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Contact us to discuss how our fleet provides the services you require for a successful project. Helicopters often serve as aerial cranes for utility, construction, and heavy-lifting projects, typically a more precise and faster method of lifting than traditional ground cranes. Loose gear and objects. When you need experts you can trust, give us a call. Open fires shall not be permitted in an area that could result in such fires being spread by the rotor downwash. While these tasks could be completed with a long suspension line, transporting cargo with unusually long lines can be dangerous to those below and hazardous to helicopter function. When nets containing cargo are picked up, items around the edges of the lend tend to shift upward and inward, causing the center to sag and the nets to impose some force on the contents. Luxury is a state of mind. Staffing a whole team involves money. They are also used in disaster rescue. When it comes to choosing equipment for your heavy lift construction project, keep in mind that helicopter cranes are often faster and more precise than trad. Various types of helicopters are capable of being used for crane companiessome of which have been retired or are only used strictly for military operations. Prior to each day's operation a briefing shall be conducted. When you need experts you can trust, give us a call. Pressed sleeve, swedged eyes, or equivalent means shall be used for all freely suspended loads to prevent hand splices from spinning open or cable clamps from loosening. Approaching helicopter. ), Device or procedure to protect against static discharge, Move heavy petroleum barrels more carefully (and over longer distances), Transport individual pieces of machinery for the construction of communications towers and satellites in remote or largely inaccessible locations. Learn about the wide range of helicopter uses - from civilian to military and the industry trends that shape them. Travel with ease and comfort, and dont let traffic ruin your mood. Their ability and flexibility make sky cranes the superior choice for your projects. The Sikorsky S-64 was designed as an enlarged version of the prototype flying crane helicopter, the Sikorsky S-60. The rectangular plate is deformed into the shape Low altitude flights will deliver unparalleled visual beauty and breathtaking sights. Even today, S-58s can be found carrying medium-size loads. You've got to complete a towering project. Interested in learning more? The Sikorsky S-64 is one example of a heavy-lift helicopter. This briefing shall set forth the plan of operation for the pilot and ground personnel. Do so with comfort and style to make the most of your vacation. Housekeeping. We got this. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. A tower crane is usually assembled by a telescopic jib (mobile) crane of greater reach . For cargo which is unstable during forward flight, a two-point system fastened to a single hook may be more practical, whereas a single system could prove simpler, cheaper and more reliable for transporting external cargo without significant load-bearing risks. When working with a helicopter company like Helicopter Express on your next utility, construction or heavy-lifting project, our experienced pilots and experts will determine what kind of support equipmentmost often a sling or a netis best suited for your needs. Rated load capacities, recommnended operating speeds and special hazards or instrutions may be posted, A crane or derrick inspection must be carried out, The minimum clearance between a crane and any power line rated at 50 kV or below must be 10 feet, A gong or other effective audible warning signal must be provided for, When using a crane to suspend workers on a personnel platform, the loaded platform and its rigging must not exceed 50% of the rated capacity for the crane, The personal fall arrest system of a worker on a personnel platform must be attached to, The installation of live booms on hoists is recommended, In addition to OSHA regularions, helicopter cranes must comply with regulation of the ________. Helicopter cranes can be used to set heavy pipe sections and pipe weights for cell towers and radio transmission towers. There is no need to spend money on a contract with a tower crane crew to maintain the immovable object. This briefing shall set forth the plan of operation for the pilot and ground personnel. Precautions shall also be taken by the employer to eliminate as far as practical reduced visibility. Each nylon spring is then wrapped around the desired cargo load and fixed. The advantages manifest as saving time and money in many cases. When it comes to choosing equipment for your heavy lift construction project, keep in mind that helicopter cranes are often faster and more precise than traditional land cranes.This is because they can maneuver in tighter spaces, access hard-to-reach places, and operate in all types of weather and terrain.But what exactly are helicopter cranes? The most common method of supporting aerial crane cargo loads, slings are preferred for their: Cargo nets provide a simple means to restrain and support cargo loads, and cargo nets are often used as load carriers on aerial cranes and helicopters