21/02/11

Feedwater Heaters and Rotor Replacement

Market: Nuclear

Location: South Carolina

Problem

Extremely tight quarters and equipment limitations slowed down the project.

Solution

Quick thinking and new basketing devices helped complete the job.


Description

Barnhart was contracted to remove and replace rotors and feedwater heaters. The rotor was railed to site, offloaded with the 44A system, and transported easily to the crane bay.

However, when the old rotor was loaded to a nine-line trailer for transporting to storage, the crane failed at a height of nine feet off of the ground. With engineering approval, we were able to load crane mats (five high) on the trailer and safely rescue the rotor from the inoperable crane.



After that, we quickly finished the remainder of the job.

Moving the feedwater heater challenged us as well. The 4B sat under a floor and we slid it out using a light slide. Furthermore, we inverted both the 4A and 4B to clear surrounding obstructions.

We used the new basketing devices on their maiden voyage and found that they were easy to use, and that they served their purpose well.

Next, we directed them through the legs of the gantry crane, between the MSR's, down a low risk path on the Turbine Deck, and finally to the crane bay.

With the successful nuclear project, four employees gained their "nuclear" badges, making them invaluable help for future nuclear jobs. They will be particularly helpful to speed up our work in case we need faster reaction time.

Major Equipment Used

  • 9 Line PST Goldhofer
  • Specialized Rigging

17/02/11

Backhoe loader introduction

Backhoe Loaders Buyer's Guide

The backhoe loader is one of the most common pieces of heavy equipment on any size job site. The fact that it features two useful tools in one machine makes the backhoe loader a must-have for all kinds of construction and repair projects.
The standard backhoe consists of a diesel-powered, four-wheeled vehicle with the operator's cab in the middle and a tool on each end. On the front, it has a loader: a wide bucket on dual arms that is used to either pick up loose piles of material or to push dirt back into a hole when a job is finished. The rear end has a backhoe — a hydraulic-powered digging scoop on a three-jointed arm, designed to dig through hard earth. The operator needs only to turn around in his seat to switch from digging a hole to filling it back up.
Digging and refilling holes and trenches is commonly required for all kinds of construction, utility work, and landscaping. The ability to exchange the backhoe or loader bucket for a different attachment gives you even more flexibility: crushers, retractable-bottom buckets, grinders, and other tools can handle a variety of other tasks. The combination of power, relatively small size, two common tools, and flexibility makes backhoe loaders extremely useful for contractors and construction firms of many types.

backhoe loader
backhoe loader
backhoe loader
bachoe loader

14/02/11

Buying heavy equipment

When buying heavy equipment – excavators, backhoe loaders, motor graders, and even compact equipment like skid steer loaders or mini excavators– it's easy to get buried in an avalanche of specs. Engine HP, hydraulic HP, dump heights, ground clearance, dig or dump depths – they can get to be overwhelming. It's important to keep in mind that the performance of your heavy equipment depends quite a bit on the operator.

Heavy equipment controls and ergonomics
One of the most important considerations when buying heavy equipment is visibility. It's a safety concern, as well as important to efficient operation: the operator can't avoid what he can't see. During your test drive, pay attention to any areas of low visibility – particularly when using scoops or digging arms.

The control system is another central point to evaluate. Most new heavy equipment uses twin joystick controls, one that controls the overall movement of the vehicle and one that operates the hydraulics for the arm, scoop, or blade. These electronic or electrohydraulic controls require much less force to operate than mechanical controls of old – but if they're too sensitive, smooth operation can be a real challenge.

That's why heavy equipment manufacturers have introduced adjustable controls. These allow each operator to adjust the sensitivity and control pattern to match their own preferences. As part of the test drive, try different settings to gauge how effective the adjustments are.

Visibility and controls are two components of the overall ergonomics of the operator cab. Ergonomics refers to everything that goes into ease of operation and comfort for the operator. Even small extras like adjustable seats and good lumbar support can make your operators more efficient in the long run. 

Operator comfort is also greatly increased with enclosed cabs. Standard on some vehicles and an option on others, enclosed cabs let your operators concentrate on getting the job done – not the weather. For working in the chilly Northeastern winter or the sweltering Southern summer, an enclosed cab with heat and air conditioning is a huge boost to efficiency and operator efficiency.

One last tip on judging these operator-focused features: make sure you have an operator on hand to do the evaluation! While the CFO or equipment manager makes the purchasing decision, they're not the ones who'll actually be in the machine. Have one of your equipment operators come along to do the test drive – and get the real feedback from them afterwards.

Specs do count
Lastly, don't think for a minute that those performance specs are completely irrelevant. If the excavator doesn't dig deep enough, or if the wheel loader doesn't reach high enough to fill your dump trucks, they're simply not going to get the job done. Making sure the vehicle meets the basics specs required to handle your applications is always part of the heavy equipment buying process.
Chances are, you already know the importance of putting together a list of performance requirements before you purchase construction equipment. Don't forget the external dimensions, too. If your equipment needs to fit on a trailer or in a garage, the overall width and height are important considerations. Gross weight of heavy equipment can also be a concern on trailers or small bridges.

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