Concrete mixer was invented by Gebhardt Jaeger in Columbus, Ohio. First portable mixer patented by Richard Bodlaender in 1904. T.L. Smith Company built world's largest mixers in 1920s. Modern mixers fall into three categories: twin-shaft, vertical axis, and drum
NFPA 130 standard covers fixed guideway transit and passenger rail systems. 2000 edition supersedes previous editions and includes passenger rail requirements. Developed through consensus standards process approved by ANSI
NFPA 130 covers fixed guideway transit and passenger rail systems. Standard was developed by Technical Committee in 1975. Current edition issued July 28, 2006, effective August 17, 2006
Hazard Communication MSDS must be submitted before work begins. Job Hazard Analysis must be completed weekly. Site Specific Safety Plan outlines basic requirements
Method determines construction behavior under heat load and pressure. Tests conducted in furnaces with 3x3m or 5x3m openings. Uses thermocouples, pressure sensors and deformation meters. Requires verification of design compliance with drawings
IMCA represents offshore and marine engineering companies internationally. Association promotes safety, environment and technical standards. Members self-regulate through IMCA guidelines