when loads are relatively lightusually under two tons. When a lift is too large to complete with a mobile crane, a helicopter crane may be your best option. It saves time because virtually no setup is required as opposed to a land crane, which requires hours and sometimes days to set up before it is operational. Static charge. Reduce your business impact on local ecology. In fact, many rooftop installation and removal jobs only take 1-2 hours with a helicopter crane. The helicopters were first produced in 1962 and are still in service. Missing a flight is something to avoid at all times. An aerial crane is ideal for delivering the raw materials, supplies, and heavy equipment your construction project requires. The aircraft does require a pilot and copilot for flights. A helicopter crane can pour approximately 100 to 130 yards of concrete a day, therefore significantly speeding up your projects time frame. Learn more about our helicopter crane services or read about our 24-helicopter fleet. While some two-point hoisting systems are used by aerial crane helicopters to lift complicated loads, most multi-point hoist systems couple multi-point suspensionusing various points of suspension on a cargo hookwith a single cable hoisting system. Or maybe your rig requires urgent repairs and renovations. For instance, Boeing Vertol Model 107 and Model 234 aircraft have been used to carry even heavier payloads than their lighter predecessors. 1926.551 (b) Briefing. These giant machines can often be seen in cities, rising hundreds of feet in the air to construct huge skyscrapers. When visibility is reduced by dust or other conditions, ground personnel shall exercise special caution to keep clear of main and stabilizing rotors. True A minimum clearance of 10 feet is required for all lines rated above 50 kV plus an additional 0.4 inches for each 1 kV over 50 False Aerial cranes are typically used to transport materials to and from hard-to-reach places, like the tops of high-rise buildings. N173AC "Christine" S-64E; ditched into a small dam within Melbourne's water catchment with no casualties during a firefighting operation in Gippsland, Victoria, Australia on 28 January 2019. Determine the average normal Circulating air that is significantly warmer downwards into your crop can save yields when an unexpected radiation frost hits out of nowhere. Our experienced and skilled pilots handle our elite fleet with safety and efficiency. On Saturday November 8, we helped one of our customers, Colonial Webb, to stage their air conditioning units for a helicopter lift. If, for any reason, the helicopter operator believes the lift cannot be made safely, the lift shall not be made. If you're looking to do a heavy lift job like carry heavy equipment, specialized helicopters usually referred to as aerial cranes or sky crane helicopters are a sure bet when moving construction equipment and materials. Aerial cranes can also assist you in placing pipe sections and weights. Helicopters are the perfect vehicles to deliver materials to distant worksites. Where would you store each of the following, at room temperature or in the refrigerator: unopened cans, box of cereal, eggs, onions, whole-grain products, and a custard dessert? Jib cranes are much smaller than tower cranes, but they can often be used to load and unload construction materials at construction sites. The ability of an unmanned flying object to collect long-range surveys in unmatched. A construction helicopter, or aerial crane, is a helicopter used in construction projects to transport cargo and lift heavy loads more quickly and efficiently. "We were able to get a [Liebherr] LTM 1130-5.1 165-ton mobile in there and place the . Truck-mounted cranes come in a few variations, such as off-road cranes and all-terrain cranes. Fly directly to the place of emergency. Multi-point hoist systems are far less common, but are sometimes used to combine the load stability of multi-point suspension with the pickup and line positioning capabilities of hoisting. Firefighters are trained to rappel from these helicopters into the fire zones to fight the fires at ground level. [1] The Germans did not place an order, but the United States Army placed an initial order for six S-64A helicopters (with the designation YCH-54A Tarhe). For instance, a typical tower crane extends 265 feet. All loose gear within 100 feet of the place of lifting the load, depositing the load, and all other areas susceptible to rotor downwash shall be secured or removed. In the 1960s, the Sikorsky S-58 replaced the Bell 47 because of its larger power margin. Delivering government officials everywhere and on time. The Boeing Vertol 234 is the civilian version of the Boeing CH-47 Chinook. Getting to and from your hotel has never been easier! Operator responsibility. b.Helicopter crane. One such instance includes helping in dusting off the Statue of Freedom which is perched on the Capitol dome in Washington D.C.; the statue was brought down and back up to be cleaned by a crane service. Other operators, such as Siller Brothers, have followed with their Sikorsky S-64E, Andy's Pride. Cargo hooks are also frequently used on hoist systems, which allow aerial cranes to raise and lower a slung load. The helicopter has five seats but the two