Figure 6-42.A boatswains chair.
long, 30 cm wide, and 3.1 cm thick). Make sure you
always wear a safety belt when using a boatswains
chair. The safety belt should be attached to a lifeline
secured to a fixed object overhead. Use a bowline to
secure the lifeline to the person in the chair.
NOTE: A BOATSWAIN S CHAIR SHOULD
BE USED ONLY IF OTHER MEANS ARE NOT
When you are using scaffolds, SAFETY is your
NUMBER ONE PRIORITY! Failure to observe safety
precautions can result in serious injury to yourself or
coworkers. Some essential safety measures applicable
to scaffolds are given here. Use each of them routinely.
THINK SAFETY! Be a SAFE WORKER!
Structural members, support ropes, and scaffold
equipment must be inspected carefully each workday
before using them on the job. The use of makeshift
scaffolds is strictly prohibited.
When personnel are working on a scaffold with
other personnel engaged directly above, either the
scaffold must have an overhead protective covering or
the workers on the lower scaffold must wear
Navy-approved, protective hard hats. The purpose is
to provide protection against falling material. Where
the upper working level is no more than 12 feet (3.6
m) above the lower, hard hats worn by workers on the
lower level will satisfy this requirement.
An overhead protective covering consists of a roof
of lumber, heavy wire screen, or heavy canvas,
depending upon the hazard involved. The covering
should extend a suffient distance beyond the edge of
the scaffold to catch any material that may fall over
the edge. A netting of screen should not be less than
No. 18 gauge, U.S. Standard Wire, with a mesh not to
exceed 1/2 inch. Screens of heavier wire or smaller
mesh should bex used where conditions are such that
the No. 18 gauge wire or 1/2-inch mesh will not suppl y
adequate protection. Personnel should NOT be
required to work underneath a scaffold. Scaffolds
erected over passageways, thoroughfares, or locations
where persons are working should be provided with
side screens and a protective covering. A side screen
is a screen paneling from the platform to an
intermediate railing or from the platform to the top
railing. Screening is formed of No. 16 U.S. gauge wire
with 1/2-inch mesh. Screen is used for the purpose of
preventing materials, loose or piled, from falling off
A safe means of access should be provided to all
scaffolds by means of standard stairs or fixed ladders.
Additionally, ensure that a scaffold is properly secured
Personnel should not be permitted on scaffolds
which are covered with ice or snow. In such instances,
clinging ice must be removed from all guardrails, then
the planking sanded or otherwise protected against
slipping. Workers should not be permitted on scaffolds
during a storm or high wind.
No scaffold should be used for the storage of
materials, except that required for the immediate
needs of the job. Tools should be placed in containers
to prevent their being knocked off and the containers
should be secured to the scaffold by line. Always make
a special effort to ensure that tools, equipment,
material, and rubbish do not accumulate on a scaffold
to the point where the safe movement of personnel is
NEVER throw or drop objects or tools from
scaffolds. Handlines should be used for raising or
lowering objects when they cannot be reached easily
and safely by hand. Such things as jumping or
throwing material upon a scaffold platform are to be
avoided at all times.
Scaffolds must never be overloaded!
Furthermore, whenever possible, see that the scaffold
load is uniformly distributed and not concentrated at
the center of the platform.
Wire ropes and fiber lines used in suspension and
swinging scaffolds should be of the best quality steel,
manila, or sisal. Manila or sisal line used as lifelines