Multiple lift rigging, or “christmas treeing,” is prohibited for construction activities other than steel erection because of the hazards involved, including beams hitting other objects or people. OSHA’s Sub Part R 1926.753 addresses the use multiple lift rigging assemblies, and a 2005 OSHA letter of interpretation provides additional explanation. Because of the necessity for this work practice in steel erection, crew members should understand the dangers and follow best practices.
In 1998 OSHA updated its respiratory standard (29CFR1910.134), this replaced the outdated 1971 standard. We're closing out 2017 and we still find confusion on the topic of respirators.
Let's make this simple:
Does the side of the box read "NIOSH"?
Is 'NIOSH' stamped on the dust mask?
If the answer is yes, it's a respirator!
Exposure to lead can cause serious health hazards for workers. Short-term overexposure, while less common, can cause damage to the brain that develops into seizures or even cardiorespiratory arrest. Long-term overexposure can damage the central nervous system, blood, urinary and reproductive systems.
A Blood Lead Level (BLL) of 10 is associated with impaired kidney function, high blood pressure, nervous system and neurobehavioral effects later in life. With a BLL above 40, workers experience headache, fatigue, sleep disturbance, joint pain, myalgia, anorexia, and constipation.
Red line indicates how the retractable lifeline was left extended and unattended during a break from work, putting it at exposure to damage from welding arc.
A construction crew installing bleacher seating and treads was using retractable vertical lifelines for fall protection. When taking a lunch break, the crew left the unattended equipment extended and attached to a permanent guardrail on an adjacent structure. During that time, the steel erector’s employees continued to weld plate washers on column anchor bolts, as they had been doing during the previous hours, prior to the construction crew taking a break. The lifeline acted as a ground conductor and the lifelines were damaged.
Entrapment and crushing injuries in boom lifts most often occur when the operator is reversing, slewing, or elevating the platform into an unacknowledged obstruction. Unexpected movement of the boom is also a contributing risk factor. According to International Powered Access Federation data from 2012, 19 entrapment fatalities occurred in 2012.
Photo from NSW Trade & Investment Mine Safety Investigation Report of a 2014 fatality of worker, crushed while using a mobile elevated work platform. Photo shows the approximate position (after recovery of worker). Incident Report
Hand injuries account for about one-third of all disabling job-related injuries each year. More than 80% of these injuries are caused by pinch hazards. Injuries can include cuts, bruises, fractures and even amputations. About 20% of these injuries become infected.