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Photos 41 - 45 of 378

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This is a picture of the bottom of a "Guy Derrick." Think of it as a steel mast about 100 feet high with 2 inch wire cables streached out in all directions. There were perhaps 10 of these cables that held the mast vertical. A big wheel at the bottom, had attached to it, a boom that was also about 100 feet long. A cable ran through a series of pulleys to raise and lower the boom for position within the quarry below. A third cable was the actual hoist line. The operator could swing the boom in a 360 degree circle, raise and lower the boom as long as it was under the guy cables that held everything vertical, and he could hoist a block of granite out of the quarry hole. This device could pick up a 100 ton block. Some were rated even higher. See the hoist house in the next picture.
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Comments on this photo:

Nov 04 2008 04:48 GMT LisaSam67
Fabulous photo!!!!

there's a tag club in here called "memorytuesday" add that tag and it will get seen... it's really a great picture.
Nov 04 2008 05:30 GMT LisaSam67
I think I was about 10 yrs old so 1977 or so when I took that pic. That's about when my addiction to the camera began ;-)
Nov 04 2008 06:47 GMT senna3
Very impressive and very clear explanation!
Perfect memory entry!
Nov 04 2008 13:10 GMT Poulet PRO
Wonderful and informative entry!!!
Nov 04 2008 21:21 GMT mcdonegal1 PRO
Great information and excellent entry for memorytuesday!

FT2