Page 123 - Safety Memo

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e. Tools must be unloaded if work is interrupted. 1691(h) 2. With the carriage in the full retract (raised) position, lower
blade teeth must be fully guarded, and the guard must
f. Operators must never point a loaded tool or an empty extend at least 3/4 in. beyond the teeth. 4307.1(b)
tool at anyone. 1691(i)
3. Employers shall instruct employees to keep hands and
g. The tool must be held in place for 30 seconds on fingers outside the area below the blade until the blade
misfire. 1691(l)
has come to a complete stop. 4307.1(c)
h. Different power loads must be kept in separate I. Radial arm (horizontal pull) saws are regulated as follows:
compartments. 1691(m)
1. The upper half of the saw blade and arbor ends must be
i. Warning signs that say POWDER-ACTUATED TOOLS completely covered. 4309(a)
IN USE must be conspicuously displayed within 50 ft.
of a PAT operation. 1691(n) 2. The sides of the lower exposed portion of the blade shall
be guarded as per 4309(a)(2).
j. Misfires and skipped power charges must be stored
and disposed of properly. 1689(c), 1691(a) 3. An anti-kickback device must be used during ripping
operations. 4309(c)
E. Concrete-finishing tools must be equipped with a dead-man-
type control. 1698(d) 4. Saws must return automatically to the table’s back when
released. 4309(d)
F. Airless spray guns must have an automatic or visible manual
release safety device or a diffuser nut and tip guard. 3559.1(a) 5. Saws must have a stop provided to prevent the saw blade
from passing the front edge of the table. 4309(b)
G. Circular power saws are regulated as follows:
J. Table saws are regulated as follows:
1. Portable Circular power saws:
1. A hood must cover the saw to at least the depth of the
a. Teeth on the upper half of the saw blade must be teeth. 4300(a)
permanently guarded. 4307(a)
2. The hood shall automatically adjust itself to the thickness
b. Teeth on the lower half of the saw blade must be of the material being cut at the point where the stock
guarded with a telescopic or hinged guard. 4307(b)
encounters the saw blade. The hood may be a fixed or
c. Saw guards must not be blocked open to prevent manually adjusted hood or guard provided the space
guards from functioning. 4307(c) between the bottom of the guard and the material being
cut does not exceed 1/4 in. 4300(b),(c)
2. Self-feed Circular power saws: 4301
3. Table saws must be equipped with an anti-kickback
a. In addition to guards over blades as specified in 4296, device during ripping operations. 4300(d)
feed rolls shall be protected by a hood or guard.
4. Push sticks or push blocks shall be provided at the work
b. The employer shall ensure that power feed devices are place in the several sizes and types suitable for the work
properly adjusted for each piece of stock in order to to be done. 4300(f)
reduce the possibility of kickback.
Note: The arbor speed of circular saw blades shall not
c. Every self-feed circular ripsaw shall be equipped with exceed speeds recommended by the manufacturer.
an anti-kickback device installed on the infeed side.
K. Band saws are regulated as follows:
Note: The arbor speed of circular saw blades shall not
exceed speeds recommended by the manufacturer. 1. All portions of the band saw blade must be guarded
except between the guide rolls and the table. 4310(a)(1)
H. Miter (chop) saws are regulated as follows: 4307.1
2. Band saw wheels must be enclosed. 4310(a)(2)
1. With the carriage in the full cut position, a guard must
enclose the upper half of the blade and at least 50 percent
of the arbor end. 4307.1(a)
134 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 135