Author Archive for: Justin Bolduc

 

Plastic Parts Overhead Crane

The Challenge:

To provide our customer a plastics part manufacturer with a freestanding 10 ton crane system over existing plastic injection molding machines.

 

Special Consideration:

1)       Limited clear height in building.

2)      Spacing of machine limits location of freestanding runway columns.

3)      Delicate handling of dies.

 Our Team Approach:

Our project manager precisely measured the building and location of plastic injection molding machine.  We located the runway column between the existing machine; this required different lengths of runway beams.  The 10 ton single girder crane was supplied with a low head room hoist to overcome the low building height.  We recommended a two-step variable speed radio controlled crane for precise handling.   

Results:

The customer located a new machine in a different location.  During the installation, Crane-Tec relocated two columns at no addition cost to the customer. 

The customer is able to change large dies in the machine safely and quickly.

 

Steel Warehouse Cranes

Steel Warehouse Facility 10 ton cranes with dual 5 ton hoists.

 

Crane-Tec supplied (2) 10 ton dual hoists cranes to a steel warehouse facility in South Dakota.  Considering the customers business and expertise the customer supplied steel for the project and saved thousands.

Crane-Tec crews installed the crane, crane rail and electrification successfully without a hitch.

The cranes were equipped with hoist summation overload limit devices, bridge travel limit switched and radio remotes with hoist A – hoist B selector switches for simultaneous and independent control.  This is the second set of cranes the customer has purchased from Crane-Tec and we look forward to continuing to work with them as they grow.

 

Midwest Mine Maintenance Facility 25 Ton Crane

25 ton Top Running Double Girder Crane for Mine Maintenance Facility

 

Crane-Tec just completed the turn-key Design, Fabrication and Installation of a 25 ton long span crane for a mine maintenance facility in the Midwest.  Crane-Tec was contacted by the General Contractor to supply drawing and assist I in the design phase.

 

Crane-Tec supplied and installed the overhead crane, crane rail and electrification on-time and to a satisfied customer.

 

15 Ton Double Girder Cranes Ship to Nebraska

(2) 15 ton Top Running Double Girder Class D cranes shipped to Nebraska

 

Crane-Tec was recently contact by a steel fabricator in the Midwest to supply (2) 15 ton overhead crane in a new addition that was nearing completion.   The customer wanted the crane shipped in 6 weeks from contacting Crane-Tec.

 

We turned around pricing that day and were soon under contract to supply the cranes.  Crane-Tec was fortunate enough to have that chance to work with a local overhead crane service company to install, start-up and test the cranes.

 

The overhead cranes were equipped with hoist overload switches, bridge travel limit switched and remote operation.  The cranes were fabricated and shipped on-time to the customer ready to take off the truck set on the rails in his new addition.

 

12 Ton Single Girder Overhead Crane

12 ton Single Girder Overhead Crane

 

Crane-Tec was recently contacted to supply a 12 ton single girder crane and 300 feet of crane rail and crane electric for a Metal Wall Panel manufacturer in the Midwest.  The project consisted on (1) 12 ton top running single girder overhead crane and 300 feet of 40# crane rail and 4 bar electrification.

 

Crane-Tec worked with the General Contractor and Pre Engineered Metal Building supplier to determine the most practical and cost efficient design.  Crane-Tec crews installed the overhead crane, crane rail and 4 bar electrification in less than 3 days.  Crane-Tec technicians then arrived on-site to inspect the crane and install radio remote controls.

Crane-Tec utilized a low headroom design Shaw-Box World series 15 ton monorail hoist and had the hoist de-rated to a 12 ton capacity.  All controls are housed in a NEMA 4/12 enclosure and all wiring is plug-in.  The hoist incorporates triple reduction, helical, oil bath lubricated gearing in a cast aluminum gear case.  We had heard good things about the Shaw-Box hoist and after putting our hand on one and building a crane incorporating the hoist we know what we heard was true.  This is a well made piece of equipment utilizing the best components and engineering advances.

 

Another project and Overhead Crane that Crane-Tec can be proud of and stand behind.

