Environmental Hazards - DBI SALA Delta Vest Manual Del Usuario

Figure 6 - Fall Clearance
Connecting Subsystem
(Energy Absorbing Lanyard
shown)
Working Level
NOTE: When calculating
fall clearance, an
additional 6 in. (15.3
cm) should be included
to allow for expected
.
harness stretch
Lower Level or Obstruction
D. SWING FALLS: See Figure 7. Swing falls occur when the
anchorage point is not directly above the point where a fall
occurs. The force of striking an object in a swing fall may
cause serious injury or death. Minimize swing falls by working
as close to the anchorage point as possible. Do not permit
a swing fall if injury could occur. Swing falls will signifi cantly
increase the clearance required when a self- retracting lifeline or
other variable length connecting subsystem is used.
E. EXTENDED SUSPENSION: A full body harness is not
intended for use in extended suspension applications. If the
user is going to be suspended for an extended length of time
it is recommended that some form of seat support be used.
DBI-SALA recommends a seat board, suspension workseat,
seat sling, or a boatswain chair. Contact DBI-SALA for more
information on these items.
F. ENVIRONMENTAL HAZARDS: Use of this equipment in areas
with environmental hazards may require additional precautions
to prevent injury to the user or damage to the equipment.
Hazards may include, but are not limited to; heat, chemicals,
corrosive environments, high voltage power lines, gases,
moving machinery, and sharp edges.
G. HARNESSES FOR HIGH TEMPERATURE ENVIRONMENTS:
Harnesses with Kevlar webbing are designed for use in high
temperature environments, with limitations: Kevlar webbing
begins to char at 800° to 900° Fahrenheit. Kevlar webbing
can withstand limited contact exposure to temperatures up to
1,000° F. Polyester webbing loses strength at 300° to 400° F.
PVC coating on hardware has a melting point of approximately
350° F.
Free Fall
6 ft. max
(ANSI Z359.1)
Total Fall Distance
(Free Fall +
Deceleration)
Deceleration
Distance
11
Figure 7 - Swing Fall
Swing
Fall
Hazard