#Concrete slab crack repair 27513 windows

However, the CAI/Arnel building where the explosion occurred had no natural gas supply and had a concrete slab floor. A high-pressure gas transmission line runs underground a few hundred feet south of the facility, and other low-pressure gas lines are a few hundred feet west and north of the facility. Vorderbrueggen said that natural gas remains under examination as a possible fuel source, in addition to or in lieu of solvent fumes. Depending upon the temperature of the tank, solvents could have evaporated during the overnight hours when the facility was unattended, accumulated in the building, and found an ignition source.' On the last work day prior to the accident, a heated mixing tank was filled with 2,000 gallons of printing ink ingredients, including flammable, volatile solvents such as heptane and propyl alcohol. 'The probable source of fuel for the explosion is vapor from flammable solvents that were used to produce printing inks and paints. These 'blast markers' will be interpreted using computer models in an effort to better understand the nature and the explosive force of the blast.ĬSB Lead Investigator John Vorderbrueggen, PE, said that two fuel sources are under consideration for the blast.

#Concrete slab crack repair 27513 windows

22, 2006.Ī team from the CSB documented at least 100 different examples of blast damage-such as shattered windows or broken beams-throughout the Danvers community. Chemical Safety Board (CSB) is continuing to investigate the root causes of a powerful explosion at the CAI/Arnel ink manufacturing facility in Danvers, Mass., which damaged or destroyed dozens of homes and businesses during the early morning hours of Nov. Chemical Safety Board Urges All Businesses to Pay Heightened Attention to Flammable Solvent Safety The Enhanced Enforcement Program focuses on employers who ignore their safety and health obligations, while the agency's Local and National Emphasis programs focus on specific industries or safety and health issues. OSHA has planned 37,700 workplace inspections throughout the year and will continue to focus its resources on workplaces and industries with high rates of injuries and illnesses. More than $17 million will go to increasing resources allocated to the federal enforcement, federal compliance assistance, and cooperative programs. During this same period, the overall fatality rate has declined by 7 percent and by 18 percent among Hispanic employees. Since 2001, OSHA has implemented a balanced approach consisting of aggressive enforcement, cooperative programs, outreach, education, and compliance assistance, which has yielded a 19 percent reduction in occupational illness and injury rates. This translates into substantial benefits for both employers and employees, including significant reductions in injury and illness rates which have proven to deliver millions of dollars in cost savings for participants.” “VPP recognizes exemplary work sites for their enhanced safety and health performance. “We are proposing to increase resources supporting the Voluntary Protection Programs (VPP) by more than $4.6 million,” Foulke said. The request represents an increase of nearly $18 million over the FY 2007 continuing resolution level and includes increases for federal enforcement and federal compliance assistance.įoulke explained the increase will help the agency improve workplace safety and health through compliance assistance and enforcement of occupational safety and health regulations and standards. Foulke Jr., assistant secretary of labor for OSHA announced that President Bush has requested $490.3 million for OSHA in fiscal year 2008.

The week joint of the cold slab may still crack, but with the rebar connecting the two portions of the slab, the cement will not shift and form a displaced fracture of the cement.Edwin G. After the second portion of the concrete is poured, the rebar serves as a connection between the two slabs. If the second portion of the pour will be more than two or three hours after the first portion the rebar should be set in the first portion while it is still wet. Place reinforcing rods between the first portion of the slab and the new pour. If successful, this blending of the two concrete pours will provide the strongest slab that is the least likely to crack. How hard, or setup, the first pour of concrete has become will determine if this is possible. Use a concrete vibrator to work the two sections into a single mix of concrete as much as possible. Mix the concrete from the earlier portion of the pour with the fresh concrete, if possible. Repairing Cold Joints While Pouring Cement