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Waterstop History To accommodate varying pressure and movement, most thermoplastic and rubber waterstops come in different extruded profiles, widths and thicknesses. For years the most widely used waterstops were those anchored by having a dumbbell shape at each end, creating a ‘cork-in-the-bottle’ seal when the joint opens. However, this seal is less effective at small joint movements and wider movements. To overcome these issues, BoMetals has manufactured profiles with multiple raised ribs to improve anchoring and sealing performance.  Choosing Waterstop Size  Waterstop size (width) is determined by the expected head of water pressure to be encountered at the joint. The...

The Occupational Health & Safety Administration (OSHA) reports that over 4,000 workers were fatally injured on the job and that one in five of those deaths were related to construction workers. The leading causes of these accidents rest in three categories.

It’s that time of year again. As we begin to hit the heat of summer, it is important to think about proper concrete placement practices to combat the heat. But first let’s look at why hot weather is a problem. Concrete sets as the cement hydrates. Hydration is an exothermic reaction, meaning it generates heat, and that reaction goes faster when the concrete is hot. So the main concern with the concrete's strength and set time isn't really the air temperature but the concrete temperature. When cement hydrates it sucks up water and grows crystals around the aggregate particles. When...

Every year, dozens of workers die and thousands more become ill while working in extreme heat or humid conditions. More than 40% of heat-related worker deaths occur in the construction industry, but workers in every field are susceptible. It is very important to know and recognize the signs and symptoms of heat stress. Below please find an infographic that displays the signs of heat exhaustion and heat stroke and what actions you should take if you notice any of these symptoms in yourself or others.        It is important to stay cool and avoid heat stress on the...

Like many labor-intensive jobs there are inherently occupational safety hazards of working in the concrete construction industry. At Arco, we believe that you, your co-workers and supervisors should all take the necessary steps to eliminate any potential dangers that exist on your job site. When it comes time to start your next concrete construction job, plan in a way that prevents the following hazards: 1. Chemical Burns  2. Respiratory irritation, illness or infection  3. Injuries for improper lifting  4. Form blowout  5. Injuries from falling objects  6. Falls from elevated platforms  7. Vehicle accidents Then, implement the guidelines mandated by...