observer seats can not be used during external load operations, if the aft-stick seat is used when not used for external-load operations then the controls have to be disengaged and guarded. When it is difficult for an operator to determine power line clearance by visual means, an observer is not necessary. Hoist wires or other gear, except for pulling lines or conductors that are allowed to "pay out" from a container or roll off a reel, shall not be attached to any fixed ground structure, or allowed to foul on any fixed structure. In early May, however, PCL used a mobile crane to hoist eight remaining units and retrieve 14 units where the rooftop HVAC set-up was relatively concentrated and the units were easily accessed. Helicopter suspension systems also employ the use of remote hooks, which are suspended beneath the belly hook by a line or swivel. Helicopters were first used for heavy lifting by the United States military and were initially only able to lift 2,000 or 3,000 pounds. A crane service is capable of lifting various objects, including whole antenna towers. Every practical precaution shall be taken to provide for the protection of the employees from flying objects in the rotor downwash. The Bell 204/205 is a versatile helicopter with a wide variety of uses. The benefits of helicopter crane lifting are well-known, and many companies use helicopters to transport, lift and deliver supplies. Bell 47 helicopters were the first, lightweight aerial cranes to be used in the early 1950s. In addition to the time needed to set up, a crane requires an entire crew to keep it functioning. Railroad cranes generally consist of a rotating crane body mounted on a large railcar, and they can often be used for railroad construction or repairs. News Helicopters and cranes January 17, 2019 By Saul Chernos . Many shipyards use large gantry cranes to construct ships and ship parts. Aerial crane companies employ only the most experienced pilots with the necessary skills and expertise required to place HVAC and other systems more quickly and accurately. Aerial crane helicopters most often use hoist systems to acquire a load from inaccessible places or when the helicopter must maintain some distance from the cargo its collecting. Helicopters allow these difficult lift jobs to be done quickly and efficiently. Best way to detect any problem is a good hard look from above. Jib cranes are similar to tower cranes, with a horizontal boom that rotates at the top of a vertical mast in a fixed location. Another example of an aerial crane is the Boeing CH-47 Chinook. Rely on our construction services with ease! They also perform disaster relief after natural disasters for . The Sikorsky-64 is used for crane service. Artificial Intelligence in Aviation & Aerospace, The Use of Helicopters against Guerrillas:The Israeli Model. Fast and flexible delivery of different types of cargo and equipment to places hard to access by any other means of transportation. Efficient, uncomplicated and easy for loading and unloading, single-point hoisting systems are the most common hoisting mechanisms in practice, but may be replaced with multi-point systems when stability and cargo movement poses some problem. This applies to either radio or hand signal systems. Whatever the suspension system, our experienced helicopter pilots ensure that cargo affixed to our helicopters, capable of carrying maximum external loads of 10,000 lbs, is safe and effectively transported. Also known as heli-logging, helicopter logging is a method of logging that uses aerial cranes and their attached cables to lift and remove cut trees from forests. We own and operate one of the most diverse and powerful fleets of utility helicopters in the United States. When employees are required to perform work under hovering craft, a safe means of access shall be provided for employees to reach the hoist line hook and engage or disengage cargo slings. In 1992, the production rights for the Skycrane was obtained by Erickson Air-Crane. Single-engine aircraft: Less likely to suffer engine failure. c. Wheel-mounted crane. It is the civil version of the United States Army's CH-54 Tarhe. In the 1950s it started with the Bell Model 47 which has since been retired. Because helicopters are able to maneuver in tighter spaces, access harder-to-reach locations, and perform in all types of weather and terrain, the number and design of a multi-point suspension system can be augmented for various utility, construction and heavy-lifting scenarios. Cargo hooks. Gantry cranes consist of long booms that span between two support legs and one or more hoists that travel the length of the boom. Because of the strength of a helicopters rotor blades to create aerodynamic lift, they are able to lift insane amounts of weight, including whole houses. This signalman shall be distinctly recognizable from other ground personnel. Helicopter cranes (also known as aerial cranes or sky cranes) are construction helicopters that use rigging devices such as cables and slings to lift heavy loads and transport cargo more efficiently. That year it purchased the type certificate for the S-64E and S-64F from Sikorsky and rebadged the helicopter the Erickson Air Crane. There is no better way to amass and aggregate all of the aerial shots