Have just joined this list (as I just found it) and have been reading throught he posts. Everyone makes some very good points regards vehicles as anchor points, there are many excellent options to use. Just a couple of comments I have, based on experience. Many of the industrial tripods and davits (such as may be bumper mounted on a vehicle) may be only 6 nto 8 feet high. This may be fine for the typical lifeline/harness combination on a confined space entrant for performing non-entry rescue, which we would generally like to be our first action, however, if we have to place someone in a stakes or sked, or another device (the old reeves sleeve comes to mind), then when we do a vertical hoist we would like to have a higher anchor point as we will have the 6 1/2 to 7 feet of packaging, about a foot or more of bridle, and the hauling system or at least a pulley between our anchor and the ground. If we can't clear the space with this entire assembly, we then have to manhandle the victim out of the hole, working in a potentially dangerous environment (especially regards slips and falls) and are putting ourselves at risk for injuries from these hazards as well as lifting in an awkward position. One of the "high anchors" I advocate for fire departments, if they can access the space appropriately, is the tip of their aerial ladder truck. My recommendation for a rescue tripod is at least 10 feet (you may not always be able to extend it this high depending on the location and configuration of the space) and preferably a 12 foot tripod. That having been said - ALL SPACES ARE DIFFERENT. Each space should, according to 29 CFR 1910.146, be preplanned as part of the companies Confined Space Plan, and any specialized equipment or informatin should be addressed.
Someone else made a comment about "mechanical winches" not being allowed. This may be your department or team policy, however, one must be cautious if your interpreting that as part of 1910.146. The term mechanical winch can be used to mean 2 specifically different types of equipment. The standard does allow for "manually operated" winches - which are mechanical devices, looking very similar in operation to the winch on a boat trailer (but there are some significant differences). The devices which should never be used are those that are powered (by electric motors, hydraulic motors, or gasoline engines), as these devices have absolutely no way of feling any increased resistance on the hauling line which would be an indication that the victim is hung up on something, and they will continue to pull until something breaks - usually the victim. All of the manually operated hauling devices (mechanical advantage systems, hand cranked winches, etc) will allow the operator to FEEL the increased resistance, stop and re-evaluate the situation.
Hoping to hear more from everyone. Train safe, work safe, go home to your loved ones!
I agree with that. Solid rims on a vehicle ARE considered "bomb-proof" anchors here in the states. We have drilled with this type of anchor point before. (I have pictures of this on my profile) And we have also used this in a live rescue and our vic was anchored to our Heavy Rescue. Both were successful. I have more faith, to be honest, in the force of gravity on a Heavy Rescue truck weighing several tons versus a vertical pole in the ground or a metal structural member that could have unseen flaws. I am with Lutan on this one.