Section R. 408.42520 - Concrete mixing, pouring, and floatingRule 2520.
(1) A concrete mixer that is equipped with a 1-yard or larger loading skip shall be equipped with a mechanical device to clear the skip of material.(2) A guardrail that is capable of withstanding a 200-pound side thrust shall be provided on each side of a skip on a mixer that has a capacity of 1 or more yards.(3) The handle on a bull float that is used where it may contact an energized electrical conductor shall be constructed of nonconductive material or shall be insulated with a nonconductive sheath that has electrical and mechanical characteristics which provide the equivalent protection of a handle constructed of nonconductive material.(4) A powered and rotating-type concrete troweling machine that is manually guided shall be equipped with a control switch that will automatically shut off the power when the operator removes his or her hands from the equipment handles or switch.(5) The handles of a concrete buggy shall not extend horizontally beyond the wheels on either side of the buggy.(6) A concrete bucket that is equipped with a hydraulically or pneumatically operated gate shall have a positive safety latch or a similar safety device installed to prevent premature or accidental dumping. The bucket shall be designed to prevent aggregate and loose material from accumulating on the top and sides of the bucket.(7) An employee shall not be permitted to ride a bucket or walk or work under a bucket that is suspended from a crane or cableway.(8) A concrete bucket that is positioned by a crane or cableway shall be suspended from an approved swivel safety-type hook.(9) A pumpcrete or similar system using discharge pipe shall have pipe supports that are designed for a 100% overload. Compression air hoses in the system shall be provided with positive fail-safe joint connectors to prevent the separation of sections when pressurized.(10) A runway, ramp, or scaffold shall be provided for placement of concrete in areas such as walls, piers, columns, and beams, as prescribed in Construction Safety Standards Part 12 "Scaffolds and Scaffold Platforms," Part 21 "Guarding of Walking and Working Areas," and Part 45 "Fall Protection," as referenced in R 408.42503.(11) A concrete mixer, or other equipment, such as a compressor, screen, or pumps used for concrete construction activities, where inadvertent operation of the equipment may occur and cause injury, shall be locked out when an employee is performing maintenance or repair. An employee who is inside a concrete mixer performing maintenance or repair shall have the only key to the lock.(12) Sections of tremies and similar concrete conveyances shall be secured with wire rope, or equivalent materials, in addition to the regular couplings or connections.Mich. Admin. Code R. 408.42520
1980 AACS; 1982 AACS; 1989 AACS; 1996 AACS; 2003 AACS; 2013 AACS; 2016 MR 16, Eff. 8/17/2016