Page 67 - Safety Memo

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• Job-built wood troughs must be constructed of at 6. Guying and supporting of all rebar for walls, piers, columns,
least “standard grade” Douglas Fir. and similar vertical structures are required.
7. Wire mesh rolls shall be secured to prevent dangerous
Illustration 2 | Protective Covers recoiling action. 1712
F. Concrete finishing
4" square or 1. Powered finishing tools must be equipped with a dead-man
4 1/2" diameter type control.
2. Bull float handles must be constructed of a nonconductive
material if they could come into contact with energized
electrical conductors.
Protruding rebar or other
impalement hazard
Confined Spaces NEW Confined Space regs 2015
Every year several confined space entrants and would be rescuers
die from hazards, such as oxygen deficiency, toxic and explosive
Manufactured protective covers used for impalement atmospheres, and uncontrolled energized equipment. To prevent
protection must meet the following requirements: such accidents employers must be able to:
• The protective covers must be Cal/OSHA approved. • Recognize a confined space and the specific hazards
associated with that space.
• The cover surface must be at least 4 in. square. If
the cover is round, its surface must have a minimum • Know and understand T8 CCR 5156, 5157, 5158 and related
diameter of 4 1/2 in. For a trough, the protective requirements concerning respiratory protection, fall protection,
cover must be at least 4 in. wide. lock-out/block-out procedures, fire prevention, and rescue.
• The protective covers used “above grade” must be • Implement the safety orders effectively.
designed to withstand the impact of a 250 lb. weight Note: For most construction work 5158 applies; however, work
dropped from 10 ft.
in confined spaces during refurbishing operations may be
• The protective covers used “at grade” must be subject to the permit-required confined space regulations in
designed to withstand the impact of a 250 lb. weight 5157 (see 5156).
dropped from 7 1/2 ft. A. Confined space is defined in 5158(b)(1) as space that exhibits
both of the following conditions:
Mushroomed Cap
1. The existing ventilation does not remove dangerous air
contaminants or oxygen-deficient air that exists or may exist
or develop.
Mushroomed caps 2. Ready access or egress for the removal of a suddenly
cannot be used as disabled employee is difficult because of the location or size
impalement protection of the opening(s).
B. The following are examples of some of the locations which may
exhibit confined-space conditions:
Protruding rebar or other
impalement hazard 1. Trenches and excavations
2. Sewers and drains

22 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 23