 

20 ton Freestanding Overhead Crane System

20 ton Freestanding Overhead Crane System & 2 ton Freestanding Overhead Crane System

Crane-Tec was recently contracted to supply multiple overhead cranes and runway systems to a leading fabrication and engineering firm in Indiana.  The customer had purchased a spec building that wasn’t designed for overhead cranes and came to Crane-Tec for their overhead crane solution.  Crane-Tec worked with the customer and the General Contractor to designed a 20 ton free-standing runway system to accommodate (2) 10 ton 70+ foot span single box girder overhead cranes and multiple 2 ton jib cranes.

 

Crane-Tec worked closely with the customers General Contractor and assisted in the design of the necessary crane footers.  Crane-Tec engineers design and completely independent freestanding 20 ton overhead crane system that is capable of supporting 2 ton jib cranes.  Crane-Tec also designed and installed a 2 ton freestanding workstation crane that utilized 4 ton center bay columns so the owner can easily add a 2nd 2 ton system in the future.

 

All the crane and structural steel were installed successfully and on-time.  Electronic eyes were installed on the 10 ton cranes to keep them from touching and bridge travel limit switched were instated on the runway to reduce impact of cranes into the end-stops.

The customer’s facility is now up and running and the cranes have become an iatrical part of their fabrication process.

 

Safety instructions part 4

Safety Instructions for Finishing Work with the Hoist

  1. Raise the empty hook or loading device high enough to avoid it causing a hazard to traffic, but not to the top safety limit.
  2. Leave all the controls in the O- position
  3. Press the emergency stop button to open the main contractor.
  4. Turn off the safety switches for control current and main current.
  5. Close any mechanical brakes such as rail clamps, etc.
  6. Inform your foreman of any defects you have noticed.
  7. Inform  the next operator of all abnormalities in equipment operation you have noticed.

Safety Instructions for Servicing the Hoist

  1. Carry out regular inspections and preventative maintenance in compliance with the instructions. Keep a record of inspections and servicing. Regular servicing and inspection procedures are necessary for the safe and efficient operation of the hoist. In uncertain or unusual cases, contact the supplier of the hoist.
  2. Pay special attention to the operation of the brake and limit switches, and to the condition of the hook, rope and pushbutton controller. It is essential that safety devices (overload protectors, limit switches, etc.) work correctly and are in full operating order because they safeguard against human error.
  3. Use trained servicing personnel authorized by the manufacturer of the hoist for servicing the hoist. The person servicing the hoist must be competent for the task and must be familiar with the servicing and inspection instructions.
  4. Use only genuine spare parts approved by the manufacturer of the hoist.
  5. Any modifications or additions made to the hoist’s structures or performance values must first be discussed with the supplier of the hoist.
  6. Any inspections and repair operations carried out on the hoist after an overload or collision must be discussed with the supplier of the hoist.

 

  • by
  • ,
  • on September 19, 2011 -
  • Uncategorized
  • |
  • Comments Off on Part 3. Lifting the Load- Things that you do not want to do

