hoisting apparatus drawings

[chester]

I was looking at some of my Father's old construction manuals and came across an instruction book for hoisting apparatus construction and operation. I placed a few detail drawings in an album here:   

http://s191.photobucket.com/albums/z79/chesterf/blueprints/hoisting%20aparatus/

This is a sample:

[darrylhuffman]

Thanks Chester for the photos.

As common and as essential as derricks were in the old days, I am amazed more people do not really take the time to do them right.

I have seen things in magazines that absolutely would not work in real life.

Darryl Huffma
darrylhuffman@yahoo.com

[Philip Smith]

Most useful photos!

thanks 

[lab-dad]

Thank you!
Very cool!
-Marty

[Ray Dunakin]

Very helpful, thanks for posting those!

[Scratchman]

I found this at Silver Reef Utah.



Gordon Birrell

http://www.flickr.com/photos/77318580@N00/