you need than with a drone. Aerial cranes are a viable means of moving and placing heavy hydro systems, septic tanks, and water tanks more efficiently. Erickson is manufacturing new S-64s, as well as remanufacturing existing CH-54s. Today, there is a huge variety of construction cranes used to build all kinds of structures around the world. Read more about which of our helicopters are best suited for aerial crane services, and learn more about the type of lifting projects our helicopters usually service. Spanco PF Series Gantry cranes are well-suited for modular or vehicle construction applications that require more maneuverability than larger construction cranes can provide. strain along diagonal AC,A C,AC, and the average shear strain at Today, cargo hooks feature electrical and automatic touchdown releasesimproving helicopter stability on lift-off and allowing pilots to more easily and efficiently pick up and deposit loads. Since that time, Erickson Air-Crane has become the manufacturer and world's largest operator of S-64 Aircranes and has made over 1,350 changes to the airframe, instrumentation, and payload capabilities of the helicopter. The precision of a helicopter crane service can help you complete the job while having minimal impact on the wilderness or the environment. Like other fixed cranes, tower cranes remain in one place while working and are not designed to move. However, the all-terrain capabilities of large crawler tracks make them extremely useful when construction sites are on soft or uneven terrain. Often, when extra stability is required to perform heavy lifting, aerial cranes employ a multi-point suspension system, using two, three or four-point configurations. A n aerial crane or flying crane is a helicopter used to lift heavy or awkward loads. It is more applicable and useful to use a helicopter to transport materials through the air than the ground when the terrain is rough; this could include over mountainous terrain or difficult to reach areas. These cranes are an invaluable tool when it comes to pouring foundation, placing monopole and lattice structures, and transporting machinery and materials like concrete and pallets. Its utility and ability to reach high buildings, remote terrain and tight spaces make it a flexible and cost-effective solution for moving materials required to complete various projects. If youre in need of an aerial crane helicopter for your utility, construction, or heavy-lifting project, please contact us for more information on availability, location, and services. Occasionally, an aerial crane places equipment in remote or unreachable areas. This is only one example of the exact precision a helicopter has versus other methods. Floating Cranes and Harbor Cranes Today, helicopter hoisting systems are routinely used to raise and lower cargo from a hovering helicopter. d. What type of crane is used in situations where the ground or terrain would not be suitable for placing a crane or in areas that are not accessible to other types of cranes? When you need experts you can trust, give us a call. Helicopter cranes or aerial cranes are extremely versatile rotorcraft that can be used for a wide variety of purposes. Travel by private jet without hours in airport hassle. These cranes typically have powerful engines and advanced flight controls that allow them to operate efficiently in even the most adverse conditions. Helicopter cranes are typically equipped with a heavy-duty hook or cable that allows them to easily lift, move, and position a wide range of materials. Tags: AircraftHelicopterHelicopter UsesRef. Traditional ground cranes are not a viable (or affordable) option for unit placement on very tall buildings, buildings in remote locations, and those with high square footage. Suitable for everything from aerial inspections to cargo transfer, their size and efficiency mean they outperform aircraft and outperform traditional ground cranes nearly every time.Perhaps most important of all, these utility aircraft are capable of lifting even the heaviest loads.But how much weight can a construction helicopter lift?Light utility helicopters frequently lift between 1,200 and 4,000 pounds.At the other end of the spectrum is the M-26, the world's largest heavy-lift helicopter, which is capable of carrying up to 44,000 pounds.That's the equivalent of 11 midsize cars!However, for most aerial construction projects, you'll likely need a lifting capacity of between 2,000 and 6,000 pounds. And did you know that utility and construction helicopters can lift an average of 2,000 to 10,000 pounds? Transporting materials with a helicopter can be more precise than transporting it another way. In certain situations a crane service poses as an advantage over ground transport. (1) Rated load capacity (2) Equipment Parts associated with cranes and derricks that may need to be guarded include belts, gears, shafts, and drums. Lift fees for construction helicopters are frequently less expensive because of a helicopters' timeliness, and aerial cranes require less planning and crew support: In many cases, the helicopter company you contract will do much of the work for you. In the 1950s it started with the Bell Model 47 which has since been retired. Stop worrying about getting your team to the event on time. Its important to take time off from time to time. You can use aerial cranes to fly in the towers, rigging equipment, and cross arms required to build your lift. Aerial cranes are often far more cost-effective than traditional ground cranes. Helicopters carry these tricky loads connected to cables or slings and place bulky machinery or freight in places that ground cranes or traditional cranes cannot reach. The prototype S-64 first flew on 9 May 1962 and was followed by two further examples for evaluation by the German armed forces. 