Forensic Engineers and Consultants

Archive: Workplace Injuries

Commercial Gas-Fired Cookers Can Do More Than Burn

The first hazard that comes to mind when thinking about large scale ovens and steam kettles is burning or scalding injury. Carbon monoxide poisoning is just as dangerous but less understood, so oftentimes proper prevention methods are not followed. In the United States, this results in over 20,000 emergency room visits and over 400 deaths a year. Before we get to the case study and poisoning prevention methods, we need to know what CO is, where it comes from, and why it is poisonous. Read More

Figure 2: A close view of the opening of the heat sealer. A person’s hand will fit in the opening below the guard to the left. Two "Danger" stickers are visible.

Injury Involving Packaging Machinery

Author

From time to time, I and other engineers here at Warren are asked to evaluate a case involving an injury that has been caused by machinery designed to produce or fill packaging. The hazards associated with packaging machinery are often similar to other commonly-used industrial machinery, but packaging machinery has its own voluntary consensus standard for machine safety. Read More

stock-picker-forklift

Evolution of Narrow-Aisle Stock Picker Forklifts

Author

As the cost of warehousing has increased over time, material handling equipment has evolved to allow higher density storage capacities. Narrow aisle and order picker forklifts are among the innovations that have evolved over the past 50 years to accommodate this trend. Read More

Figure 2: A view of some of the undersize anchors used to secure the capstan winch. The anchors at the upper right failed by pulling out of the concrete slab. The one at the lower left failed by bending and pulling out.

Injury Involving a Capstan Winch

Author

Co-Authored with Jeff Warren, PE   

A capstan winch uses a mechanically powered rotating cylinder, called a capstan, to apply pulling force through a rope. When the rope is looped around the rotating capstan and tightened, friction between the rope and capstan allows the winch to apply force to pull a load. A typical capstan winch is shown in Figure 1 below. Read More

Figure 2.  A view looking into the mixer. The grate and ribbon are visible. The grate openings are large enough to admit a worker's leg.

Case Study of an Injury Involving a Soil Mixer

Co-Authored with Aron Olson, P.E.

In May, 2014, a plant farm worker was seriously injured when he fell into the hopper of an electrically powered soil mixer.  The mixer in question used a rotating steel ribbon powered by a 7-1/2 hp electric motor to mix batches of materials such as sand, mulch, wood shavings, fertilizers and other landscaping materials to create potting soil. At the top of the hopper sidewalls, within 6 inches of the ribbon, was a steel grate. Read More

Warren engineers,   John Holecek and Aron Olson working with new fall protection equipment.

Not Falling for Your Job?

Periodically, Warren Engineers and Consultants are asked to perform inspections that require work at raised elevations. Typical jobs and tasks include climbing on commercial and residential roofs with steep pitches, working on scaffolding, climbing from one level to the next at a fire or industrial loss scene, riding in the buckets of lift equipment, and inspecting exterior structural elements such as windows and masonry.  Read More

steel-decking

Metal Decking Provides for Building Stability and Worker Safety

Author

It’s simple, right?!  Buildings being constructed must maintain a structural stability at all times during the steel erection process. That’s according to OSHA Federal Register Subpart R 1926. OSHA also reminds us that “Since structural collapse is second only to falls as a cause of fatalities in the construction industry, stability is essential to the successful erection of any steel structure, including single- story, multi-story, bridges, etc.” Let’s further examine what goes into the erection and installation practice for roof or floor metal decking as a safe working platform. Read More

A view of two workers inside a recirculation paint spray booth, clothed in personal protective equipment as required by OSHA Standards.

The Down and Dirty on Paint Spray Booths Recirculation Systems

Back when I first started in the safety field in the 70’s it was not uncommon to see spray painting operations where there was no exhaust system and in others paint vapors were exhausted straight into the environment. Needless to say this was not good for our environment and also wasted a lot of paint. Read More

Don't let your building become a disaster?

Major Causes of Wood Truss Failures

Author

It’s a fact! Many roof structures fail during the construction process while others have taken years for an incident to occur. Buildings with proper design and construction of bracing systems are essential in reducing and/or eliminating wooden roof truss failures.
Read More

Industrial process lines often have critical safeguards in place to protect workers.

Design Can Prevent Industrial Accidents

Two of the top causes of workplace accidents, according to the United States Department of Labor’s Occupation Safety and Health Administration, are a lack of machine guarding and improper control of hazardous energy. At first blush, these types of incidents can mistakenly be attributed to an employee’s actions without considering how a machine’s design or the improper control of an environment or situation may have contributed.
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