|Publisher||American Society of Safety Engineers||Language||English|
|Content Type||Conference Paper|
|Title||Rigging 101: An Overview of Construction Rigging Practices|
|Authors||Page A. Warde, CSP, OHST|
|Source||ASSE Professional Development Conference and Exposition, June 10 - 13, 2001 , Anaheim, California|
|Copyright||2001. American Society of Safety Engineers|
One of the most hazardous operations in the construction industry is rigging and material lifting with cranes and other hoisting devices. This paper will cover the requirements necessary to achieve safe rigging practices, and specifically focus on the inspection, limitation, and precautions of this equipment.
In construction, the ability to handle and move material and equipment on projects is vital to successful phase progression and completion. Many different crafts must use rigging and hoisting equipment for the demolition, movement and placement of equipment or material. The task of material handling is, for the most part, performed by all employees. It ranges from minimal manual lifting to critical lifts requiring huge rigging and lifting equipment, but both must use basic manual handling or rigging techniques to ensure that the task is completed safely.
One of the unfortunate and preventable consequences of material handling by employees is that people can be injured. The single largest cause of these injuries is the mishandling of material. Most of the injuries could have been avoided if material had been handled by mechanical means. Another consequence of material handling as stated by OSHA's Administrator Mr. Charles N. Jeffress is that "every year, an average of 35 iron workers die during steel erection activities and 2,300 more suffer lost workday injuries". The workers who perform minimal material handling either by manual or mechanical means must be trained in the proper manual lifting or rigging techniques and work practices. Those workers engaged in special, high-risk activities must be trained and competent to perform the work. All rigging activity no matter the magnitude and scope requires planning, implementation of and the use of basic rigging safety techniques and work practices. Now lets focus on the fundamentals of and the basic safety of rigging.
The basic rigging job consists of the load, the attachment and the lifting device. Of the three, the load is the most important. The weight of the load and its physical characteristics must be known for the proper rigging equipment to be determined. In determining the weight and characteristics of the load the following may be used.
1. Documents: This would include drawings, catalogues, structural manuals (AISC) Steel Construction Manual and bills of lading. Caution must be exercised with the bill of lading because it may not be correct.
2. Load Information: The load information can be painted on the load, on a nameplate, cast or welded on the load or on a weight shipping tag.
3. Weighing the Load: Weighing the load can be done at private or public scales. Dynamometers, cable weighing scales and crane load indicator can be used, but calibration on the weighing devices must be checked.
4. Calculating the weight and center of gravity.
|File Size||112 KB||7|