Part 3. Lifting the Load- Things that you do not want to do

  1. Do not lift people on the hook or load. Lifting people with a hoist is prohibited unless the hoist is designed and manufactured for that purpose(this must always be agreed with the supplier of the hoist).  Do not go under the hook or a load. Do not move the hook or load over a person. A load must never be lifted in a way that can injure a person if the load drops.Do not operate the hoist if you know that medication, an illness, or other such handicap impairs your alertness or working ability.
  2.  Do not lift a load that is fastened to its base or that is heavier than the maximum permissible load for the hoist or lifting accessories. A jerking or static load can cause an overload. A hoist may only be used for those loads and load combinations, and at those speeds, for which the hoist has been designed and manufactured.  Raise the load high enough to prevent it from hitting objects during travel. However, do not raise it higher than is necessary for the situation. Do not raise the hook to the top safety limit.
  3. During hoisting and travel motion, ensure that the hook, the load, and the crane and its moving parts do not collide with objects or people.  If the hoist is provided with a horn, sound the horn when you move the load in the vicinity of people who are not paying attention to the moving load.  Do not move the load until you have received a signal from the person attaching the load to the hook or lifting appliance.  Do not use the overload protection for weighing the load.
  4. Stop all hoisting and travel motions before the safety limit switches.  Do not adjust or bypass the limit switches or warning devices in order to go past motion limits. Do not use the hoist if the limit switches are inoperative.  If the manually-adjusted backup limit switch in the hoist has triggered, call a serviceman to the hoist and ask him to determine why the normal safety limit switch did not function.  Do not use the hoisting rope as a lifting lug.
  5. Do not use the hoist if there are visible defects in; or damage to, the hoist, the hoisting rope, or any other hoist structure or hoist function. Stop operating the hoist if it operates abnormally (for example, a high noise level, uneven starting, or malfunctions).Using faulty equipment is strictly prohibited.  If defects have been noticed in the hoist, carry out the necessary inspections and servicing. Ensure that the hoist operates properly before you start to use it again.  Do not use the limit switches to stop the motions of the hoist. Hoist motions must be stopped with the pushbutton controller or other control device intended for the purpose.
  6. Use the proper pushbuttons intended for controlling the hoist. If you feel you are losing control of the hoist motions, press the emergency stop button. In a potentially dangerous situation all hoist motions can be stopped by pressing the emergency stop button, but do not use the emergency stop function unnecessarily. Ensure that it is safe to re-commence working after the emergency stop button has been pressed.  Avoid short, jerky motions. Unnecessary short starts can cause the hoisting motor to overheat quickly. The last controller step is for normal drive. The intermediate steps are normally used for short durations only. Do not switch the controller back and forth unnecessarily because it causes wear. Avoid violent collisions into other hoists or against the buffers.
  • Do not leave a suspended load unattended.
  • Do not lower the hook so far that the ropes become slack.
  • Do not pull a load from the side. Lower the load with the ropes perpendicular.
  • Do not use hoist motions to remove the load from the hook.
  • Do not weld on a hook that is not isolated. Do not fasten a welding electrode to the hoisting rope.
  • Do not change the size of fuses. A qualified electrician should carry out all electrical work.

 

Part 2 Lifting the Load

In order to get the maximum lifetime out of a hoist, you want to be sure that you are using it correctly. Using the hoist for projects out of the hoist group classification for which it was designed changes the lifetime of the product.  Before hoisting a load, be sure to determine a safe and effective path for it to travel to ensure that the load will not collide against objects or people. Also,  check that no servicemen or unauthorized persons are on the crane and that the rails and power cables are clear of obstructing objects.  Before hoisting, check that the hoisting devices are securely positioned on the bearing surface of the hook and that the safety catch on the hook is closed.

Next, you want to ensure that the load’s mass center is on the center line of the hook forging so that the load does not bend the hook neck.  Make sure that the force is applied only to the hook’s bearing surface (the lowest point of the hook) because if  force is applied to other parts of the hook it will cause undesired stresses.  Forces on ramshorn hooks have to be equal on both bearing surfaces.  Before hoisting, check that the load is balanced and safely fastened at the lifting points and also be sure that the load cannot slide, slip or detach itself when suspended.

In addition, you need to confirm that the ropes are perpendicular and that the hoist is positioned perpendicularly above the load to be lifted.  A load must not be hoisted or dragged along the ground in a way that causes side pull on the roping unless the hoist is designed and manufactured for this purpose.  When using a lifting accessory (sling, belt, etc.), always follow the instructions provided by the lifting accessory manufacturer. Finally, if two cranes are needed to handle a load, a balancing beam must be used to equalize the loading.  Combined hoisting with two cranes must be supervised by a foreman knowledgeable about cranes or by a crane specialist who is in charge of the lifting operation.

 

Wayne Miller – Field Crew Foreman

Wayne Miller has been part of the team at Crane-Tec since the mid 1990’s.  He has successfully installed over a thousand cranes ranging from 0.5 to 100 tons.  Wayne’s ability to work as a team player and trouble shoot in the field makes him a true asset to the company. In addition, Wayne Miller is a full time employee who’s primary focus is installing cranes. This sets Crane-Tec apart because the company has dedicated employees focused on one primary task.

Justin Bolduc, a Crane-Tec project manager, spent his first year out of high school working in the field with Wayne Miller.  Justin can attest to Wayne’s extreme dedication to his trade and commitment to quality. Justin explains that after fourteen years, Wayne is still installing overhead cranes with the same commitment and attention to detail.