Page 291 - Safety Memo

and disposed of properly. 1689(c), 1691(a) 2. With the carriage in the full retract (raised) position, lower
E. Concrete-finishing tools must be equipped with a dead-man- blade teeth must be fully guarded, and the guard must
type control. 1698(d) extend at least 3/4-inch beyond the teeth. 4307.1(b)
F. Airless spray guns must have an automatic or visible manual 3. Employers shall instruct employees to keep hands and
release safety device or a diffuser nut and tip guard. 3559.1(a) fingers outside the area below the blade until the blade
has come to a complete stop. 4307.1(c)
G. Circular power saws are regulated as follows:
I. Stump cutters are regulated as follows: 3428
1. Portable Circular power saws:
1. Stump cutters shall be equipped with enclosures or guards
a. All saws shall be equipped with guards above to protect employees
and below the base plate or shoe. 4307(a)
2. Each employee in the immediate area of stump grinding
b. Teeth on the upper half of the saw blade must be operations shall wear PPE as required by Article 10 of the
permanently guarded. 4307(a) GISO.
Exception: The upper guard shall cover the saw to J. Radial arm (horizontal pull) saws are regulated as follows:
the depth of the teeth, except for the minimum arc
required to permit the base to be tilted for bevel cuts. 1. The upper half of the saw blade and arbor ends must be
completely covered. 4309(a)
c. Teeth on the lower half of the saw blade must be
guarded with a telescopic or hinged guard. The 2. The sides of the lower exposed portion of the blade shall
lower guard must automatically and instantly return be guarded as per 4309(a)(2).
to the covering position when the tool is withdrawn
from the work. 4307(b) 3. An anti-kickback device must be used during ripping
operations. 4309(c)
Exception: The lower guard shall cover the saw to the 4. Saws must return automatically to the table’s back when
depth of the teeth, except for the minimum arc released. 4309(d)
required to allow proper retraction and contact with
the work. 5. Saws must have a stop provided to prevent the saw blade
from passing the front edge of the table. 4309(b)
d. Saw guards must not be blocked open to prevent
guards from functioning. 4307(c) K. Table saws are regulated as follows:
2. Self-feed Circular power saws: 4301 1. A hood must cover the saw to at least the depth of the
teeth. 4300(a)
a. In addition to guards over blades as specified in 4296,
feed rolls shall be protected by a hood or guard. 2. The hood shall automatically adjust itself to the thickness
of the material being cut at the point where the stock
b. The employer shall ensure that power feed devices are encounters the saw blade. The hood may be a fixed or
properly adjusted for each piece of stock in order to manually adjusted hood or guard provided the space
reduce the possibility of kickback. between the bottom of the guard and the material being
c. Every self-feed circular ripsaw shall be equipped with cut does not exceed 1/4-inch. 4300(b), (c)
an anti-kickback device installed on the infeed side.
3. Table saws must be equipped with an anti-kickback
Note: The arbor speed of circular saw blades shall not device during ripping operations. 4300(d)
exceed speeds recommended by the manufacturer. 4. Push sticks or push blocks shall be provided at the
H. Miter (chop) saws are regulated as follows: 4307.1 workplace in the several sizes and types suitable for the
work to be done. 4300(f)
1. With the carriage in the full cut position, a guard must
enclose the upper half of the blade and at least 50 percent Note: The arbor speed of circular saw blades shall not
of the arbor end. 4307.1(a) exceed speeds recommended by the manufacturer.
L. Band saws are regulated as follows:

140 Cal/OSHA Pocket Guide for the Construction Industry | June 2019 Cal/OSHA Pocket Guide for the Construction Industry | June 2019 141