Page 66 - Safety Memo

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b. The LAZ shall be established on the unscaffolded side. 4. Manufactured protective covers shall be approved by Cal/
1722(a)(2) OSHA per 344.90.
c. The width of the LAZ shall be equal to the height of the 5. Personal fall protection must be used while employees
wall to be constructed plus 4 ft. and shall run the entire place or tie rebar in walls, columns, piers, and other
length of the wall. 1722(a)(3) structures more than 6 ft. high. 1712(e)
d. The LAZ shall be entered only by employees actively Exception: Personal fall protection is not required during
engaged in constructing the wall. No other employee point-to-point horizontal or vertical travel on rebar up
shall be permitted entry. 1722(a)(4) to 24 ft. above the surface below if there are no
impalement hazards.
e. The LAZ shall remain in place until the wall is
adequately supported to prevent collapse unless the
height of the wall is more than 8 ft., in which case the Illustration 1 | Troughs
LAZ shall remain in place until the requirements of
1722(b) have been met. 1722(a)(5)
D. Precast, prefabricated concrete construction, tilt-up, 2" x 4"
panels. 1715
Protruding
1. An erection plan, addenda, and procedure shall be
prepared by or under the direction of a Professional Reinforced Steel
Engineer registered in California.
2" x 4"
2. The erection plan, addenda, and procedure shall be 1" x 6"
available at the jobsite.
3. Jobsite inspections shall be made by the responsible
engineer (or representative) during the course of erection.
1" x 8"
4. Proposed field modifications shall be approved by the
responsible engineer.
E. Rebar and other impalement hazards. 1712 1 1/2"
1. Employees working at grade or at the same surface level
as exposed protruding rebar or similar projections shall
be protected against impalement by guarding exposed 3"
ends that extend up to 6 feet above grade or other work 14 Gauge Steel Trough
surface, with approved protective covers or troughs (see
Illustrations 1 and 2). 1712(c)
24"
2. Employees working above grade or above any surface
and who are exposed to protruding rebar or similar
projections shall be protected from impalement by: Troughs can be used for impalement protection providing
a. The use of guardrails, or the following applies:
b. Approved fall protection systems, or • The trough designs shown above can be used when
employees are working at heights of 6 ft. or less
c. Approved troughs and covers per 344.90, 1712(c). “above grade.”
3. Job-built wood protective covers and troughs shall be • If employees are working at heights above 6 ft. the
built of at least “standard grade” Douglas Fir.
design must be specified by an engineer (Ca PE).

20 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 21