A derrick is a lifting device composed at minimum of one guyed mast, as in a gin pole, which may be articulated over a load by adjusting its guys. Most derricks have at least two components, either a guyed mast or self-supporting tower, and a boom hinged at its base to provide articulation, as in a stiffleg derrick. The most basic type of derrick is controlled by three or four lines connected to the top of the mast, which allow it both to move laterally and cant up and down. To lift a load, a separate line runs up and over the mast with a hook on its free end, as with a crane.
Forms of derricks are commonly found aboard ships and at docking facilities. Some large derricks are mounted on dedicated vessels, and known as floating derricks and sheerlegs. The term derrick is also applied to the framework supporting a drilling apparatus in an oil rig. The derrick derives its name from a type of gallows named after Thomas Derrick, an Elizabethan era English executioner.
Application. This section applies to guy, stiffleg, basket, breast, gin pole, Chicago boom and A-frame derricks of the stationary type, capable of handling loads at variable reaches and powered by hoists through systems of rope reeving, used to perform lifting hook work, single or multiple line bucket work, grab, grapple, and magnet work. Derricks may be permanently installed for temporary use as in construction work. The requirements of this section also apply to any modification of these types which retain their fundamental features, except for floating derricks.
New and existing equipment. All new derricks constructed and installed on or after August 31, 1971, shall meet the design specifications of the American National Standard Safety Code for Derricks, ANSI B30.6-1969, which is incorporated by reference as specified in § 1910.6.
Rated load marking. For permanently installed derricks with fixed lengths of boom, guy, and mast, a substantial, durable, and clearly legible rating chart shall be provided with each derrick and securely affixed where it is visible to personnel responsible for the safe operation of the equipment. The chart shall include the following data:
Nonpermanent installations. For nonpermanent installations, the manufacturer shall provide sufficient information from which capacity charts can be prepared for the particular installation. The capacity charts shall be located at the derricks or the jobsite office.
Over time, many of the derricks were removed as operations were consolidated, and others were encroached upon as the city and its suburbs expanded to engulf them. Those that remain can be found in the parking lots of fast food restaurants, fenced off alongside homes and highways, hidden behind rows of trees alongside parks or even in tucked into the sandtraps of fancy area golf courses.
The Occupational Health and Safety Administration (OSHA) has delayed its deadline for employers to ensure that crane operators are certified by one year. When new licensing requirements for crane operators go into effect November 10, 2018, electric utilities should be aware of the requirements relating to the operation of digger derricks.
OSHA largely exempted digger derricks, or radial boom derricks, from the new third party licensing requirements. This exemption was put in place to keep electric generation and transmission utilities from having to cover more than $21 million annually in regulatory compliance costs, but the exemption extends from an earlier rule from 2013 that places limitations on the actual functions of the digger derrick.
The rule, as it currently exists, exempts 95 percent of utility work. OSHA stated the remaining five percent is highly unlikely to be exempted, and there is no great savings in business, safety, or labor costs to be had by doing so.Although most electric utility construction work using digger derricks is exempt, the work still must meet industry-specific OSHA safety regulations under OSHA 29 CFR 1910.269, including all applicable safety standards for motor vehicles and mechanized equipment identified in Subpart O and electric power transmission and distribution safety guidelines described in Subpart V.
OSH has adopted the following standards which are applicable to cranes and derricks in North Carolina. Note: Please also check the standards information and activity webpage to see if there has been any recent or upcoming regulatory activity on this topic.
Industry Guide 48 - OSHA Construction Industry Standards Requiring Programs, Inspections, Procedures, Records and/or Training provides requirements for standards related to cranes and derricks along with other construction standards.
Industry Guide 49 - OSHA General Industry Standards Requiring Programs, Inspections, Procedures, Records and/or Training provides requirements for standards related to cranes and derricks along with other general industry standards.
Industry Guide 54 - OSHA Marine Terminal Standards Requiring Programs, Inspections, Procedures, Records and/or Training highlights the requirements of standards related to cranes and derricks at marine terminals.
Standards Notice: SN 44 - Upper and Lower Controls on Vehicle-mounted Elevating and Rotating Work Platforms discusses the circumstances under which upper and lower controls are required for multipurpose equipment, such as digger derricks, aerial devices and other combination devices.
Versalift digger derricks deliver a lower true cost of ownership through smarter, more reliable design. With a range of digger derricks, purposed for both utility distribution and telecommunications, Versalift distributors deliver a complete fleet solution, with scheduled maintenance, annual inspections, on-site repairs, parts, training and the best warranty rate in the industry.
A Versalift digger derrick is a good example of highly specialized hydraulic equipment that is used in the utility and telecommunications industries. Digger derricks are used to dig holes, set poles and handle an assortment of materials. They are especially valuable in construction of new networks, and in replacing infrastructure damaged by inclement weather or disaster.
Versalift Digger Derricks offer fleets a lower true cost of ownership, with best in class payload due to smarter, lightweight design. Customers experience ease of maintenance, because the units feature non-lube bearings, and a single grease fitting for the rotation bearing. Two sets of controls are available on Versalift digger derricks: full pressure Hydraulic controls with open center system, and radio remote controls with closed center hydraulic system. Contact your Versalift distributor for options and configurations.
As the industry quality leader in bucket trucks, Versalift also manufacturers aerial devices, digger derricks and other specialty equipment for power generation, transmission and distribution, investor-owned utility, telecommunication, light & sign, and tree care industries. Working with co-ops, municipalities, government agencies and corporations through its global network of facilities and family of distributors, the company manufactures, sells and services bucket trucks in North America, South America, and Europe and employs nearly 700 associates worldwide. For further information about telescopic articulated bucket trucks please contact us at firstname.lastname@example.org.
Versalift is a leading manufacturer of bucket trucks, digger derricks, cable placers and high reach aerial lifts for power generation, transmission and distribution, telecommunication, sign, light, and traffic, and tree care industries.
Cameron provides a variety of drilling derricks, purpose-built to meet our customers' preferences with respect to loading and operational conditions. We design and fabricate the derricks to comply with all industry standards, using the latest 3D design tools and focusing on low weight and life cycle cost, easy fabrication, quick quayside erection, and complete interfaces with drilling and third-party equipment. Our derricks are built to handle triples and quads and rated up to 1,250 tonUS at the top drive stem. API monogramming is also available.
Once the digger derrick operator participates in any construction activities outside of the stated exemptions for the telecommunications/power transmission industry, then his or her requirement is to be nationally certified, in line with all other mobile crane operators conducting construction-related activities. Violating Subpart CC rules while operating a digger derrick voids the exemption for that employer, and violations may also be assessed under the cranes and derricks standard.
The construction and manufacturing industries require many types of specialized equipment, including cranes, derricks, hoists, elevators, and conveyors. These types of equipment are used to move large and heavy loads, providing a critical link between construction design and project management. While each of these has its own specific purpose, each also comes with its own set of safety risks and potential hazards.
Safely operating cranes, derricks, hoists, elevators, and conveyors requires great attention to detail and advanced safety planning. After completing our online course, construction professionals will be able to identify the major causes of relevant accidents, develop plans to ensure safety before cranes and other equipment are used, and point out precautions that must be taken when working near power lines. 2b1af7f3a8