during hardline installation if the hardline jumps out of the wheel and gets hung up on the dolly frame.

What do the vertical rollers do on the ANGLE DOLLY?

During rope and/or hardline installation, the ANGLE DOLLY rollers ensure the pulling rope or hardline does not get hung up on the dolly frame. Once the conductor passes thru the angle block, it seats down in the pulley groove. The conductor weight is usually large enough to keep it in the pulley groove but the rollers provide protection against instances when the conductor is temporarily not in the groove.

Can the ANGLE DOLLY be used with any pulling rope or hardline?

Yes! The ANGLE DOLLY was specifically designed for pulling rope/hardline. Any size pulling rope/hardline can be used with the ANGLE DOLLY.

Can the aluminum conductor strands be damaged by the ANGLE DOLLY vertical rollers?

Not if it is rigged properly. The ANGLE DOLLY is designed to swing freely, so in instances where the conductor pops out of the groove very little force is applied by the vertical rollers on the conductor until it reseats back into the groove. As is the case with any stringing block/dolly that is restricted from swinging freely by the transmission line support structure or arm, the conductor strands can be damaged by being forced out of the groove and onto the stringing block frame. At least in the case of the ANGLE DOLLY, the conductor will be stopped from contacting the frame by the vertical rollers, providing some level of protection to the conductor.

Can the ANGLE DOLLY vertical rollers be damaged during the wire installation process?

Yes, if proper block rigging techniques are NOT utilized the ANGLE DOLLY vertical rollers can be damaged. If the ANGLE DOLLY is rigged to swing freely, there is very little force on the rollers when the hardline comes out of the block groove. Because of the small forces applied with proper rigging, the vertical rollers will show very little sign of wearing on most projects.

How do I know what size ANGLE DOLLY to use?
The ANGLE DOLLY comes in 3 sizes: 22”, 28” and 36” diameters. Utilize standard industry practices and size the ANGLE DOLLY diameter for the conductor you will be installing.
Can the ANGLE DOLLY be used on ACSS conductor?
Yes! The ANGLE DOLLY can be used on ANY type or size of conductor!
Is training required before using the ANGLE DOLLY?

If a lineman has passed the necessary schooling and training required in standard block rigging techniques then the same knowledge and techniques can be applied to ANGLE DOLLY rigging. Consult with your job supervisor or your Wagner-Smith representative if you have any questions.

Can the ANGLE DOLLY be used on any line angle?

Yes the ANGLE DOLLY can be used on any line angle as long as proper rigging techniques are used and it is rigged to swing freely.

Proper Rigging

As with all stringing blocks, ensure proper rigging techniques are ulitized as found within IEEE 524 “Guide to the Installation of Overhead Transmission Line Conductors”. A copy of IEEE 524 can be found here.

Contact Us

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800-666-6567

sales@wagnersmithequipment.com

Power Line Products, LLC

Sales@AngleDolly.com

 

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