(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
(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.
History: 1980 AACS; 1982 AACS; 1989 AACS; 1996 AACS; 2003 AACS; 2013 AACS; 2016
R 408.42521 Forms and shoring generally.
Rule 2521. (1) Formwork, shoring, and reshoring shall be designed, erected, supported,
braced, and maintained so that they will support all vertical and lateral loads that may be
imposed upon them during placement of concrete or until the loads can be supported by
the concrete structure.
(2) Drawings or plans which are prepared by the qualified person, except as required in
R 408.42527(5) and R 408.42533(1), and which show the jack layout, formwork, shoring,
working decks, and scaffolding shall be available at the jobsite.
(3) No construction loads shall be placed on a concrete structure or portion of a concrete
structure unless the employer determines, based on information received from a person