MSA WORKMAN - Using the Workman Tripod; Planning System Use and Clearance

US
MSA Workman® Tripod
16
3 Use
3.1 Planning the Use of Systems
3.1.1 Rescue and Evacuation
The user must have a rescue plan and the means at hand to implement it. The plan must take into
account the equipment and special training necessary to effect prompt rescue under all foreseeable
conditions. If the rescue is from a confined space, the provisions of OSHA regulation 1910.146 and
ANSI Z117.1 must be taken into account. Although a rescue plan and the means to implement it must
always be in place, it is a good idea to provide means for user evacuation without assistance of others.
This will usually reduce the time to get to a safe place and reduce or prevent the risk to rescuers. If the
Workman Tripod is to be included as part of rescue or evacuation systems, the optional system compo-
nents required, the time required to erect the Workman Tripod and attach any optional components,
and the anchorage requirements should be considered when planning these systems.
3.1.2 Free Fall Distance
Do not exceed free fall distance specified by applicable regulations and standards. When using a
shock absorbing lanyard, keep the amount of slack between the anchorage/anchorage connector and
the harness/waist belt at a minimum to reduce the free fall distance and the impact force to the user.
3.1.3 Leg Base Clearance (inside and outside)
Clearance between the position of the Workman Tripod feet when erected and in working position and
the access through which the worker will be lowered shall be such that none of the Workman Tripod
legs will be positioned above the access or be allowed to fall into the opening. Clearance between the
working position of each of the Workman Tripod feet and the outside of the anchorage shall be a
minimum of 3 ft (0.9 m) and shall allow unrestricted movement of support personnel above, under, and
around the tripod during erection, use and compaction.
Care must be taken to avoid tripping over the tripod, or otherwise creating an event that could dislodge
the tripod from its intended location.
Maintain sufficient clearance between the tripod legs and the opening to ensure any unintended
shifting of the tripod does not cause the tripod leg to fall into the opening.
A minimum distance of 18 inches (0.5 m) between the legs and opening is recommended.
Fig. 3 Required clearance around the outside of the Workman Tripod