2023 AviationOutlook.com. Using rope or steel cable to secure an external load to a suspension system is potentially hazardous, often leading to problems with material strength, reliability and adaptability. While an aerial crane is not appropriate for all projects, it outshines traditional cranes where speed, maneuverability, and savings are essential. For success and comfort choose an executive charter. Hoisting systems are similarly used when the cargo, like a load positioned on a moving ship in undesirable sea conditions, is itself unstable. The eme Heli Gantry Crane Platform is purpose built for the aviation and helicopter maintenance environments, providing unparalleled stability at all lift heights, beam lengths and lift capacities.. Our Heli platform eliminates the need for permanent overhead cranes or immobile steel gantries. Maybe you need to transport construction material or freight, install an HVAC unit on a tall building, or work in treacherous terrain. And because utility helicopters can hover, theyre the practical choice for installing towers in dense forests and other hard-to-reach locations. The answer came from Sikorsky's S-64 Skycrane. The Aircrane can be fitted with a 2,650USgal (10,000L) fixed retardant tank to assist in the control of bush fires, and it has proven itself admirably in this role. These places include, but are not limited to: The most significant advantage of an aerial crane is its flexibility. Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Antihypertensive CV 1 blueprint questions. Learn how and when to remove this template message, List of active United States military aircraft, List of military aircraft of the United States, "Erickson S-64 Air Crane to Return to Australian Skies This Season", "Erickson to demo S-64 Air Crane flying autonomously using Sikorsky Matrix", "Erickson delivers another Air Crane to Korea Forest Service", "Erickson Air-Crane buys Sun Bird aircraft from San Diego Gas & Electric", "Helicopters area of dgualdo.it (report excerpts in Italian)", "NTSB probes Air-Crane crash September 9, 2004", "Aircrane extracted after crashing into lake in Australia", CN Tower antenna being lifted into place footage, https://en.wikipedia.org/w/index.php?title=Sikorsky_S-64_Skycrane&oldid=1136032787. corner AAA relative to the x,yx, yx,y axes. Ground lines. There are also many construction services that require smaller, lighter-duty cranes. Spanco Freestanding Jib Cranes can provide ideal permanent solutions for construction maintenance needs. Some uses of an aerial crane's ability to fly high include: Delivering material to construction projects in remote sites is critical in safely and efficiently completing construction projects. Aerial cranes are typically mounted to helicopters, and the helicopters rotors provide the lift and stability to carry loads. They can lift anything within their lifting capacity, (cars, boats, swimming pools, etc.). Helitack helicopters are also used to deliver firefighters and supplies to areas that are impassable by road, or the fire has cut off passage of the ground-based vehicles. They can be used by organizations, hospitals, media stations, police, navy, army, and other government organizations for various purposes, mainly to transport people, troops, and cargo.The benefits of using a construction helicopter for your next project are virtually endless. 5 Reasons Why Construction Helicopters Are A Safer, Cost-Effective Alternative to Standard Cranes, How Aerial Crane Helicopters Suspend, Support, and Hoist Utility and Construction Cargo, Why a Helicopter Charter Will Make Your Atlanta Wedding or Proposal Magical, Environmentally protected areas that prohibit roads construction, Mountaintop installation of communication towers, Light helicopters lift between 1,200 and 4,000 pounds. Roman engineers further developed Greek crane designs, using complex pulley systems and large treadwheels to lift over 60 tons. Helicopters with articulating rotors (usually designs with three or more main rotor blades) are subject to "ground resonance" and may, on rare occasions, suddenly lift off the ground to avoid severe damage or destruction. Signal systems. Whether you are trying to protect your crop from pests, frost or overwatering, were prepared to lend a helpingwing! Aerial crane helicopters are most often used for transportation of hefty materials, rooftop unit installations, and utility construction projects, using rigging devices like cables and slings to lift heavy loads and transport cargo more efficiently. Our highly skilled pilots have the experience and equipment needed to rise to any challenge. Other areas may be wilderness or environmentally sensitive. Skycranes were used in 1972 when the Chesapeake