Winter Tree Climbing

true that
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Chip, Your info is good.

Tom, you did qualify your statement about moiture content and air drying with an ambient humidity reference but FYI stabilization at 15% would only happen in very high humidity areas. Typical air dried stabilization will be at around 8%-9%. In low ambient humidity areas (such as the desert southwest)wood can drop below 5%MC-at which point even non-brittle woods become quite brittle.
 
Tom,

To be honest, I never spend much time in or around trees when it's below 0*F. I do notice a change in very small material (2" or smaller) below 15-20*F. Never had a problem with hingewood while felling in the cold.
 
Taylor---you're a pup
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After spending at least a week a year in the Boundary Waters on the Canadian border in February where wood is heat and cooking I've dealt with lots of frozen wood. Doing treework on calm sub zero days is where I learned about frozen green wood.
 
How many climbers switch from footlocking to Mar-Bars or ascenders when the mercury drops? Also, if tension wood breaks twice as fast as compression wood, is that number increased with the increased {brittleness}? What methods are being used to combat throwline freezup (in the field)?
 
With all my extra clothing and snow-caked boots, I have been ascending SRT with the Frog Walker setup. Super energy saver. I bring my throwlines inside every night (along with my harness and ropes used that day). Let's 'em thaw out and dry.
 
-30°C = -22°F ... relatively close

-35°C = -31°F

-40°C = -40°F

-45°C = -49°F

Notice the 5 and 9 pattern. One degree change in °C equals 1.8 degree change in °F.
5 X 1.8 = 9

15°C is a 15 unit departure from 0°C. (0°C=32°F)
15 X 1.8 = 27 32°F + 27°F = 59°F

Or... what I find easier: 5°C change = 9°F change
 
I footlock all winter long with traditional prussik. I find all the resistance of clothes a good workout. Helps to make my footlock time faster!!!!
 
I find that if I let'em dry out overnight, they behave better on the job. Also, before I pack'em up in the morning, I flake the line out while running it through pinched fingers (get's the twists and hockles out). Back in the cube with another pinch and I've got a tangle free throwline. (usually)
 
http://www.visi.com/~jweeks/bridges/index.html

I can't think of any draw bridges. Lot's of swing bridges and a couple lift bridges, though. When I was a kid, we would drive down to the Rock Island bridge and pay a $1 toll to cross. Only one lane, so there'd be a line of cars on either side waiting for the flaggers.

I usually get by with merino longies and Arborwear double front pants. Four to five layers up top.
 
I guess lift bridge is a better description. Big arse counterweights on each end. I love Merino wool. I am researching it now, notice that some is "Merino" and others "Fine Merino", do the "Fine Merino" sheep come a uppity farm in Merino? Also, Fine merino seems to itch less. A good salesman will sell work with easy access in deep snow, and set you up with safe work. Asfar as our work, the only thing that has changed is the pace. Plowing and snowblowing take some time. Icy and snow covered limbs make for challenging climbs. We have actually cabled quite alot the past 2 weeks, thankfully with wirestops!
 
Trudging through 18" of snow, slipping and sliding across limbs last Thursday. This time of year, I take what I can get, although we didn't work today. Waaaaayyy too cold. Pick and choose if we can.
 
Hey Jamin,

This is completely off the subject, but if you want to turn that 32* into 32°, type 32 then hold the ALT key and on the numeric keypad, key in 0176 and then release the ALT key.

It has to be done on the numeric keypad to the right of the alpha-numeric keys. I.e., it won't work with the number keys above the alpha keys.
 
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