hammsarborcare
New member
- Location
- Wisconsin
On Thursday April 20, 2000 my brother was sick and I went to work anyway alone. I misconnected but didn't visually inspect and foot-locked up to 33 feet, put my feet on a stub, started my Husky 339 to cut a branch and fell backwards to the ground landing on my head and shoulders with my head pressed against a nearby second tree and my right leg suspended in an upright position on the tree I fell from and my left leg flat on the ground dressed in all my glory with the latest safety gear. A neighbor woman was watching me out her kitchen window at the very moment of my fall (bad day for her). An off-duty first responder was driving three blocks away listening to her scanner. I was med-flighted to a hospital within an hour. So I experienced and survived, by the Grace of God, the most touted reason to never work alone: You might die because no one will rescue you. But I ask, what exactly were the odds of something happening that day and would the presence of my brother have helped?
Periodically in safety talks I share a formula: R x (R - 1) = Risk Factor Total people on site x Total - 1 = Risk Factor. I operate from the premise that we are all fallible human beings. It is, after all, how I was able to not visually inspect. I made a mistake. For every fallible human being we add to a work site, the risk of incident does not go down, it goes up and it goes up logarithmically.
Two people on site 2 x 1 = 2 There are two ways for something to wrong
Three 3 x 2 = 6
Four = 12
Five = 20
six = 30
seven = 42
Eight = 56
Nine = 72
Ten = 90
We recently worked a large job with a crew of 10. Our safety awareness needed to be elevated due to the extreme risk of something going wrong. Technically in this formula it is necessary to count equipment and the tree as a person because the risk factor of working along is obviously not zero. But when I think about this formula it ALMOST makes me think: Work alone if you are able, with one other person if you need help and with a crew if you absolutely must.
I close with stating I do not promote working alone, but I have found it beneficial considering the risk factor of adding crew members to a site. Understand the added risk and communicate it with your crews. Working with a crew of ten just might be the most dangerous thing you can do.
Kevin Hamm
Periodically in safety talks I share a formula: R x (R - 1) = Risk Factor Total people on site x Total - 1 = Risk Factor. I operate from the premise that we are all fallible human beings. It is, after all, how I was able to not visually inspect. I made a mistake. For every fallible human being we add to a work site, the risk of incident does not go down, it goes up and it goes up logarithmically.
Two people on site 2 x 1 = 2 There are two ways for something to wrong
Three 3 x 2 = 6
Four = 12
Five = 20
six = 30
seven = 42
Eight = 56
Nine = 72
Ten = 90
We recently worked a large job with a crew of 10. Our safety awareness needed to be elevated due to the extreme risk of something going wrong. Technically in this formula it is necessary to count equipment and the tree as a person because the risk factor of working along is obviously not zero. But when I think about this formula it ALMOST makes me think: Work alone if you are able, with one other person if you need help and with a crew if you absolutely must.
Kevin Hamm