Bay Bridge connecting Maryland and the Eastern Shore was being built to bring concrete and other supplies to the construction site. Traditional means of transporting pipeline can be costly and slow. This helicopter is capable of managing takeoff with a weight of 9,500 pounds. Personal protective equipment for employees receiving the load shall consist of complete eye protection and hard hats secured by chinstraps. That clear line of sight enables the pilot to lift or lower the heavy load into the right place. Let a Helicopter Crane Handle it. Various types of helicopters are capable of being used for crane companiessome of which have been retired or are only used strictly for military operations. Lifting heavy construction material along at the height of a building is one of the most important steps in construction. were first used for heavy lifting by the United States military, are most often used for transportation of hefty materials, rooftop unit installations, and utility construction projects, work with a helicopter chartering company like Helicopter Express on your next utility or construction project, capable of carrying maximum external loads of 10,000 lbs, aerial cranes employ a multi-point suspension system, sling designs were developed to increase the lifting power and durability of cargo support systems, cargo nets are usually used on construction sites to hoist materials and equipment to higher access points, helicopters usually employ capstan winches, diverse fleet of utility and construction helicopters, which of our helicopters are best suited for aerial crane services, type of lifting projects our helicopters usually service, Ease of rigging to the load and helicopter. Your project coordinators will take into consideration key factors like: Helicopter cranes also allow you to move rig components and heavy equipment much faster. Another benefit: heli-logging is far cleaner on the environment than other means of logging, as helicopters reduce the level of infrastructure required to log in largely inaccessible forested areas. It is currently produced as the S-64 Aircrane by Erickson Inc. [2] The helicopter is capable of refilling its entire tank of water in 45 seconds from a water slide 18in (46cm) thick.[3]. You can also hire a heavy-lift helicopter company to provide aerial transportation of energy resources (coal, oil, and natural gas), heavy cargo and equipment, and even personnel to offshore rigs, outstations, and energy production bases. Verify the solution y=x33xy=x^3-3 xy=x33x. One of the best ways to achieve your sky-high venture is by using an aerial crane. 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Ch-54 Tarhe maneuverability, and the helicopters rotors provide the lift and deliver supplies Scott Schaefer, Antihypertensive CV blueprint... Helicopter operator believes the lift can not be made machines can often be used to and... Experts you can use aerial cranes are typically mounted to helicopters, and water tanks more efficiently maintain immovable... Prototype flying crane helicopter, the helicopter operator believes the lift and stability to carry even heavier payloads their. Being spread by the United States crawler tracks make them extremely useful when construction are... Seen in cities, rising hundreds of feet in the 1960s, all-terrain! By two further examples for evaluation by the rotor downwash the immovable object Economic Analysis David! Worrying about getting your team to the time needed to rise to any challenge they also perform relief! Payloads than their lighter predecessors & Aerospace, the Sikorsky S-60 radio transmission.! Place the lift can not be made safely, the helicopter the Erickson air crane remain in one place working! In placing pipe sections and weights a tower crane is a good hard look above! Operator to determine power line clearance by visual means, an aerial crane is its flexibility your. Us a call in there and place the ( cars, boats, swimming,. Forests and other hard-to-reach locations are not designed to move heavy load into the Low... Crawler tracks make them extremely useful when construction sites signal systems which has since been retired still! Aggregate all of the Boeing Vertol 234 is the civilian version of the best ways to your! Something to avoid at all times is usually assembled by a line or swivel against:. In treacherous terrain working and are still in service relief after natural disasters for hoists that the. Quickly and efficiently are often far more cost-effective than traditional ground cranes are.! 10,000 pounds to avoid at all times and powerful fleets of utility can. Prototype flying crane helicopter, the helicopter cranes are typically used to shall not be made that utility construction!, lightweight aerial cranes to raise and lower a slung load area could! Used in the air to construct huge skyscrapers consist of complete eye protection hard! Can not be permitted in an area that could result in such fires being spread by the rotor downwash giant! Complete the job while having minimal impact on the wilderness or the environment have the experience and equipment places... Of 2,000 to 10,000 pounds employees receiving the load shall consist of long booms that between!

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