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Material Suppliers and Material Supply Drivers
The liquid structural material supplier (typically the ready mixed concrete supplier) brings the material from the batch plant to the job site. They shall be responsible for the batching, transportation, quality and uniformity of components, and delivery into the material placement system. They are NOT responsible for the mix design, unless specifically asked to provide a design.
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RESPONSIBILITIES:
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Provide a mix consisting of the material components specified.
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Deliver the material according to the specified time criteria.
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Train the liquid structural material supply drivers about the duties and hazards of working with material placement systems.
The liquid structural material supplier driver delivers material into the hopper at a rate sufficient to prevent air from being introduced into the material placement system.
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RESPONSIBILITIES:
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Maintain material in the hopper at a level above the agitator and below the hopper grate.
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Notify the material placement system operator or, if unable to do so, activate the emergency controls when the mixer truck is empty or if air is observed entering the material placement system.
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Notify the material placement system operator or, if unable to do so, activate the emergency controls if foreign material is observed discharging from the mixer truck into the hopper.
Ironworkers, carpenters, inspectors, insurance representatives doing site inspections and many others may not be included in the ASME B30.27 Standard, but they do have a responsibility—to watch out for others, especially those who do not have placing hazard training.
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